Driver to drive?

[Joerg]

John Larkin wrote:

On Mon, 28 Sep 2009 17:43:22 -0700, Joerg <invalid@invalid.invalid
wrote:

John Larkin wrote:
On Mon, 28 Sep 2009 20:05:23 -0400, Phil Hobbs
pcdhSpamMeSenseless@electrooptical.net> wrote:

John Fields wrote:
On Mon, 28 Sep 2009 10:25:05 -0700, John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:

On Sat, 26 Sep 2009 17:58:27 -0700, Archimedes' Lever
OneBigLever@InfiniteSeries.Org> wrote:

On Sat, 26 Sep 2009 16:52:40 -0700, John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:

On Sat, 26 Sep 2009 17:28:50 -0400, "Michael A. Terrell"
mike.terrell@earthlink.net> wrote:

John Larkin wrote:
There's the slideback technique: drive a comparator with RF on one
side, DC feedback on the other. Tease the DC appropriately.

I once made a slideback sampling oscilloscope, using tunnel diodes, as
my EE senior project. I won an award and had to attend a dreadful IEEE
chapter banquet and repeat it to a bunch of old-fart power engineers
who didn't understand a word I said. I described the slideback
sampling scope in this ng some years back and a certain party loved
the idea so much he later decided that he'd invented it himself.
http://store.americanmicrosemiconductor.com/diodes-tunnel-diodes.html
TDs are insanely expensive nowadays, ballpark $100. I used to get them
for a couple bucks from Allied. The fabrication process is insane, and
nobody ever modernized it.

There are some more modern planar germanium back diodes, essentially
low Ip tunnel diodes, but they're RF detectors, useless for switching.
Pity, I used to like tunnel diodes.

http://aeroflex.com/AMS/Metelics/pdfiles/MBD_Series_Planar_Back_Tunnel_Diodes.pdf

John
Try PiN diodes then.
For what? Certainly not switching, amplifying, oscillating, detection,
or mixing.
---
Re. switching, From:

http://en.wikipedia.org/wiki/PIN_diode

"Under zero or reverse bias, a PIN diode has a low capacitance. The low
capacitance will not pass much of an RF signal. Under a forward bias of
1 mA, a typical PIN diode will have an RF resistance of about 1 ohm,
making it a good RF conductor. Consequently, the PIN diode makes a good
RF switch."
---
Good, but not fast. PIN diodes specialize in having a lot of stored
charge, so that the signal current can be quite a bit larger than the DC
current without causing excessive distortion.

Cheers

Phil Hobbs
PINs stop behaving like PINs at low frequencies, too. So they don't
make useful wideband switches.

Got to watch the carrier lifetime. The lower the bottom of your spectrum
and the higher the RF current, the longer its carrier lifetime must be.
I found PIN diodes to be great and most of all cheap variable
attenuators as well as switched. Designed in tons of them.


But I meant active switching when I was referring to a TD. A TD would
*generate* a fast step from an arbitrarily slow drive.

I've drooled over SRDs all my life and every time I wanted to buy one I
either couldn't have one or it was outlandishly expensive. Guess
avalanching is the only game in town and if you want avalanche-rated
then a bone-simple BJT can easily shoot up to twenty bucks.

SRDs aren't hard to get. MA/Com has distributor parts, under a buck.
M-Pulse and Metelics are good about samples. If you want a few, send
me a SASE.

Oh, here it is...

229-1769 DIO SRD 30V SOT23 150PS MA44769 1PF

MA44769-287 PENSTOCK

Price 58 cents in small quantities.

They also have MA44767-287, 600 ps risetime, a little easier to drive
because it stores more charge.

These make nice edge generators and frequency multipliers. I have a
rubidium clock that generates the 6.3846826128 GHz frequency from a 10
MHz rock with an absurdly small number of cheap parts.

Thanks, John! That's a decent price. And thanks for the SASE offer, but
maybe I'll combine that with a beer at Zeitgeist when I get down there

As a kid I grew up in Europe and back then such exotic parts were very
hard to find over there, even at hamfests.

--
Regards, Joerg

http://www.analogconsultants.com/

"gmail" domain blocked because of excessive spam.
Use another domain or send PM.

 

[Joerg]

Jan Panteltje wrote:

On a sunny day (Mon, 28 Sep 2009 17:46:39 -0700) it happened Joerg
invalid@invalid.invalid> wrote in <7id3ngF30fqppU1@mid.individual.net>:

John Larkin wrote:

[...]

But I meant active switching when I was referring to a TD. A TD would
*generate* a fast step from an arbitrarily slow drive.

Forgot to mention, I was also never able to lay my hand on a tunnel
diode. The hobbyist books had schematics with them in there but that was
all bogus, just like UJTs were.

UJTs were very available.
I have used them for H and V oscillator in a vidicon camera I designed in 1968.
Also used those in thyristor drive circuits, in large quantities, same time.

Tunnel diodes were also available, but have not used them.
Worked with some equipment that had them in it.
In some of the Ampex quadruplex videotape recorders the FM modulator was a tunnel diode.

UJTs are cool.

Well, yeah, but you probably lived in the Netherlands as a kid. You guys
had dump handelaars and all sorts of electronics places. UJTs were
unobtanium in Germany. Once in a while we'd mount a car and head over
the border. But since I was a kid back then and didn't have my own car
I'd have to hitch a ride. We usually split the cost for gas and then it
was affordable for everyone, but you needed a whole day.

Later I lived in Zuid Limburg and with a stiff bicycle ride you could
haul stuff home from the surplus dealer in Margraten. Wrecked many
baggage racks that way, plus some chains, axles and so on. And found out
the hard way that bicycle brakes don't work so good with 50 pounds of
stuff on the back.

--
Regards, Joerg

http://www.analogconsultants.com/

"gmail" domain blocked because of excessive spam.
Use another domain or send PM.

 

[John Larkin]

On Tue, 29 Sep 2009 09:11:36 -0700 (PDT), Bill Sloman
<bill.sloman@ieee.org> wrote:

On Sep 29, 2:40 am, dagmargoodb...@yahoo.com wrote:
On Sep 27, 6:37 pm,Bill Sloman<bill.slo...@ieee.org> wrote:

That's not auto calibration, that's just replacing trim pots and screw
drivers with digital pots and an eprom programmer.

Bill you're just being tedious.  Autocalibration is soooo 20th
century--we just don't feel the need to discuss it.  That doesn't mean
we don't do it.

You may do it as a matter of routine, although your personal database
doesn't show much sign of having been up-dated recently. John Larkin
doesn't seem to be entirely at home with the concept.

I'll do whatever works. Lately we've been moving entire nonlinear
channel calibration algorithms into FPGAs. But I'm not "entirely at
home" with building primary standards into measuring instruments, or
taking them offline for self-test or recal without an explicit command
from the user to do so. Even if I could do that transparently, my
customers *really* wouldn't like their gains an offsets being changed
invisibly, mid-run.

That's the problem having customers, I guess. It must be be very
liberating to have no customers.

Some customers need certified data: confirm cal before a run, take
data, confirm cal after. The idea of continuous calibration is messy
there. The only things you might get away with would be tweaking
dimensionless things, like auto-zero or some such.

Our newer VME modules have a relay per channel and a test connector
(upper D9 in this case)

http://www.highlandtechnology.com/DSS/V450DS.html

so the customer can bus all the test connectors to a
tracable-calibrated DVM or whatever. He can pull in a relay and route
the channel to the cal instrument without disconnecting the field
wiring, making it a software-only thing to verify the cal of the
entire system, every morning if he wants. Why use relays? Because
Pratt&Whitney told us to use relays.

John

 

[John Larkin]

On Tue, 29 Sep 2009 09:25:15 -0700, Joerg <invalid@invalid.invalid>
wrote:

John Larkin wrote:
On Mon, 28 Sep 2009 17:43:22 -0700, Joerg <invalid@invalid.invalid
wrote:

John Larkin wrote:
On Mon, 28 Sep 2009 20:05:23 -0400, Phil Hobbs
pcdhSpamMeSenseless@electrooptical.net> wrote:

John Fields wrote:
On Mon, 28 Sep 2009 10:25:05 -0700, John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:

On Sat, 26 Sep 2009 17:58:27 -0700, Archimedes' Lever
OneBigLever@InfiniteSeries.Org> wrote:

On Sat, 26 Sep 2009 16:52:40 -0700, John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:

On Sat, 26 Sep 2009 17:28:50 -0400, "Michael A. Terrell"
mike.terrell@earthlink.net> wrote:

John Larkin wrote:
There's the slideback technique: drive a comparator with RF on one
side, DC feedback on the other. Tease the DC appropriately.

I once made a slideback sampling oscilloscope, using tunnel diodes, as
my EE senior project. I won an award and had to attend a dreadful IEEE
chapter banquet and repeat it to a bunch of old-fart power engineers
who didn't understand a word I said. I described the slideback
sampling scope in this ng some years back and a certain party loved
the idea so much he later decided that he'd invented it himself.
http://store.americanmicrosemiconductor.com/diodes-tunnel-diodes.html
TDs are insanely expensive nowadays, ballpark $100. I used to get them
for a couple bucks from Allied. The fabrication process is insane, and
nobody ever modernized it.

There are some more modern planar germanium back diodes, essentially
low Ip tunnel diodes, but they're RF detectors, useless for switching.
Pity, I used to like tunnel diodes.

http://aeroflex.com/AMS/Metelics/pdfiles/MBD_Series_Planar_Back_Tunnel_Diodes.pdf

John
Try PiN diodes then.
For what? Certainly not switching, amplifying, oscillating, detection,
or mixing.
---
Re. switching, From:

http://en.wikipedia.org/wiki/PIN_diode

"Under zero or reverse bias, a PIN diode has a low capacitance. The low
capacitance will not pass much of an RF signal. Under a forward bias of
1 mA, a typical PIN diode will have an RF resistance of about 1 ohm,
making it a good RF conductor. Consequently, the PIN diode makes a good
RF switch."
---
Good, but not fast. PIN diodes specialize in having a lot of stored
charge, so that the signal current can be quite a bit larger than the DC
current without causing excessive distortion.

Cheers

Phil Hobbs
PINs stop behaving like PINs at low frequencies, too. So they don't
make useful wideband switches.

Got to watch the carrier lifetime. The lower the bottom of your spectrum
and the higher the RF current, the longer its carrier lifetime must be.
I found PIN diodes to be great and most of all cheap variable
attenuators as well as switched. Designed in tons of them.


But I meant active switching when I was referring to a TD. A TD would
*generate* a fast step from an arbitrarily slow drive.

I've drooled over SRDs all my life and every time I wanted to buy one I
either couldn't have one or it was outlandishly expensive. Guess
avalanching is the only game in town and if you want avalanche-rated
then a bone-simple BJT can easily shoot up to twenty bucks.

SRDs aren't hard to get. MA/Com has distributor parts, under a buck.
M-Pulse and Metelics are good about samples. If you want a few, send
me a SASE.

Oh, here it is...

229-1769 DIO SRD 30V SOT23 150PS MA44769 1PF

MA44769-287 PENSTOCK

Price 58 cents in small quantities.

They also have MA44767-287, 600 ps risetime, a little easier to drive
because it stores more charge.

These make nice edge generators and frequency multipliers. I have a
rubidium clock that generates the 6.3846826128 GHz frequency from a 10
MHz rock with an absurdly small number of cheap parts.


Thanks, John! That's a decent price. And thanks for the SASE offer, but
maybe I'll combine that with a beer at Zeitgeist when I get down there

Well, drop in. We have a zillion exotic parts in stock. And the
quality of Z's burgers has improved radically lately. Only biker bar I
know of with Chimay on tap.

As a kid I grew up in Europe and back then such exotic parts were very
hard to find over there, even at hamfests.

We were lucky. Tons of exotic surplus gear, lots of old teevees,
Allied and Lafayette and Fair Radio Sales mail-order available to
anyone, local distributors for over-the-counter transistors and
10-turn pots and such... the counter guys gave me more parts than I
ever paid for. I made a deal with my parents to dump my allowance in
favor of a revolving credit account with Allied, so I could just order
stuff. I made spending money fixing radios and TVs.

John

 

[John Larkin]

On Tue, 29 Sep 2009 11:22:32 +0200, Rene Tschaggelar <none@none.net>
wrote:

Jim Thompson wrote:
Anyone have clever ideas for rectifying a 500MHz sine wave, amplitude
say 50mV to 500mV peak-to-peak?

Half wave is OK.

1mV accuracy is needed :-(

Process is X-Fab XB06.

Thanks!

...Jim Thompson

There are zero-bias diodes available up to at
least Xband (10GHz). They have a sensitivity
of in the order of -55dBm

I recently got some for 30 bucks each.

Rene

Try Skyworks. Similar parts for under a buck.

John

 

[John Larkin]

On Mon, 28 Sep 2009 17:41:55 -0700, "RST Engineering - JIm"
<jweir43@gmail.com> wrote:

Is your job application online?

{;-)

Jim


"John Larkin" <jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in message
news:95k2c59k4o6ms80sp3akflfghdeodfeg2d@4ax.com...


All our boards are assembled
by naked young girls sitting in tubs of tepid water. That seems to
work pretty well.

John

Only to bottom-posters.

John

 

[Jan Panteltje]

On a sunny day (Tue, 29 Sep 2009 09:34:08 -0700) it happened Joerg
<invalid@invalid.invalid> wrote in <7ier86F30e1vkU1@mid.individual.net>:

UJTs are cool.


Well, yeah, but you probably lived in the Netherlands as a kid. You guys
had dump handelaars and all sorts of electronics places. UJTs were
unobtanium in Germany. Once in a while we'd mount a car and head over
the border. But since I was a kid back then and didn't have my own car
I'd have to hitch a ride. We usually split the cost for gas and then it
was affordable for everyone, but you needed a whole day.

Later I lived in Zuid Limburg and with a stiff bicycle ride you could
haul stuff home from the surplus dealer in Margraten. Wrecked many
baggage racks that way, plus some chains, axles and so on. And found out
the hard way that bicycle brakes don't work so good with 50 pounds of
stuff on the back.

Still widely available, I used the 2N2646:
http://nl.farnell.com/unijunction-transistors-ujt

 

[Phil Hobbs]

Jan Panteltje wrote:

On a sunny day (Tue, 29 Sep 2009 09:34:08 -0700) it happened Joerg
invalid@invalid.invalid> wrote in <7ier86F30e1vkU1@mid.individual.net>:

UJTs are cool.

Well, yeah, but you probably lived in the Netherlands as a kid. You guys
had dump handelaars and all sorts of electronics places. UJTs were
unobtanium in Germany. Once in a while we'd mount a car and head over
the border. But since I was a kid back then and didn't have my own car
I'd have to hitch a ride. We usually split the cost for gas and then it
was affordable for everyone, but you needed a whole day.

Later I lived in Zuid Limburg and with a stiff bicycle ride you could
haul stuff home from the surplus dealer in Margraten. Wrecked many
baggage racks that way, plus some chains, axles and so on. And found out
the hard way that bicycle brakes don't work so good with 50 pounds of
stuff on the back.

Still widely available, I used the 2N2646:
http://nl.farnell.com/unijunction-transistors-ujt

I like PUTs for things like laser interlocks. Unlike ICs, I know
exactly how they'll behave in fault conditions, which matters a lot.
Relays are good too.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal
ElectroOptical Innovations
55 Orchard Rd
Briarcliff Manor NY 10510
845-480-2058
hobbs at electrooptical dot net
http://electrooptical.net

 

[Phil Hobbs]

John Larkin wrote:

On Tue, 29 Sep 2009 09:25:15 -0700, Joerg <invalid@invalid.invalid
wrote:

John Larkin wrote:
On Mon, 28 Sep 2009 17:43:22 -0700, Joerg <invalid@invalid.invalid
wrote:

John Larkin wrote:
On Mon, 28 Sep 2009 20:05:23 -0400, Phil Hobbs
pcdhSpamMeSenseless@electrooptical.net> wrote:

John Fields wrote:
On Mon, 28 Sep 2009 10:25:05 -0700, John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:

On Sat, 26 Sep 2009 17:58:27 -0700, Archimedes' Lever
OneBigLever@InfiniteSeries.Org> wrote:

On Sat, 26 Sep 2009 16:52:40 -0700, John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:

On Sat, 26 Sep 2009 17:28:50 -0400, "Michael A. Terrell"
mike.terrell@earthlink.net> wrote:

John Larkin wrote:
There's the slideback technique: drive a comparator with RF on one
side, DC feedback on the other. Tease the DC appropriately.

I once made a slideback sampling oscilloscope, using tunnel diodes, as
my EE senior project. I won an award and had to attend a dreadful IEEE
chapter banquet and repeat it to a bunch of old-fart power engineers
who didn't understand a word I said. I described the slideback
sampling scope in this ng some years back and a certain party loved
the idea so much he later decided that he'd invented it himself.
http://store.americanmicrosemiconductor.com/diodes-tunnel-diodes.html
TDs are insanely expensive nowadays, ballpark $100. I used to get them
for a couple bucks from Allied. The fabrication process is insane, and
nobody ever modernized it.

There are some more modern planar germanium back diodes, essentially
low Ip tunnel diodes, but they're RF detectors, useless for switching.
Pity, I used to like tunnel diodes.

http://aeroflex.com/AMS/Metelics/pdfiles/MBD_Series_Planar_Back_Tunnel_Diodes.pdf

John
Try PiN diodes then.
For what? Certainly not switching, amplifying, oscillating, detection,
or mixing.
---
Re. switching, From:

http://en.wikipedia.org/wiki/PIN_diode

"Under zero or reverse bias, a PIN diode has a low capacitance. The low
capacitance will not pass much of an RF signal. Under a forward bias of
1 mA, a typical PIN diode will have an RF resistance of about 1 ohm,
making it a good RF conductor. Consequently, the PIN diode makes a good
RF switch."
---
Good, but not fast. PIN diodes specialize in having a lot of stored
charge, so that the signal current can be quite a bit larger than the DC
current without causing excessive distortion.

Cheers

Phil Hobbs
PINs stop behaving like PINs at low frequencies, too. So they don't
make useful wideband switches.

Got to watch the carrier lifetime. The lower the bottom of your spectrum
and the higher the RF current, the longer its carrier lifetime must be.
I found PIN diodes to be great and most of all cheap variable
attenuators as well as switched. Designed in tons of them.


But I meant active switching when I was referring to a TD. A TD would
*generate* a fast step from an arbitrarily slow drive.

I've drooled over SRDs all my life and every time I wanted to buy one I
either couldn't have one or it was outlandishly expensive. Guess
avalanching is the only game in town and if you want avalanche-rated
then a bone-simple BJT can easily shoot up to twenty bucks.
SRDs aren't hard to get. MA/Com has distributor parts, under a buck.
M-Pulse and Metelics are good about samples. If you want a few, send
me a SASE.

Oh, here it is...

229-1769 DIO SRD 30V SOT23 150PS MA44769 1PF

MA44769-287 PENSTOCK

Price 58 cents in small quantities.

They also have MA44767-287, 600 ps risetime, a little easier to drive
because it stores more charge.

These make nice edge generators and frequency multipliers. I have a
rubidium clock that generates the 6.3846826128 GHz frequency from a 10
MHz rock with an absurdly small number of cheap parts.

Thanks, John! That's a decent price. And thanks for the SASE offer, but
maybe I'll combine that with a beer at Zeitgeist when I get down there

Well, drop in. We have a zillion exotic parts in stock. And the
quality of Z's burgers has improved radically lately. Only biker bar I
know of with Chimay on tap.

As a kid I grew up in Europe and back then such exotic parts were very
hard to find over there, even at hamfests.

We were lucky. Tons of exotic surplus gear, lots of old teevees,
Allied and Lafayette and Fair Radio Sales mail-order available to
anyone, local distributors for over-the-counter transistors and
10-turn pots and such... the counter guys gave me more parts than I
ever paid for. I made a deal with my parents to dump my allowance in
favor of a revolving credit account with Allied, so I could just order
stuff. I made spending money fixing radios and TVs.

John

Still not as good as now. I just bought an excellent-condition HP 8568B
spectrum analyzer for $900. About 2 cents on the dollar. So far this
year I've bought test equipment that would have cost way over $100000
new, for probably $4k altogether. Amazing.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal
ElectroOptical Innovations
55 Orchard Rd
Briarcliff Manor NY 10510
845-480-2058
hobbs at electrooptical dot net
http://electrooptical.net

 

[Tim Shoppa]

On Sep 28, 11:07 pm, "Speeders & Drunk Drivers are MURDERERS"
<xeton2...@yahoo.com> wrote:

Thanks for your diarrhea, but you should throw away your worthless PE since it doesn't serve you anything.  I'm more advanced than you dumbasses in theories and in practices, I've seen your funky math, you haven't seen mine, we are for sure very different in way we do thing, mine yields high and accurate result, yours is confusing to yourself and others like hell.  I'm an Alien from other planets, my spaceships move lightning fast, why you dumbasses like to give advice to your doctors huh?

All your base are belong to us!

Tim.

 

[Joerg]

Phil Hobbs wrote:

John Larkin wrote:
On Tue, 29 Sep 2009 09:25:15 -0700, Joerg <invalid@invalid.invalid
wrote:

John Larkin wrote:

[...]

Oh, here it is...

229-1769 DIO SRD 30V SOT23 150PS MA44769 1PF

MA44769-287 PENSTOCK

Price 58 cents in small quantities.

They also have MA44767-287, 600 ps risetime, a little easier to drive
because it stores more charge.

These make nice edge generators and frequency multipliers. I have a
rubidium clock that generates the 6.3846826128 GHz frequency from a 10
MHz rock with an absurdly small number of cheap parts.

Thanks, John! That's a decent price. And thanks for the SASE offer,
but maybe I'll combine that with a beer at Zeitgeist when I get down
there

Well, drop in. We have a zillion exotic parts in stock. And the
quality of Z's burgers has improved radically lately. Only biker bar I
know of with Chimay on tap.

Burgers and Chimay on tap? My kind of bar, have to get down there.

As a kid I grew up in Europe and back then such exotic parts were
very hard to find over there, even at hamfests.

We were lucky. Tons of exotic surplus gear, lots of old teevees,
Allied and Lafayette and Fair Radio Sales mail-order available to
anyone, local distributors for over-the-counter transistors and
10-turn pots and such... the counter guys gave me more parts than I
ever paid for. I made a deal with my parents to dump my allowance in
favor of a revolving credit account with Allied, so I could just order
stuff. I made spending money fixing radios and TVs.

Same here, fixing stuff. Provided more learning experience than many
university courses. And some money or beer, you didn't have to wait
until 21 for that in Europe

John


Still not as good as now. I just bought an excellent-condition HP 8568B
spectrum analyzer for $900. About 2 cents on the dollar. So far this
year I've bought test equipment that would have cost way over $100000
new, for probably $4k altogether. Amazing.

Also Digikey. Even the places John mentioned probably didn't have quite
that selection. Nowadays you can buy a xxGHz BJT for a buck. Which BTW
can also be used to gussy up a transition by a lot. OTOH the dire parts
situation back then taught me lots of tricks and most of all, discrete
design. Opamps of known origin cost several Dollars. You could get
opamps of not so noble origin ("Fell off the truck" brands) for under a
buck but that was really frustrating because you never knew what
deficiency they'd exhibit. So I stuck with transistors because they
worked. You just had to stay away from those bag-o-ten "Universal NPN
transistors".

--
Regards, Joerg

http://www.analogconsultants.com/

"gmail" domain blocked because of excessive spam.
Use another domain or send PM.

 

[Joerg]

Phil Hobbs wrote:

Jan Panteltje wrote:
On a sunny day (Tue, 29 Sep 2009 09:34:08 -0700) it happened Joerg
invalid@invalid.invalid> wrote in <7ier86F30e1vkU1@mid.individual.net>:

UJTs are cool.

Well, yeah, but you probably lived in the Netherlands as a kid. You
guys had dump handelaars and all sorts of electronics places. UJTs
were unobtanium in Germany. Once in a while we'd mount a car and head
over the border. But since I was a kid back then and didn't have my
own car I'd have to hitch a ride. We usually split the cost for gas
and then it was affordable for everyone, but you needed a whole day.

Later I lived in Zuid Limburg and with a stiff bicycle ride you could
haul stuff home from the surplus dealer in Margraten. Wrecked many
baggage racks that way, plus some chains, axles and so on. And found
out the hard way that bicycle brakes don't work so good with 50
pounds of stuff on the back.

Still widely available, I used the 2N2646:
http://nl.farnell.com/unijunction-transistors-ujt

I like PUTs for things like laser interlocks. Unlike ICs, I know
exactly how they'll behave in fault conditions, which matters a lot.
Relays are good too.

Thanks. AFAICT the 2646 has long since been obsoleted, maybe still
considered by boutique mfgs. When I was young I was always told "We can
order it but that'll really cost ya". I didn't know you could still get
the 6027 although the fact that it was never migrated to SMT doesn't
bode well for its future.

Personally I have never seen a design that contained a UJT, this
technology may have played chicken and egg for too long.

--
Regards, Joerg

http://www.analogconsultants.com/

"gmail" domain blocked because of excessive spam.
Use another domain or send PM.

 

[Bill Sloman]

On Sep 29, 2:40 am, dagmargoodb...@yahoo.com wrote:

On Sep 27, 6:37 pm,Bill Sloman<bill.slo...@ieee.org> wrote:

That's not auto calibration, that's just replacing trim pots and screw
drivers with digital pots and an eprom programmer.

Bill you're just being tedious.  Autocalibration is soooo 20th
century--we just don't feel the need to discuss it.  That doesn't mean
we don't do it.

You may do it as a matter of routine, although your personal database
doesn't show much sign of having been up-dated recently. John Larkin
doesn't seem to be entirely at home with the concept.

--
Bill Sloman, Nijmegen

 

[Tim Shoppa]

On Sep 28, 3:22 am, "Speeders & Drunk Drivers are MURDERERS"
<xeton2...@yahoo.com> wrote:

"John Fields" <jfie...@austininstruments.com> wrote in messagenews:6opvb5l27upk1u2ut4qpokhr586j3dlmdh@4ax.com...
On Sat, 26 Sep 2009 17:48:21 -0700, Archimedes' Lever
OneBigLe...@InfiniteSeries.Org> wrote:

On Sat, 26 Sep 2009 15:51:08 -0700, "Speeders & Drunk Drivers are
MURDERERS" <xeton2...@yahoo.com> wrote:

BULLSHIT!  My MOSFET's went even farther than this shit, yup mine are in sub NanoOhm.  No heat, they blow my 36V 150watts light bulbs twice, no heat on the MOSFET, no death affect like your MOSFETs under constant current.   A thumb size TO-220 can produce 1.2kw of switching power.

NXP claims world's first sub 1 milliOhm MOSFET in a Power S08 ...

Jul 8, 2009 ... NXP Semiconductors has unveiled the world's first n-channel sub 1 milliOhm 25 V MOSFET, PSMN1R2-25YL, and is claiming the lowest ever RDSon ...

 YOUR MOSFETs (no apostrophe, idiot)?

 What company do YOU make or design MOSFETs for?

 Otherwise, it is you that is full of shit.

---
Indeed.

Just thinking about what he's proposing against what can actually be
done with ohmic material leads to the conclusion that he is, indeed,
full of shit.

Here are the proofs of why you jerks are real stupid:

1) You believe in something that you shouldn't be believing such as the hype of the new Chevy Volt 200 MPG, Even a light hybrid Honda/Toyota hybrid can't make it above 50mpg especially under your fat asses, you got to do some trick to go above 50mpg.  Now a new heavy weight called Volt claiming to hit 200mpg, that's the real shit there.  

2) What happens to your hype to send men to Mars in 2004 by your fucking BUSH?  See, the whole thing is dead like I said back then.

3) I have tangible truth about everything I said here, it's your own problem for lacking education.  You have nothing but bogus formulas, stupid beliefs in bogus things such as WMD in Iraq, Rosy economy, then the whole thing collapse.  That's why I never care to give you respect.  You judgments are so dirt low as usual.   I would be stupid if I reveal anything new to you in technologies..

NOW FLUSH ALL OF YOU LOW-LIFE AMERICAN JERKS!!

Captain: What in the hell happened?
Mechanic: Somebody set up us the bomb.
Engineer: An unknown assailant has planted an explosive device!
Operator: We get signal.
Communication operator: Captain! We have received a transmission!
Captain: What ! Captain: What?!
CATS: All your base are belong to us. CATS: With the help of the
Federation Government forces, CATS has taken all of your bases.
CATS: You are on the way to destruction. CATS: Your ship is about to
meet its doom as well.
Captain: What you say !! Captain: I—It can't be...!
CATS: You have no chance to survive make your time. CATS: Cherish
these few remaining seconds of your lives.
Captain: For great justice. Captain: Our hopes for our future ...

 

[John Larkin]

On Tue, 29 Sep 2009 13:34:14 -0400, Phil Hobbs
<pcdhSpamMeSenseless@electrooptical.net> wrote:

John Larkin wrote:
On Tue, 29 Sep 2009 09:25:15 -0700, Joerg <invalid@invalid.invalid
wrote:

John Larkin wrote:
On Mon, 28 Sep 2009 17:43:22 -0700, Joerg <invalid@invalid.invalid
wrote:

John Larkin wrote:
On Mon, 28 Sep 2009 20:05:23 -0400, Phil Hobbs
pcdhSpamMeSenseless@electrooptical.net> wrote:

John Fields wrote:
On Mon, 28 Sep 2009 10:25:05 -0700, John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:

On Sat, 26 Sep 2009 17:58:27 -0700, Archimedes' Lever
OneBigLever@InfiniteSeries.Org> wrote:

On Sat, 26 Sep 2009 16:52:40 -0700, John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:

On Sat, 26 Sep 2009 17:28:50 -0400, "Michael A. Terrell"
mike.terrell@earthlink.net> wrote:

John Larkin wrote:
There's the slideback technique: drive a comparator with RF on one
side, DC feedback on the other. Tease the DC appropriately.

I once made a slideback sampling oscilloscope, using tunnel diodes, as
my EE senior project. I won an award and had to attend a dreadful IEEE
chapter banquet and repeat it to a bunch of old-fart power engineers
who didn't understand a word I said. I described the slideback
sampling scope in this ng some years back and a certain party loved
the idea so much he later decided that he'd invented it himself.
http://store.americanmicrosemiconductor.com/diodes-tunnel-diodes.html
TDs are insanely expensive nowadays, ballpark $100. I used to get them
for a couple bucks from Allied. The fabrication process is insane, and
nobody ever modernized it.

There are some more modern planar germanium back diodes, essentially
low Ip tunnel diodes, but they're RF detectors, useless for switching.
Pity, I used to like tunnel diodes.

http://aeroflex.com/AMS/Metelics/pdfiles/MBD_Series_Planar_Back_Tunnel_Diodes.pdf

John
Try PiN diodes then.
For what? Certainly not switching, amplifying, oscillating, detection,
or mixing.
---
Re. switching, From:

http://en.wikipedia.org/wiki/PIN_diode

"Under zero or reverse bias, a PIN diode has a low capacitance. The low
capacitance will not pass much of an RF signal. Under a forward bias of
1 mA, a typical PIN diode will have an RF resistance of about 1 ohm,
making it a good RF conductor. Consequently, the PIN diode makes a good
RF switch."
---
Good, but not fast. PIN diodes specialize in having a lot of stored
charge, so that the signal current can be quite a bit larger than the DC
current without causing excessive distortion.

Cheers

Phil Hobbs
PINs stop behaving like PINs at low frequencies, too. So they don't
make useful wideband switches.

Got to watch the carrier lifetime. The lower the bottom of your spectrum
and the higher the RF current, the longer its carrier lifetime must be.
I found PIN diodes to be great and most of all cheap variable
attenuators as well as switched. Designed in tons of them.


But I meant active switching when I was referring to a TD. A TD would
*generate* a fast step from an arbitrarily slow drive.

I've drooled over SRDs all my life and every time I wanted to buy one I
either couldn't have one or it was outlandishly expensive. Guess
avalanching is the only game in town and if you want avalanche-rated
then a bone-simple BJT can easily shoot up to twenty bucks.
SRDs aren't hard to get. MA/Com has distributor parts, under a buck.
M-Pulse and Metelics are good about samples. If you want a few, send
me a SASE.

Oh, here it is...

229-1769 DIO SRD 30V SOT23 150PS MA44769 1PF

MA44769-287 PENSTOCK

Price 58 cents in small quantities.

They also have MA44767-287, 600 ps risetime, a little easier to drive
because it stores more charge.

These make nice edge generators and frequency multipliers. I have a
rubidium clock that generates the 6.3846826128 GHz frequency from a 10
MHz rock with an absurdly small number of cheap parts.

Thanks, John! That's a decent price. And thanks for the SASE offer, but
maybe I'll combine that with a beer at Zeitgeist when I get down there

Well, drop in. We have a zillion exotic parts in stock. And the
quality of Z's burgers has improved radically lately. Only biker bar I
know of with Chimay on tap.

As a kid I grew up in Europe and back then such exotic parts were very
hard to find over there, even at hamfests.

We were lucky. Tons of exotic surplus gear, lots of old teevees,
Allied and Lafayette and Fair Radio Sales mail-order available to
anyone, local distributors for over-the-counter transistors and
10-turn pots and such... the counter guys gave me more parts than I
ever paid for. I made a deal with my parents to dump my allowance in
favor of a revolving credit account with Allied, so I could just order
stuff. I made spending money fixing radios and TVs.

John


Still not as good as now. I just bought an excellent-condition HP 8568B
spectrum analyzer for $900. About 2 cents on the dollar. So far this
year I've bought test equipment that would have cost way over $100000
new, for probably $4k altogether. Amazing.

Cheers

Phil Hobbs

And I'm looking at, theoretically, a quarter million dollars worth of
sampling heads over there on my shelf. This is an amazing time to
start a niche business, or even an exotic hobby.

John

 

[John Larkin]

On Tue, 29 Sep 2009 10:56:28 -0700, Joerg <invalid@invalid.invalid>
wrote:

Phil Hobbs wrote:
John Larkin wrote:
On Tue, 29 Sep 2009 09:25:15 -0700, Joerg <invalid@invalid.invalid
wrote:

John Larkin wrote:

[...]

Oh, here it is...

229-1769 DIO SRD 30V SOT23 150PS MA44769 1PF

MA44769-287 PENSTOCK

Price 58 cents in small quantities.

They also have MA44767-287, 600 ps risetime, a little easier to drive
because it stores more charge.

These make nice edge generators and frequency multipliers. I have a
rubidium clock that generates the 6.3846826128 GHz frequency from a 10
MHz rock with an absurdly small number of cheap parts.

Thanks, John! That's a decent price. And thanks for the SASE offer,
but maybe I'll combine that with a beer at Zeitgeist when I get down
there

Well, drop in. We have a zillion exotic parts in stock. And the
quality of Z's burgers has improved radically lately. Only biker bar I
know of with Chimay on tap.


Burgers and Chimay on tap? My kind of bar, have to get down there.


As a kid I grew up in Europe and back then such exotic parts were
very hard to find over there, even at hamfests.

We were lucky. Tons of exotic surplus gear, lots of old teevees,
Allied and Lafayette and Fair Radio Sales mail-order available to
anyone, local distributors for over-the-counter transistors and
10-turn pots and such... the counter guys gave me more parts than I
ever paid for. I made a deal with my parents to dump my allowance in
favor of a revolving credit account with Allied, so I could just order
stuff. I made spending money fixing radios and TVs.


Same here, fixing stuff. Provided more learning experience than many
university courses. And some money or beer, you didn't have to wait
until 21 for that in Europe

Didn't in New Orleans, either!

John

 

[Phil Hobbs]

John Larkin wrote:

On Tue, 29 Sep 2009 13:34:14 -0400, Phil Hobbs
pcdhSpamMeSenseless@electrooptical.net> wrote:

John Larkin wrote:
On Tue, 29 Sep 2009 09:25:15 -0700, Joerg <invalid@invalid.invalid
wrote:

John Larkin wrote:
On Mon, 28 Sep 2009 17:43:22 -0700, Joerg <invalid@invalid.invalid
wrote:

John Larkin wrote:
On Mon, 28 Sep 2009 20:05:23 -0400, Phil Hobbs
pcdhSpamMeSenseless@electrooptical.net> wrote:

John Fields wrote:
On Mon, 28 Sep 2009 10:25:05 -0700, John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:

On Sat, 26 Sep 2009 17:58:27 -0700, Archimedes' Lever
OneBigLever@InfiniteSeries.Org> wrote:

On Sat, 26 Sep 2009 16:52:40 -0700, John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:

On Sat, 26 Sep 2009 17:28:50 -0400, "Michael A. Terrell"
mike.terrell@earthlink.net> wrote:

John Larkin wrote:
There's the slideback technique: drive a comparator with RF on one
side, DC feedback on the other. Tease the DC appropriately.

I once made a slideback sampling oscilloscope, using tunnel diodes, as
my EE senior project. I won an award and had to attend a dreadful IEEE
chapter banquet and repeat it to a bunch of old-fart power engineers
who didn't understand a word I said. I described the slideback
sampling scope in this ng some years back and a certain party loved
the idea so much he later decided that he'd invented it himself.
http://store.americanmicrosemiconductor.com/diodes-tunnel-diodes.html
TDs are insanely expensive nowadays, ballpark $100. I used to get them
for a couple bucks from Allied. The fabrication process is insane, and
nobody ever modernized it.

There are some more modern planar germanium back diodes, essentially
low Ip tunnel diodes, but they're RF detectors, useless for switching.
Pity, I used to like tunnel diodes.

http://aeroflex.com/AMS/Metelics/pdfiles/MBD_Series_Planar_Back_Tunnel_Diodes.pdf

John
Try PiN diodes then.
For what? Certainly not switching, amplifying, oscillating, detection,
or mixing.
---
Re. switching, From:

http://en.wikipedia.org/wiki/PIN_diode

"Under zero or reverse bias, a PIN diode has a low capacitance. The low
capacitance will not pass much of an RF signal. Under a forward bias of
1 mA, a typical PIN diode will have an RF resistance of about 1 ohm,
making it a good RF conductor. Consequently, the PIN diode makes a good
RF switch."
---
Good, but not fast. PIN diodes specialize in having a lot of stored
charge, so that the signal current can be quite a bit larger than the DC
current without causing excessive distortion.

Cheers

Phil Hobbs
PINs stop behaving like PINs at low frequencies, too. So they don't
make useful wideband switches.

Got to watch the carrier lifetime. The lower the bottom of your spectrum
and the higher the RF current, the longer its carrier lifetime must be.
I found PIN diodes to be great and most of all cheap variable
attenuators as well as switched. Designed in tons of them.


But I meant active switching when I was referring to a TD. A TD would
*generate* a fast step from an arbitrarily slow drive.

I've drooled over SRDs all my life and every time I wanted to buy one I
either couldn't have one or it was outlandishly expensive. Guess
avalanching is the only game in town and if you want avalanche-rated
then a bone-simple BJT can easily shoot up to twenty bucks.
SRDs aren't hard to get. MA/Com has distributor parts, under a buck.
M-Pulse and Metelics are good about samples. If you want a few, send
me a SASE.

Oh, here it is...

229-1769 DIO SRD 30V SOT23 150PS MA44769 1PF

MA44769-287 PENSTOCK

Price 58 cents in small quantities.

They also have MA44767-287, 600 ps risetime, a little easier to drive
because it stores more charge.

These make nice edge generators and frequency multipliers. I have a
rubidium clock that generates the 6.3846826128 GHz frequency from a 10
MHz rock with an absurdly small number of cheap parts.

Thanks, John! That's a decent price. And thanks for the SASE offer, but
maybe I'll combine that with a beer at Zeitgeist when I get down there
Well, drop in. We have a zillion exotic parts in stock. And the
quality of Z's burgers has improved radically lately. Only biker bar I
know of with Chimay on tap.

As a kid I grew up in Europe and back then such exotic parts were very
hard to find over there, even at hamfests.
We were lucky. Tons of exotic surplus gear, lots of old teevees,
Allied and Lafayette and Fair Radio Sales mail-order available to
anyone, local distributors for over-the-counter transistors and
10-turn pots and such... the counter guys gave me more parts than I
ever paid for. I made a deal with my parents to dump my allowance in
favor of a revolving credit account with Allied, so I could just order
stuff. I made spending money fixing radios and TVs.

John

Still not as good as now. I just bought an excellent-condition HP 8568B
spectrum analyzer for $900. About 2 cents on the dollar. So far this
year I've bought test equipment that would have cost way over $100000
new, for probably $4k altogether. Amazing.

Cheers

Phil Hobbs

And I'm looking at, theoretically, a quarter million dollars worth of
sampling heads over there on my shelf. This is an amazing time to
start a niche business, or even an exotic hobby.

John

Funny you should mention that.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal
ElectroOptical Innovations
55 Orchard Rd
Briarcliff Manor NY 10510
845-480-2058
hobbs at electrooptical dot net
http://electrooptical.net

 

[Phil Hobbs]

Joerg wrote:

Phil Hobbs wrote:
Jan Panteltje wrote:
On a sunny day (Tue, 29 Sep 2009 09:34:08 -0700) it happened Joerg
invalid@invalid.invalid> wrote in <7ier86F30e1vkU1@mid.individual.net>:

UJTs are cool.

Well, yeah, but you probably lived in the Netherlands as a kid. You
guys had dump handelaars and all sorts of electronics places. UJTs
were unobtanium in Germany. Once in a while we'd mount a car and
head over the border. But since I was a kid back then and didn't
have my own car I'd have to hitch a ride. We usually split the cost
for gas and then it was affordable for everyone, but you needed a
whole day.

Later I lived in Zuid Limburg and with a stiff bicycle ride you
could haul stuff home from the surplus dealer in Margraten. Wrecked
many baggage racks that way, plus some chains, axles and so on. And
found out the hard way that bicycle brakes don't work so good with
50 pounds of stuff on the back.

Still widely available, I used the 2N2646:
http://nl.farnell.com/unijunction-transistors-ujt

I like PUTs for things like laser interlocks. Unlike ICs, I know
exactly how they'll behave in fault conditions, which matters a lot.
Relays are good too.


Thanks. AFAICT the 2646 has long since been obsoleted, maybe still
considered by boutique mfgs. When I was young I was always told "We can
order it but that'll really cost ya". I didn't know you could still get
the 6027 although the fact that it was never migrated to SMT doesn't
bode well for its future.

Personally I have never seen a design that contained a UJT, this
technology may have played chicken and egg for too long.

For my purposes the two-BJT SCR works fine too. Doesn't have to be
fast, just very reliable and predictable.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal
ElectroOptical Innovations
55 Orchard Rd
Briarcliff Manor NY 10510
845-480-2058
hobbs at electrooptical dot net
http://electrooptical.net

 

[Rene Tschaggelar]

Jim Thompson wrote:

Has anyone found a good (pay-for-service) Usenet provider?

Cox is up and down like a Yo-Yo, and Agent's APN (apparently using
Easynews) is becoming flakier and flakier... lots of talk, "Working on
it", but no "do". I no longer recommend them :-(

...Jim Thompson

Two of my ISPs dumped usenet recently.
I'm with teranews. It works.

Rene

 

[Joerg]

John Larkin wrote:

On Tue, 29 Sep 2009 13:34:14 -0400, Phil Hobbs
pcdhSpamMeSenseless@electrooptical.net> wrote:

John Larkin wrote:
On Tue, 29 Sep 2009 09:25:15 -0700, Joerg <invalid@invalid.invalid
wrote:

John Larkin wrote:
On Mon, 28 Sep 2009 17:43:22 -0700, Joerg <invalid@invalid.invalid
wrote:

John Larkin wrote:
On Mon, 28 Sep 2009 20:05:23 -0400, Phil Hobbs
pcdhSpamMeSenseless@electrooptical.net> wrote:

John Fields wrote:
On Mon, 28 Sep 2009 10:25:05 -0700, John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:

On Sat, 26 Sep 2009 17:58:27 -0700, Archimedes' Lever
OneBigLever@InfiniteSeries.Org> wrote:

On Sat, 26 Sep 2009 16:52:40 -0700, John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:

On Sat, 26 Sep 2009 17:28:50 -0400, "Michael A. Terrell"
mike.terrell@earthlink.net> wrote:

John Larkin wrote:
There's the slideback technique: drive a comparator with RF on one
side, DC feedback on the other. Tease the DC appropriately.

I once made a slideback sampling oscilloscope, using tunnel diodes, as
my EE senior project. I won an award and had to attend a dreadful IEEE
chapter banquet and repeat it to a bunch of old-fart power engineers
who didn't understand a word I said. I described the slideback
sampling scope in this ng some years back and a certain party loved
the idea so much he later decided that he'd invented it himself.
http://store.americanmicrosemiconductor.com/diodes-tunnel-diodes.html
TDs are insanely expensive nowadays, ballpark $100. I used to get them
for a couple bucks from Allied. The fabrication process is insane, and
nobody ever modernized it.

There are some more modern planar germanium back diodes, essentially
low Ip tunnel diodes, but they're RF detectors, useless for switching.
Pity, I used to like tunnel diodes.

http://aeroflex.com/AMS/Metelics/pdfiles/MBD_Series_Planar_Back_Tunnel_Diodes.pdf

John
Try PiN diodes then.
For what? Certainly not switching, amplifying, oscillating, detection,
or mixing.
---
Re. switching, From:

http://en.wikipedia.org/wiki/PIN_diode

"Under zero or reverse bias, a PIN diode has a low capacitance. The low
capacitance will not pass much of an RF signal. Under a forward bias of
1 mA, a typical PIN diode will have an RF resistance of about 1 ohm,
making it a good RF conductor. Consequently, the PIN diode makes a good
RF switch."
---
Good, but not fast. PIN diodes specialize in having a lot of stored
charge, so that the signal current can be quite a bit larger than the DC
current without causing excessive distortion.

Cheers

Phil Hobbs
PINs stop behaving like PINs at low frequencies, too. So they don't
make useful wideband switches.

Got to watch the carrier lifetime. The lower the bottom of your spectrum
and the higher the RF current, the longer its carrier lifetime must be.
I found PIN diodes to be great and most of all cheap variable
attenuators as well as switched. Designed in tons of them.


But I meant active switching when I was referring to a TD. A TD would
*generate* a fast step from an arbitrarily slow drive.

I've drooled over SRDs all my life and every time I wanted to buy one I
either couldn't have one or it was outlandishly expensive. Guess
avalanching is the only game in town and if you want avalanche-rated
then a bone-simple BJT can easily shoot up to twenty bucks.
SRDs aren't hard to get. MA/Com has distributor parts, under a buck.
M-Pulse and Metelics are good about samples. If you want a few, send
me a SASE.

Oh, here it is...

229-1769 DIO SRD 30V SOT23 150PS MA44769 1PF

MA44769-287 PENSTOCK

Price 58 cents in small quantities.

They also have MA44767-287, 600 ps risetime, a little easier to drive
because it stores more charge.

These make nice edge generators and frequency multipliers. I have a
rubidium clock that generates the 6.3846826128 GHz frequency from a 10
MHz rock with an absurdly small number of cheap parts.

Thanks, John! That's a decent price. And thanks for the SASE offer, but
maybe I'll combine that with a beer at Zeitgeist when I get down there
Well, drop in. We have a zillion exotic parts in stock. And the
quality of Z's burgers has improved radically lately. Only biker bar I
know of with Chimay on tap.

As a kid I grew up in Europe and back then such exotic parts were very
hard to find over there, even at hamfests.
We were lucky. Tons of exotic surplus gear, lots of old teevees,
Allied and Lafayette and Fair Radio Sales mail-order available to
anyone, local distributors for over-the-counter transistors and
10-turn pots and such... the counter guys gave me more parts than I
ever paid for. I made a deal with my parents to dump my allowance in
favor of a revolving credit account with Allied, so I could just order
stuff. I made spending money fixing radios and TVs.

John

Still not as good as now. I just bought an excellent-condition HP 8568B
spectrum analyzer for $900. About 2 cents on the dollar. So far this
year I've bought test equipment that would have cost way over $100000
new, for probably $4k altogether. Amazing.

Cheers

Phil Hobbs

And I'm looking at, theoretically, a quarter million dollars worth of
sampling heads over there on my shelf. This is an amazing time to
start a niche business, or even an exotic hobby.

Is there anything available at reasonable cost that does zippy sampling
without needing a Goliath of a scope attached to it?

--
Regards, Joerg

http://www.analogconsultants.com/

"gmail" domain blocked because of excessive spam.
Use another domain or send PM.