audio recording on IC -help wanted

On 10 Oct 2004 08:58:48 -0700, w3ase@comcast.net (George Francis)
wrote:

|Hi:
|
|I need two or three 7th overtone xtals for a receiver osc.(2mtrs.) at
|168.315Mc. OR if I put the osc. on the low side of R.F I can use a 5th
|overtone (assuming they can be cut for a fund. above 20Mc.) at a
|frequency of 125.715 Mc. Where can I purchase so few? With miniumum
|delay? The I.F. is 21.3 MC and the repeater is at 147.015 Mc. Thanks,
| GHF

If you don't have any luck locally then Hy-Q might be worth checking
out http://www.hy-q.com.au/crystals/
 
On Sun, 10 Oct 2004 11:33:27 +0100, "R.Lewis" <h.lewis-not this
bit-@connect-2.co.uk> wrote:

|
|"Rich Grise" <null@example.net> wrote in message
|news:Yp_9d.2785$ua2.366@trnddc09...
|> On Saturday 09 October 2004 10:07 am, R.Lewis did deign to grace us with
|the
|> following:
|> ...
|> > Best guess is that re-wiring the plug merely made good a poor contact.
|> > Household mains powered equipment does not have a 'polarity'.
|>
|> Oh, it most certainly does! It's just not "plus" and "minus," it's "hot"
|> and "neutral." Reversing them is a safety issue.
|>
|
|Reversing them is *not* a safety issue.
|American, canadian, australian, japanese & european standards (plus
|presumably many more) all require this to be so and have done for decades.
|


As far as Australia is concerned, I do not agree entirely hwith your
statement...

http://www.accesscomms.com.au/powerplug.htm

If reversal of L and N were not a safety issue then one would expect
that plugs made for the Argentine market would be allowed to be sold
in Australia since they are identical except for the reversed L and N
terminal allocation. As such, Argentine plugs are not allowed in
Australia.

I have often wished that Australia had adopted the much better
designed plug and socket system used in the UK which is inherently
much safer and leaves less chance for wiring mistakes.
 
"Charles L" <tjf00@dodo.com.au> wrote in
news:3f7d58ad@news.comindico.com.au:

Hi,

I would like to hear from anyone who knows has used SOIC 'gull wing'
to DIP converters. Would like to know what they used and where they
can be obtained.

Charles L
Click to expand...
Aries makes a fairly cheap line of these ($7.00). Digikey usually has
them in stock. They are a small pcb with standard dip spaced pins. One
the top of the pcb are pads where you can solder your dip package.
 
Hi Harshana,

Harshana wrote:
I'm looking for a CMOS shift register with following characteristics,
should work on 12V supply,
serial in,
8bit parallel out (all 8bits should be available as outputs),
input low reset
Click to expand...
CD4034 comes to mind....
HTH
Wolfgang



--
From-address is Spam trap
Use: wolfgang (dot) mahringer (at) sbg (dot) at
 
George Francis wrote:
Hi:

I need two or three 7th overtone xtals for a receiver osc.(2mtrs.) at
168.315Mc. OR if I put the osc. on the low side of R.F I can use a 5th
overtone (assuming they can be cut for a fund. above 20Mc.) at a
frequency of 125.715 Mc. Where can I purchase so few? With miniumum
delay? The I.F. is 21.3 MC and the repeater is at 147.015 Mc. Thanks,
GHF
Click to expand...
JAN Crystals in Ft. Myers Florida and ICS in Texas both offer
5th-overtone crystals that may go up to your frequency. The ARRL UHF
Experimenter's handbook mentions a source for 7th-overtone crystals but
I can't remember if you can get custom frequencies.

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com
 
"Geoffrey" <TondeurGeoffrey@Hotmail.com> wrote in message
news:9a33139d.0410102310.4748cded@posting.google.com...
Voior een taak van school moeten wij een discutie starten met een
vraag dus mijn vraag is simpel:

Wat is de kleurencode van weerstanden?
Click to expand...
http://www.moyerelectronics.com/


--
Graham W http://www.gcw.org.uk/ PGM-FI page updated, Graphics Tutorial
WIMBORNE http://www.wessex-astro-society.freeserve.co.uk/ Wessex
Dorset UK Astro Society's Web pages, Info, Meeting Dates, Sites & Maps
Change 'news' to 'sewn' in my Reply address to avoid my spam filter.
 
On Mon, 11 Oct 2004 07:10:22 UTC, TondeurGeoffrey@Hotmail.com
(Geoffrey) wrote:

Wat is de kleurencode van weerstanden?
Click to expand...
Dutch?

If you're asking for the standard resistor colour code

Black = 0
Brown = 1
Red = 2
Orange = 3
Yellow = 4
Green = 5
Blue = 6
Purple = 7
Grey = 8
White = 9

colour bands are read from the band nearest one end. e.g.

orange, blue, red means 3, 6 followed by 2 zeros i.e. 3600 ohms

Hope I've understood the question correctly and that your English is
better than my Dutch.

--
Jim Backus OS/2 user since 1994
bona fide replies to j <dot> backus <the circle thingy> jita <dot>
demon <dot> co <dot> uk
 
On Sun, 10 Oct 2004 11:33:27 +0100, the renowned "R.Lewis"
<h.lewis-not this bit-@connect-2.co.uk> wrote:

"Rich Grise" <null@example.net> wrote in message
news:Yp_9d.2785$ua2.366@trnddc09...
On Saturday 09 October 2004 10:07 am, R.Lewis did deign to grace us with
the
following:
...
Best guess is that re-wiring the plug merely made good a poor contact.
Household mains powered equipment does not have a 'polarity'.

Oh, it most certainly does! It's just not "plus" and "minus," it's "hot"
and "neutral." Reversing them is a safety issue.


Reversing them is *not* a safety issue.
American, canadian, australian, japanese & european standards (plus
presumably many more) all require this to be so and have done for decades.
Click to expand...
If you reverse them you will have a less safe situation with such
things as table lamps (the polarized two-blade plugs put the hot at
the center of the Edison base IIRC, and the SPST switch should break
the hot, not the neutral). You're less likely to get killed changing a
light bulb with the lamp plugged in if the outlet is wired right.

For many situations (for safety purposes) you have to treat the
neutral 'as if' it could be hot, but it's often less safe if you get
it wrong.


Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com
 
Peter A Forbes <diesel@easynet.co.uk> wrote:
In the days when Nicads were popular, 'C' cells came in industrial 2AH
or 2.2AH, but consumer cells were only 1.2AH, and often consisted of an
RR cell inside a C cell casing. Same with the D cell, industrial was
4AH or 4.5AH, consumer was 2AH, C cell in a D casing.

Peter
Click to expand...
------- Original text edited to fit 80 columns -------

Right Peter - here's more battery "truth in advertising" from Tricia's
website: http://www.tactical-link.com/wierd_stuff.htm

D.
 
"tw" <tw@emailaccount.com> wrote in message
news:d7bc9941.0410160903.45d83387@posting.google.com...
Dynamic mutual conductance model with manual. Fast and easy to use -
great for hi-fi and guitar amps. Refurbished, no reserve:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3845694295
Click to expand...
Quit posting to this group, it's off topic. "TW" must stand for TWIT.

And put [FA] in the subject line when you post an auction, Twit.
 
there is also another free website for datasheets
http://www.digchip.com
 
there is also another website for datasheets
http://www.digchip.com
 
"jha" <mohjha@hotmail.com> wrote in message
news:d2377eff979395ce8d27b5ea46290b4d@localhost.talkaboutelectronicequip
ment.com...
there is also another free website for datasheets
http://www.digchip.com
Click to expand...
Reserved for members only. So you have to become a member, with strings
attached, which in my thinking isn't exactly 'free'.
 
"Jean T?r?metz" <jean.teremetz@free.fr> wrote in message
news:8216c56.0410170754.a08732@posting.google.com...


Spreading a Virus? Nothing of value there!!!
 
Det schrieb:

I'mn searching for tis part a *.Pdf - File. I thing it's
a MOSFET with 4 Connection's, and sitting in a electrical Load.
Click to expand...
Surely made by Advanced Power Technology, www.advancedpower.com.


Regards,
Dieter
 
Isn't there a 13700 or 13800 that replaces it?

--
KC6ETE Dave's Engineering Page, www.dvanhorn.org
Microcontroller Consultant, specializing in Atmel AVR
 
"Norm Dresner" <ndrez@att.net> wrote in message
news:tuBcd.712247$Gx4.32734@bgtnsc04-news.ops.worldnet.att.net...
Another interesting item I found in the old data books was the LM13600
Dual
Operational Transconductance Amplifier (OTA) which looked like it
could be
used to make some useful circuits. According to National Semi's web
site,
it's been obsoleted [I didn't even know that obsolete was a verb!].
Are
there any other manufacturers making anything like this?
Click to expand...
I didn't even know that Google was a verb, either, but everyone seems to
think so! [;-)

Shame tho, that so many parts are becoming obsolete. Soon, all there
will be left is a custom circuit order form that you fill out, and
they'll ship you a bunch of them at some exhorbitant price.

> Norm
 
You are starting from the wrong end...

You need to determine the charging requirements of the 165V battery
itself before anything else. Only then can you determine what is
required of your charging circuitry and design it accordingly. The
fact that you want to use a 12V (nominal), 80W solar panel as the
charging source simply because that is what you have on hand is not
the way to go about the problem. Once you know what the charging
requirements of the battery are you can then determine how many solar
panels you will require in order to charge a 12V,24V or 48V battery to
power a suitable dc - ac inverter/rectifier/charging arrangement.


On Sun, 17 Oct 2004 21:42:58 -0700, "Damn Dan" <a@a.com> wrote:

|I've been working on a project that would recharge the battery of my Honda
|Insight (a hybrid vehicle) while I'm parked at work using a solar panel.
|The Insight's battery pack averages around 165V during usage. Currently I
|have the solar panel constantly charging a 12V battery with an appropriate
|charge controller. The battery is then connected to a 12Vdc to 120Vac
|inverter, which is connected to a 120Vac to 220Vac converter, which is in
|turn rectified to 220Vdc. I actually only get 200Vdc in the end, I guess
|just due to inefficiencies.
|
|I'm trying to design a current limiter that would only allow as much power
|into the 165V battery as is coming in from the solar panel. The panel is
|80W, so after it's been stepped up to 200V, the output current is 0.4Amps
|(200V * .4A = 80W). Thus, I want to implement a current limiter that will
|only allow 0.4A into the 165V battery.
|
|The main issue I'm dealing with right now is understanding how two power
|sources interact with each other in the same circuit. Specifically, I have
|a 200V source charging a 165V battery with 0.4Ohms internal resistance. So
|is that exactly equivelent to setting up a circuit with a 35V source
|(200V-165V = 35V) and a 0.4Ohm resistor? I set that circuit up in PSpice,
|but it doesn't seem to account for the two DC sources interacting with each
|other. Any thoughts?
|
 
On Sun, 17 Oct 2004 21:28:57 GMT, "Norm Dresner" <ndrez@att.net>
wrote:

|Another interesting item I found in the old data books was the LM13600 Dual
|Operational Transconductance Amplifier (OTA) which looked like it could be
|used to make some useful circuits. According to National Semi's web site,
|it's been obsoleted [I didn't even know that obsolete was a verb!]. Are
|there any other manufacturers making anything like this?
|
|Norm


Intersil make the CA3280
http://www.intersil.com/products/deviceinfo.asp?pn=CA3280
 
"mike" <spamme0@juno.com> wrote in message
news:4173A82D.20902@juno.com...
Damn Dan wrote:
I've been working on a project that would recharge the battery of my
Honda
Insight (a hybrid vehicle) while I'm parked at work using a solar
panel.
The Insight's battery pack averages around 165V during usage.
Currently I
have the solar panel constantly charging a 12V battery with an
appropriate
charge controller. The battery is then connected to a 12Vdc to
120Vac
inverter, which is connected to a 120Vac to 220Vac converter, which
is in
turn rectified to 220Vdc. I actually only get 200Vdc in the end, I
guess
just due to inefficiencies.

I'm trying to design a current limiter that would only allow as much
power
into the 165V battery as is coming in from the solar panel. The
panel is
80W, so after it's been stepped up to 200V, the output current is
0.4Amps
(200V * .4A = 80W). Thus, I want to implement a current limiter
that will
only allow 0.4A into the 165V battery.

The main issue I'm dealing with right now is understanding how two
power
sources interact with each other in the same circuit. Specifically,
I have
a 200V source charging a 165V battery with 0.4Ohms internal
resistance. So
is that exactly equivelent to setting up a circuit with a 35V source
(200V-165V = 35V) and a 0.4Ohm resistor? I set that circuit up in
PSpice,
but it doesn't seem to account for the two DC sources interacting
with each
other. Any thoughts?



I'm fascinated by all this.
Over 8-hours, you get at most 640WH. Depending on where you live and
what season it is and the weather and...and...and...maybe MUCH less.
About how much gas will this save you per day??
How much gas does it cost you to haul around all this extra weight?
What's the cost of a new set of batteries when your controller fries
'em? What's the cost of
the remote alarm system you'll need to let you know when someone stole
the panel?

Where are you gonna park it? Complete address please ;-)

...fascinating...
mike
Click to expand...
Geez, what a skeptic. Maybe he works on a campus with a guard t the
gate. Fries what batteries? It's unlikely to do that. As for saving
gas, that's a valid question, but it may have some saving.

But I'd say it's none of your biz where I park it!

> --
 
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