audio recording on IC -help wanted

[Jonathan Kirwan]

On Sat, 30 Sep 2006 11:16:24 -0700, Jim Thompson
<To-Email-Use-The-Envelope-Icon@My-Web-Site.com> wrote:

On Sat, 30 Sep 2006 14:11:42 -0400, "Spamfree"
Spamfree@intendtostaythatway.com> wrote:

[snip]

Replying to this and the subsequent posts - I've seen so-called businesses
on e-bay pack worse than individuals. You just never know. I learned LONG
ago, to pack like the Samsonite commercials use to display - "rough"
handling. My "ex" mother in law sent a box of glassware to her daughter in
law one year. They were packed well and proven as such. When we went to the
UPS office, the business was transacted and they were told it was
"glass"........ The UPS lady picked the box up and gave it a heave ho to a
pile. My "ex" mother in law was pissed. BUT, the package "did" survive the
journey. Again, it isn't rocket science, but many have yet to master it.
Some "may" not want to "buy" a lot of supplies if they don't sell
"regularly". No big deal, go to most any store and you can acquire boxes and
foam for free that their store displays came out of. I have an appliance
store near by, I can get most any size box I need. Then too, if you GET
packages - SAVE the bubble wrap/peanuts/etc. It doesn't have to cost a mint!
It doesn't have to be confusing. It doesn't have to cause problems for the
buyer or seller.

What kills me, is when "I" get an item which is shipped in a box 6 or more
times the size of the item....... Talk about overkill!


I only use USPS (or UPS) when I can afford to have it lost... FedEx
has never failed me.

I have had similar experience.

Jon

 

[Charlie Edmondson]

Spamfree wrote:

"Lostgallifreyan" <no-one@nowhere.net> wrote in message
news:Xns984ECBDCBB83zoodlewurdle@140.99.99.130...

"Spamfree" <Spamfree@intendtostaythatway.com> wrote in
news:451eb341$0$25783$ecde5a14@news.coretel.net:


Again, it isn't rocket science, but many have yet to master it.

Actually, packaging IS complex. To optimise it fully takes as much command
of physics and calculation of likely operating conditions as electronics!
(Commercial hauliers put a lot of R+D into packing, as do makers of
expensive equipment).

What makes it easier is two things: the cheapness of overengineering for
safety, and our more easy tangible grasp of the facts. A limited number of
stock items also makes choices easy.

If you know what you're buying, you can always specify packaging to the
seller. I bought a second-hand hard drive and knowing the tendency for
some
people to use layers of newspaper for fragile stuff, and knowing how dense
and incompressible that stuff is unless you take lots of time to form
crumple zones, I asked the seller instead to just get a larger box, I
don't
care how rough it is, and to put all the shitty scrag ends of bublewrap
he'd not want to indignify anyone elses parcel with around that drive. He
didn't have to think, he was happy to shove all the crap that would fit
round it, and it arrived in perfect order.

Another time I wanted three HeNe laser tubes. I made the box and lined it
myself and put rolls of paper where the tubes should go, sent it to the
seller, said replace paper with glass, send it back. Again, it worked
perfectly, and it's always worth specifying somehow, if you know the
product better than the seller does. This is almost always the case when
buying electronics or optics parts from eBay surplus suppliers.

That won't work for full-on commercial sellers but they've (hopefully) got
decent arrangements made. It's works great for private sellers though, who
usually have the remains of packaging from private buying.


While you "could" be right about the calculations, R&D - etc of "bigger"
places, I think the gist of this is for "small" businesses (mom and pop) AND
individual sellers - the e-bay and newsgroups buying crowds. THEY don't use
high tech or high priced packaging. If you "pack" it securely - as you would
want to "receive" it - chances are you'll do a good job. Simply "throwing"
something into a box - adding some newspaper or peanuts and not "securing"
the item or cushioinng it - is half assed. Yes, it does take "some" effort
to pack - but again - it isn't "impossible" to get the hang of!

Fed Ex doesn't pick up (packages) near me - the closest place I know of, is
their terminal - 40 miles away. So, I use UPS and USPS. I've had a decent
record so far sending and receiving.



My favorite shipping fiasco came from drugstore.com. My wife ordered

some stuff, including a couple of Christmas presents from them last
year. Among the items she purchaed was a bottle of liquid chlorphyll,
which she likes to drink for here digestion.

They shipped it in their usual big box, with NO padding! Of course, the
glass bottle of chlorphyll was smashed, which stained everything in the
box, plus probably everything it came in contact with in the mail, a
bright green! The post office was not happy with that one!

Charlie

 

[Homer J Simpson]

"Tom Lucas" <news@REMOVE_auto_THIS_flame_TO_REPLY.clara.co.uk> wrote in
message news:1159781743.94702.0@demeter.uk.clara.net...

It is a shame to watch it destroy itself when I used to have such a love
for the place. The Chatham branch is still one of the "old school" dingy
stores with a big storeroom but it increasingly becoming staffed by
muppets and children and they are beginning to discontinue the useful, but
obscure, bread and butter lifeblood. I lost count of the times that
someone would come in looking for a video drive belt and leave with a bag
full of other bits and pieces but, these days, they just leave empty
handed.

Pretty much what happened to Radio Shack in the US. Perhaps they are the
model - certainly their stock is now 1/4 of what it once sold for.

 

[Homer J Simpson]

"John Fields" <jfields@austininstruments.com> wrote in message
newsl72i2punc1bvr44eu6lfq4n9h8cqrl5dk@4ax.com...

So, even the four-year-old has to dumb it down for you?

Other way around. I need him to translate your demented babblings into
something approaching human speech.

 

[Mike Monett]

Gene S. Berkowitz <first.last@comcast.net> wrote:

In most cases, our SMT boards are not economical to
repair; the labor cost of removing one PLCC package, or God forbid, a
BGA, very rapidly approaches our cost for a new, fully populated and
tested PCB from our turnkey vendor.

It's cheaper and easier to shred the entire product, case & all, skim
the plastics off to make park benches, and throw the rest in the
crucible and separate out any metals of value.

--Gene

Just out of curiosity, Gene, do you do any failure analysis to determine
the cause before shredding the evidence?

Regards,

Mike Monett

Antiviral, Antibacterial Silver Solution:
http://silversol.freewebpage.org/index.htm
SPICE Analysis of Crystal Oscillators:
http://silversol.freewebpage.org/spice/xtal/clapp.htm
Noise-Rejecting Wideband Sampler:
http://www3.sympatico.ca/add.automation/sampler/intro.htm

 

Still looking for the ES1488/ES488 pinout... surely someone has an old
databook, or schematic of laptop which used it?

crumpton69@googlemail.com wrote:

Hi.
Excuse me if this is the wrong newsgroup to ask, but I'm looking for a
datasheet on the ES1488 (or even ES488), a SoundBlaster (tm) compatible
chip, used in early laptops....
Made by ESS, it was one of the first in their "AudioDrive" (tm) series.
Just the pinout will do to get me started!

Have asked ESS directly, but no joy - surprise, surprise... :-(
And have tried "Wayback Archive", but found only ES688, ES18xx - no
good: bigger packages.

Any help much appreciated.
- Mark Crumpton

 

[Patrick - townt.com]

Hi !

We do have stock of the 2N1300 from MOT.

Can you tell us your idea price with QTY request ?

Thanks !

--
Patrick Cheung
townt.com
Address : 1805, Wu Sang House, 655 Nathan Road, Mongkok, Kowloon, Hong Kong
Tel : +852-25055838
Fax : +852-25058121
E-mail : patrick.cheung@towntarget.com.hk
Web-site : http://www.townt.com/towne/ or http://www.towntarget.com.hk

"Dieter Wiedmann" <dieter.wiedmann@t-online.de>
???????:45488b76$0$27617$9b4e6d93@newsspool2.arcor-online.net...

coperation@hotmail.com schrieb:

I am current trying to get a replacement for this 2N1300 because I
could not find it in Melbourne. Does anyone know the replacement?

A direct replacement doesn't exist. What kind of application is it?


Regards,
Dieter

 

Hi Joerg,

That is for a batteries operated radio control model, and this broken
transistor is on the receiver side. The receiver side is operating at
7.2V.

I may try a PNP transistor with a higher power rating to see whether it
will work, as I do not have the circuit diagram for it and unable to
check what is it for.

Thanks everyone for the valueable information.

Best regards

Wallace

Joerg wrote:

Hello Jorgen,


I am current trying to get a replacement for this 2N1300 because I
could not find it in Melbourne. Does anyone know the replacement?

A direct replacement doesn't exist. What kind of application is it?

datasheetarchive.com says: AF124 ; 2N990 ; TA1763

But these are also made of unobtainium...


Unless it is a single-cell battery application that has to run down to
less than 1V it may be possible to substitute with a regular silicon
transistor.

--
Regards, Joerg

http://www.analogconsultants.com

 

[Jamie]

coperation@hotmail.com wrote:

Hi all,

I am current trying to get a replacement for this 2N1300 because I
could not find it in Melbourne. Does anyone know the replacement?

Thanks for helping.

Best regards

Wallace

Hmm, i don't have the 2N1300 how ever, i do have a few

2N1017 around here..
that one is an R.F. IF, Mixer etc..


--
"I'm never wrong, once i thought i was, but was mistaken"
Real Programmers Do things like this.
http://webpages.charter.net/jamie_5

 

[Dieter Wiedmann]

Slang schrieb:

I must replace a MIC4576-5 in one LCD monitor circuit.
Can you tell me if a LM2596S-5 is compatible (I find it more easy)?
Reading the datasheet it seem ok, with the esclusion of few external
components, (in particular the capacitors). The great difference seems
to be the frequency of switch (200 KHz against 150 KHz): do you think it
can work?

It does, BTDT.


Regards,
Dieter

 

[Jorgen Lund-Nielsen]

Dieter Wiedmann wrote:

coperation@hotmail.com schrieb:

I am current trying to get a replacement for this 2N1300 because I
could not find it in Melbourne. Does anyone know the replacement?


A direct replacement doesn't exist. What kind of application is it?


Regards,
Dieter

datasheetarchive.com says: AF124 ; 2N990 ; TA1763

But these are also made of unobtainium...

Jorgen

 

[PeteS]

ggap wrote:

Tried before.
No match!!!
Unbelievable!

"PeteS" <peter.smith8380@ntlworld.com> wrote in message
news:El56h.17169$hK2.7596@newsfe3-win.ntli.net...
Ben wrote:
"ggap" <ggap@net.hr> schreef in bericht
news:ej6lkf$q7e$1@ss408.t-com.hr...
Can't find this component in the Internet.
Any idea?
I found it in car remote - BUT IS HAS NO ANY CONTACTS, it's stuck into
plastic wrapping.

Not sure, but could it be a "transponder", in form of a small glass tube
with coil and small IC inside, my FORD remote key has one, if I remove it
from the key the car won't start.

Regards,
Ben
The PCF prefix denotes a Philips Semi (now nxp) part. As the NXP site
truly sucks, it may not be exporting the appropriate pages via google or
other engines.

I suggest you look at nxp, if you can stomach the useless flash and crap.

http://www.nxp.com/index.html

I now refuse to use their parts - I can't even navigate the site without
javascript and flash enabled.

Cheers

PeteS


It's possible the part was made by Philips (now NXP) for a specific OEM

under contract and therefore has the Philips prefix but is not available
to a general public search.

Cheers

PeteS

 

[Joerg]

Hello Michael,

My problem is a little tougher. Ye olde Rohde&Schwarz SMF generator has
decided that 50 years is enough. I loved it for its low noise, not
rivaled by any of the modern gear here in the lab. The cathode current
of the oscillator tube faints after a few minutes of operation.
Unfortunately that old EBF11 steel tube is unobtanium unless one is
willing to pay collectors prices. John can probably substitute another
JFET here but that tube is another matter :-(


Jeorg, check ALL of the coupling and bypass capacitors for leakage.
I have a TS-382 military audio generator of that vintage, and every
paper capacitor in it is defective, including the oil filled "Bathtub"
capacitors soldered into sealed cans. Mine is so bad that it doesn't
even get to warm up before one of the grids goes positive, and burns up
three 10 Kohm, 1 W resistors in the screen circuit of the driver stage.
I am restuffing the cans with metalized polyester capacitors that I
bought from http://www.mcminone.com


Thanks for the hint. Although a grid going positive should lead to more

cathode current. In the SMF case it just drops off. Looks like the
cathode is just plain tired. But I'll go in there and measure again.

--
Regards, Joerg

http://www.analogconsultants.com

 

[Boris Mohar]

On Tue, 14 Nov 2006 08:30:41 GMT, Joerg
<notthisjoergsch@removethispacbell.net> wrote:

Hello Folks,

Is there an n-channel FET that can stomach 180V or more yet switch in
nanoseconds? I am looking for around 3-4 nsec or less for rise time,
fall time, toff delay and ton delay. The Zetex ZXMN10 does that nicely
but it's only 100V.

Zetex ZVN4525

--

Boris Mohar



--
Posted via a free Usenet account from http://www.teranews.com

 

[Dennis Doe]

This was a Philips (now NXP) part.
It has not been offered for about six years.
It is described as a "secured program, readwrite transponder" according to
DN44 on the NXP site.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
"ggap" <ggap@net.hr> wrote in message news:ej6lkf$q7e$1@ss408.t-com.hr...

Can't find this component in the Internet.
Any idea?
I found it in car remote - BUT IS HAS NO ANY CONTACTS, it's stuck into
plastic wrapping.

 

[ggap]

Thanks, all of you.

 

[Rich Grise]

On Wed, 15 Nov 2006 21:15:09 +0000, Robert wrote:

Don Lancaster <don@tinaja.com> wrote in
....
Should be 3.579545 of course.

32.768 kHz is 2^15 Hz

Where does 3.579545 MHz come from?

TV color burst.

Cheers!
Rich

 

[Michael A. Terrell]

Robert wrote:

32.768 kHz is 2^15 Hz

Where does 3.579545 MHz come from?

NTSC color burst.


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida