audio recording on IC -help wanted

Michael A. Terrell
Guest

Sun Jan 10, 2010 12:35 am

Lostgallifreyan wrote:

Quote:

Boris <boris.kj_at_googlemail.com> wrote in news:f3377393-e256-42ea-bf34-
6d4a14745048_at_c3g2000yqd.googlegroups.com:

Hi, I am looking for substitute of 2SC2618 (smd).
maybe you can help me - what I can use instead?

Boris

I don't know (my Towers selector book is too old for that one, but I can
copy out its specs for you if you need) but I crossposted this reply to
sci.electronics.components where there's an increase in chance of a useful
answer.

<http://www.mcmelectronics.com/product/NTE2406&cid=prodCrossSell>

$2.11 each

--
Greed is the root of all eBay.

legg
Guest

Sun Jan 10, 2010 6:13 am

On Sat, 09 Jan 2010 09:36:36 -0600, Lostgallifreyan
<no-one_at_nowhere.net> wrote:

Quote:

Boris <boris.kj_at_googlemail.com> wrote in news:f3377393-e256-42ea-bf34-
6d4a14745048_at_c3g2000yqd.googlegroups.com:

Hi, I am looking for substitute of 2SC2618 (smd).
maybe you can help me - what I can use instead?

Boris

I don't know (my Towers selector book is too old for that one, but I can
copy out its specs for you if you need) but I crossposted this reply to
sci.electronics.components where there's an increase in chance of a useful
answer.

The Hitachi data sheet doesn't indicate anything really special about
this part. It's a standard 35V part with 500mA continuous current
rating. The SC59 package can usually be substituted by a BC817's SOT23
size, with carefull soldering to cover the (possibly) longer pad
pattern.

RL

Lostgallifreyan
Guest

Sun Jan 10, 2010 10:36 am

legg <legg_at_nospam.magma.ca> wrote in
news:f2oik5p4vhch8dstra7e6idpr6kmsea720_at_4ax.com:

Quote:

The Hitachi data sheet doesn't indicate anything really special about
this part. It's a standard 35V part with 500mA continuous current
rating.

That's what I was thinking too, but the low gate capacitance suggests good
for RF, and the first post came from rec.radio.amateur.antenna, so I didn't
suggest spreading the search beam too wide because I don't know enough
about it.. But the Towers book didn't suggest that high in RF either, nor
does the data Ian Fields posted.

Lostgallifreyan
Guest

Sun Jan 10, 2010 11:40 am

Boris <boris.kj_at_googlemail.com> wrote in news:2e06d082-c499-4c36-9346-
a41f4d381b54_at_m25g2000yqc.googlegroups.com:

Quote:

On Jan 10, 9:36 am, Lostgallifreyan <no-...@nowhere.net> wrote:
legg <l...@nospam.magma.ca> wrote innews:f2oik5p4vhch8dstra7e6idpr6kmsea7
20_at_4ax.com:

The Hitachi data sheet doesn't indicate anything really special about
this part. It's a standard 35V part with 500mA continuous current
rating.

That's what I was thinking too, but the low gate capacitance suggests goo
d
for RF, and the first post came from rec.radio.amateur.antenna, so I didn
't
suggest spreading the search beam too wide because I don't know enough
about it.. But the Towers book didn't suggest that high in RF either, nor
does the data Ian Fields posted.

Hi,
This transistor goes to generator - quote " and the following 2SC2618
NPN transistor operate as a current source for the AD9851 DAC bias
circuit."
So what you guys think, something like bcx19 should be ok?

Beyond me to be certain, but it looks like 'yes'. That doesn't sound like
it's an RF or otherwise demanding task. Don't pick something with poor noise
specs though.

Boris
Guest

Sun Jan 10, 2010 12:07 pm

On Jan 10, 9:36 am, Lostgallifreyan <no-...@nowhere.net> wrote:

Quote:

legg <l...@nospam.magma.ca> wrote innews:f2oik5p4vhch8dstra7e6idpr6kmsea720_at_4ax.com:

The Hitachi data sheet doesn't indicate anything really special about
this part. It's a standard 35V part with 500mA continuous current
rating.

That's what I was thinking too, but the low gate capacitance suggests good
for RF, and the first post came from rec.radio.amateur.antenna, so I didn't
suggest spreading the search beam too wide because I don't know enough
about it.. But the Towers book didn't suggest that high in RF either, nor
does the data Ian Fields posted.

Hi,
This transistor goes to generator - quote " and the following 2SC2618
NPN transistor operate as a current source for the AD9851 DAC bias
circuit."
So what you guys think, something like bcx19 should be ok?

townt.com
Guest

Mon Jan 11, 2010 4:54 pm

we do have stock of the 2SC2618

For obseleted component, we do have some stock.

--
Patrick Cheung - townt.com
E-mail : patrick.cheung_at_townt.com
Tel : (852)2505-5838, Fax : (852)2505-8121
Address : 1805, Wu Sang House, 655 Nathan Road, Mongkok, Kowloon, Hong Kong

Online Shop Section :
http://shop.townt.com

Electronic Component Section :
http://electronic.townt.com

Check Electronic Component Online Here :
http://component.townt.com

"Lostgallifreyan" <no-one_at_nowhere.net> ¦b¶l¥ó
news:Xns9CFB9EAE21BBBzoodlewurdle_at_216.196.109.145 ¤¤¼¶¼g...

Quote:

Boris <boris.kj_at_googlemail.com> wrote in news:f3377393-e256-42ea-bf34-
6d4a14745048_at_c3g2000yqd.googlegroups.com:

Hi, I am looking for substitute of 2SC2618 (smd).
maybe you can help me - what I can use instead?

Boris

I don't know (my Towers selector book is too old for that one, but I can
copy out its specs for you if you need) but I crossposted this reply to
sci.electronics.components where there's an increase in chance of a useful
answer.

betatwelve
Guest

Wed Apr 07, 2010 5:01 pm

describe wireless extension?

this site gives some ideas http://www.eseco.fr after analyzing wireless
betatwelve <betatwelve_at_voila.fr>
Wink

James Sweet
Guest

Wed Jun 09, 2010 11:18 pm

Quote:

Sometimes I get the bright light, the maginfier, the digital vernier scale,
and measure the damn things myself! That way I KNOW it fits.

I keep a dial caliper on my desk for just that. Comes in handy when I'm
designing around parts I plan to harvest from scrap PCBs too, I can
measure the parts prior to even removing them.

Tim Williams
Guest

Mon Jul 12, 2010 6:50 pm

Don't forget to connect two resistors in antiparallel before burning them in. Because of... uhh.. something?!

Tim

--
Deep Friar: a very philosophical monk.
Website: http://webpages.charter.net/dawill/tmoranwms

"Lostgallifreyan" <no-one_at_nowhere.net> wrote in message news:Xns9DB3BCBBE5F3Ezoodlewurdle_at_216.196.109.145...

Quote:

http://bursonaudio.com/burson_opamp.htm
http://www.audioenz.co.nz/forums/archive/index.php/t-5625.html

Don't ask me how I bumped into those while Googling for a few bits of info on
audio op-amps, I just wish I hadn't, and want to spread the pain. > Smile

Vladimir Vassilevsky
Guest

Mon Jul 12, 2010 6:50 pm

Lostgallifreyan wrote:

Quote:

http://bursonaudio.com/burson_opamp.htm
http://www.audioenz.co.nz/forums/archive/index.php/t-5625.html

Don't ask me how I bumped into those while Googling for a few bits of info on
audio op-amps, I just wish I hadn't, and want to spread the pain. > Smile

1. The AP THD meter has a floor of ~0.0008% THD for direct measurement.
Hence all measurements in vicinity of 0.001% are going to be vastly
inaccurate; unless with a special test setup using passive filters.

2. The state of the art is ~0.00005% THD in the audible band. They claim
0.001% which is really not any distinguished result.

3. Practicality: I am fine with 0.1% THD. However if somebody is willing
to pay money for 0.0001%, I will be glad to provide them the opportunity.

Vladimir Vassilevsky
DSP and Mixed Signal Design Consultant
http://www.abvolt.com

Joerg
Guest

Mon Jul 12, 2010 6:55 pm

DLostgallifreyan wrote:

Quote:

http://bursonaudio.com/burson_opamp.htm
http://www.audioenz.co.nz/forums/archive/index.php/t-5625.html

Don't ask me how I bumped into those while Googling for a few bits of info on
audio op-amps, I just wish I hadn't, and want to spread the pain. > Smile

Did you see the "CNC cuted PCB"? Now that's high-tech, ain't it?

BTW, I believe they still sell nuclear energy separators in Europe.
Those probably ID every electron coming out of your wall outlet, run a
background check and some DNA tests on it, and send it back if they find
it had been lingering at a nuclear power station on its most recent
trip :-)

--
Regards, Joerg

http://www.analogconsultants.com/

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

Lostgallifreyan
Guest

Mon Jul 12, 2010 7:09 pm

Joerg <invalid_at_invalid.invalid> wrote in
news:8a138tFku2U1_at_mid.individual.net:

Quote:

Did you see the "CNC cuted PCB"? Now that's high-tech, ain't it?

Yep, I did. Smile

I couldn't beleive my eyes though, so it didn't register. I'd
hoped I could see an enlarged copy of that image they had that on, but I
guess keeping it small spares their blushes.

Incidentally, I wonder what all that back-to-back PCB stuff does for their
crosstalk figures.

Jamie
Guest

Mon Jul 12, 2010 7:11 pm

Lostgallifreyan wrote:

Quote:

http://bursonaudio.com/burson_opamp.htm
http://www.audioenz.co.nz/forums/archive/index.php/t-5625.html

Don't ask me how I bumped into those while Googling for a few bits of info on
audio op-amps, I just wish I hadn't, and want to spread the pain. > Smile

http://www.usa.denon.com/productdetails/3429.asp

Lostgallifreyan
Guest

Mon Jul 12, 2010 7:20 pm

Jamie <jamie_ka1lpa_not_valid_after_ka1lpa__at_charter.net> wrote in
news:MPI_n.7632$Zp1.7078_at_newsfe15.iad:

Quote:

http://www.usa.denon.com/productdetails/3429.asp

When I saw the price of that, I understood how Vitalstatix felt when Getafix
told him he thought it was 'rather pleasing' that the Romans came to their
part of the Gaulish forest for a rest cure after tours of duty in Belgium.

Curious that Denon have sold out to that kind of marketing. I guess they
found the opportunity less resistable than Vladimir Vassilevsky does. Smile

it
IS tempting.. Never mind Age of Austerity, we'll know when times are really
tough, because this kind of bullshit will quietly stop happening because
people can't pay for it.

Ian Bell
Guest

Mon Jul 12, 2010 8:07 pm

Lostgallifreyan wrote:

Quote:

http://bursonaudio.com/burson_opamp.htm
http://www.audioenz.co.nz/forums/archive/index.php/t-5625.html

Don't ask me how I bumped into those while Googling for a few bits of info on
audio op-amps, I just wish I hadn't, and want to spread the pain.> Smile

It's Patrick Turner in disguise, making a fast buck from the audiophools
so he can fund his tube work ;-)

Cheers

Ian