Re: mic preamp modification

I read in sci.electronics.design that rex <notat@xxxxxxxxxxxxxxx> wrote (in <ofrh51hebv8q7runtaoaih262u8dptkjlt@xxxxxxx>) about 'mic preamp modification', on Sun, 10 Apr 2005: 
On Sun, 10 Apr 2005 07:50:37 +0100, John Woodgate
<jmw@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:

I read in sci.electronics.design that rex <notat@xxxxxxxxxxxxxxx> wrote
(in <v6og51l9il3o7nm2fdjoipb9rtbdie9gvq@xxxxxxx>) about 'mic preamp
modification', on Sat, 9 Apr 2005:

On Sat, 09 Apr 2005 23:01:37 GMT, Joerg
<notthisjoergsch@xxxxxxxxxxxxxxxxxxxxx> wrote:

Hello Rex,

               ....and have posted it as 'mic preamp' in ABSE.
5heg51df30ubgvcvdjb4u6pfjv969b79sp@xxxxxxx


Maybe it's just me but I cannot see the attached file in this ABSE post.

Regards, Joerg 

Sorry, when you post text and graphics there it splits it into two
messages with the same subject. I linked the text part, here is the
image part...
<infg511uht42r0d8cn2hjh3pbsof9h0d1i@xxxxxxx>

ABSE doesn't split files with attachments into two bits. Either your
news client is doing that, or something en route.


I never posted with an attachment in a newsgroup before. I notice
Phantom's postings there look like mine, so maybe it has something to do
with Agent.

I looked at your drawings and I think the design would be improved in terms of signal-to-noise ratio with a long-tailed pair of very low-noise discrete transistors before the op-amp. But it's not trivial to design this. Unless the noise causes a real problem **when the mixer is actually in use**, I would leave well alone. Or sell it on Ebay and get a better one.
--
Regards, John Woodgate, OOO - Own Opinions Only.
There are two sides to every question, except
'What is a Moebius strip?'
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk
.

Relevant Pages

  • Re: mic preamp modification
    ... I read in sci.electronics.design that rex wrote about 'mic preamp modification', on Sat, 9 Apr 2005: ... Regards, Joerg ...
    (sci.electronics.design)
  • Re: mic preamp modification
    ... I read in sci.electronics.design that rex wrote about 'mic preamp modification', on Fri, 8 Apr 2005: ... It was hard to read them in the circuit but I didn't see anything other than the 0402 that could be a value, so I assume it might mean 4000 somethings. ... There are two sides to every question, except 'What is a Moebius strip?' ...
    (sci.electronics.design)