Re: Piezo audio preamp works but I would like advice
From: colin (no.spam.for.me_at_ntlworld.com)
Date: 07/27/04
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Date: Tue, 27 Jul 2004 15:52:56 GMT
"Jon" <u035m4i02@sneakemail.com> wrote in message
news:298d9774.0407232222.2fdda7f1@posting.google.com...
> I've just built this circuit for an internal instrument preamp and I'd
> like to run it by some other people. My current circuit is here:
>
>
http://img75.photobucket.com/albums/v229/Smashedupcar/other/current_circuit.png
>
> (Sorry it's an image and not ASCII. I can make ASCII if I must)
>
> It sounds good so far. Is there anything I did wrong? Frequency
> response? (Lowest frequency I care about is 100 Hz) Stability driving
> a guitar cable, etc.?
>
im not sure why u divide the input by two, you would get twice the signal to
noise ratio if you removed the divider from the input and used negatvive
feedback, if this is significant to you.
after using SMD i wldnt go back to using through hole components now, exept
when i use my breadboard, i found that you can stil use .1" vero board for
SMD if you carfeully cut down the lengths of the tracks with a sharp knife
or scalpel those .05" pitch ics wil fit nicley. no more holes to drill in
pcbs either.
incidently i got caried away with cuting tracks, and actualy cut out some
extra tracks i needed on the blank coper part of a pcb, first using a
scalpel, then using small drill and sort of engraving bit, then made my own
bit, now i make up small prototypes like that, obviously long tracks arent
worthwhile doing that way but most circuits can be fashioned to use mostly
rectangular pads wich are easy to cut out.
Colin =^.^=
- Next message: Tam/WB2TT: "Re: Receive NDB beacons ?"
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