On Wednesday 13 September 2006 08:53 pm, jr_dakota wrote:
> --- In [email protected], "Roy J. Tellason" <[EMAIL PROTECTED]>
> wrote:
> > Are they? I have a guitar amp here that uses one at the input, and
> > it's very noisy. I thought I might be able to improve that by replacing
> > the FET but it didn't help it much.
> The reason it didn't help is most of the noise is from the guitar
> pickups, most of which are poorly wired (not single point grounded)
> and use unshielded cavities
Ah, but I don't own an electric guitar, I use the amp for other things. And
even with nothing plugged in I still get a lot of noise coming out of that
preamp. Which is why I modified it so the second jack goes right into the
power amp, directly, bypassing all of that stuff.
> I currently have 5 guitar amps, 4 of which are designed and built from
> scratch, the 5th is actually an amp simulator (Berhinger V-Amp Pro),
> all my electric guitars ('68 SG, '74 Les Paul and a '04 Telecaster)
> have been completely rewired and have full cavity shielding
>
> This may seem off topic to most but the above is quite relevent to the
> design of SDR backends and should give people ideas on ways (or at
> least reasons why) to improve over the mediocre performance of the INA
> series of mic preamps which are only found in low end recording/sound
> mixers and some mid-range DJ mixers ... yes I have an INA series mic
> preamp in my SDR testbed but only as use as a baseline to compare with
> (hopefully) better designs
Not wanting to belabor this in here, I will agree that there is a great deal
of cross-fertilization possible from different areas... :-)
--
Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space, a critter that can
be killed but can't be tamed. --Robert A. Heinlein, "The Puppet Masters"
-
Information is more dangerous than cannon to a society ruled by lies. --James
M Dakin
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