[R-390] Audio resistors?

[Phil Atchley]

> There is hiss in the amp without any audio from the radios. I'm interested
> in reducing it if I can, but I'm not going to obsessed with the project.
> Less hiss means less noise with the R-390A and SP added when trying to dig
> out the weak signals. It's not all that much hiss, but it does contribute
to
> the total noise factor. Increasing treble also increases hiss. It is
> noticable with headphones.

Barry
Here is a guaranteed way to totally eliminate the hiss.  You gently pull
each tube out of it's socket, with a small pair of dikes you snip one
filament pin off.  Gently re-insert the tubes and turn the receiver on.
Voila!!!  No Hiss....

Runnin' and Duckin' in central California
Phil  KO6BB


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