[R-390] New Project - Latest Issue

[Tom M.]

Joe,

If you have a sig gen, set the IF gain for the minimum signal required to hear
the tone, or whatever measure you use.

I've seen articles about setting the pot at a certain clock position.  That is
too elementary.

The object of the game is optimal performance, and you obviously need some gain
to do that.

73 N5OFF
--- Carole White-Connor <carolew at bellatlantic.net> wrote:

> With your help, I'm getting there. The set is performing nicely.
> 
> My new issue is this: if I adjust the IF Gain per Chuck's instructions, I
> lose a
> lot. With weak stations, I have to adjust the AF Gain to maximum to be able
> to hear
> the station so that I can understand it. If I just the IF Gain high (about
> 1/8 turn
> from maximum), I get more background noise but I can hear the station with
> the AF
> Gain at about 6. The background noise does not drown out the station. This
> occurs
> both below and above 8 mhz.  I don't think I'm losing sensitivity because I
> can
> still hear the weak stations. On strong stations, they come in loud and clear
> pretty
> much wherever I set the IF Gain. I've been listening a lot on 49m and 41 m.
> Those
> bands are alive with stations.
> 
> All the tubes in the set test good. The weak ones have been replaced. I
> haven't done
> any work in the IF module except for replacing the caps that Chuck recommends
> replacing. I haven't touched the RF module.
> 
> Any ideas? Any particular things to suspect? Any troubleshooting tips?
> 
> Again, thanks for your help (and your patience)
> 
> Joe Connor
> 
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