[R-390] R-390A Operation Question

[thoyer]

Hi Larry, 

Thank you for the response. In the video I was using the med AGC setting. I
have found that to be the best all around setting as I cruise the bands.

I did not install any mods (yet) as I wanted to get a feel for how the radio
operated originally before making any mods. This way I can tell if the
installed mod has any benefit to me or not. 

The AGC diode mod is first on the list....... 

But first I have an SP-600 waiting in the wings for some attention. I think
I need to work on something else for a while. I spent about 2 months of
evenings on this 390A and a change of scenery is in order.

Have a health and happy 2018!

Regards, 

Tom
W3TA

-----Original Message-----
From: r-390-bounces at mailman.qth.net [mailto:r-390-bounces at mailman.qth.net]
On Behalf Of Larry H
Sent: Sunday, December 31, 2017 8:48 PM
To: r-390 at mailman.qth.net
Subject: Re: [R-390] R-390A Operation Question

Hi Tom,  The hissing noise that I heard from your recording sounds normal to
me for a weak station (it increased when switching to 8kc and then more on
16kc). As for the distortion with the RF gain on max - that is normally an
agc problem, especially receiving ssb.  Do you have the Dr. Langford '2
diode fix' installed for this?  If not, you could totally fix that with it
and my correction to it.  I couldn't tell which agc speed you were using
from the video, sometimes medium or fast works better.  Try all 3.
Good work on the R-390A.  Regards, Larry

     
   
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