[R-390] Gain drift

[dog]

Larry,

Those carrier meter numbers were with the AGC disconnected. The meter is 
very sensitive to slight gain changes that way I notice. I'm going to 
hook up the AGC and the RF section today and see what it does. I expect 
it may be much more stable, the AGC action should make the meter act 
more as a log mode. I'm hoping.

Dave


On 10/21/2018 23:31, Larry H wrote:
> Hi  Dave,  Although you've made very good progress, unfortunately, I'm 
> thinking you still have a gain problem.  I just tested the stability 
> of gain on my daily driver and it's what I'd expect.  I set the 
> carrier level at 40 on a cal signal 3 hours ago and it  held very 
> stable for a long time, and has drifted slowly down to 39.  This is 
> with the agc hooked up and in normal cal operation with  8kc 
> bandwidth.  The set had been off for 16 hours.  Wish I had better news.
>
> Regards, Larry