[R-390] R-390a question

[Bob Camp]

Hi

The IF gain setting will make the radio behave any way you wish it to  
going from AGC to MGC.

Bob


On Feb 11, 2008, at 7:21 PM, Tony Casorso wrote:

> Hi everyone,
>
> I have a question about MGC vs AGC mode. On my R-390a there is a  
> substantial jump in gain when switching from AGC to MGC while I am  
> tuned to nothing but atmospheric noise. I measured it with the line  
> meter and the jump is about 12db. I also measured the AGC terminal  
> on the back of the set and the AGC sits at -1.8 volts in the AGC  
> position with the same signal. In MGC the AGC voltage goes to zero.
>
> Does this sound right? The reason I ask is that I have noticed that  
> weak stations are easier to copy in the MGC mode. I thought the AGC  
> delay was supposed to prevent this. Maybe the Lankford SSB mod (2  
> diodes) affects this?
>
> Thanks,
>
> Tony
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