[MRCA] Help with an ARC-4

[jphutch60bj]

Paul -

Shot in the dark:

Is there not a squelch sensitivity adjustment control ?   so can you 
adjust, turn the sensitivity down on the squelch amp?

Hutch

On 4/8/2020 7:31 PM, Paul Sokoloff wrote:
> An amazing thing happened.  I powered it up and it received.  Just 
> having issues with the noise gate (squelch) circuit.  It seems to shut 
> the audio down when the signal is too low (which is normal), but also 
> shuts the audio down as the signal level increases.  I spent the 
> afternoon replacing parts in the circuit and the tube but no change.  
> Looking at the 10 MHz IF on the plate of the last IF amplifier looks 
> fine.  Does anyone have experience with this radio?  I know it's kind 
> of and oddball one.  I'd like to get the noise gate working or disable 
> it.
>
> Thanks,  Paul  WA3GFZ
>
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