[Drake] Feed through on R4B

[Darrel Nichols]

Mine's the A, but dirty relay contact, bad RCA connection or even the
sens & gain pots could all cause that.   At least the more simple causes...

N0DBX


> [Original Message]
> From: ed brooks <ed.brooks at att.net>
> To: <drake at mailman.qth.net>
> Date: 9/26/2004 9:46:24 PM
> Subject: [Drake] Feed through on R4B
>
> Time for me to dig out the manual.  But as I do so, I shall also pose 
> the question here.  Someone might save me some time, and that would be 
> neat.
>
> Noticed this evening when I was on 20 CW, that the R4B was hearing the 
> T4XB CW signal even in mute.  Yes, the mute is working, but not muting 
> all it should?  The signal heard is fairly strong, and is tuneable, so 
> it means it is getting into the R4B somewhere after the front end, but 
> not just in the audio chain.   I have noticed for some months a very 
> weak audio (NOT the sidetone!) in the receiver when I was in Tune with 
> the T4XB.  Not a problem in sideband or CW at the time.  This is the 
> first time I've heard it so loud.  It does get much louder, though, if I 
> put the RX in "ON" instead of "MUTE" as that kicks in the rx's front 
> end.   Haven't tried it with this new development on sideband,
>
> Whoops!  Just tried it again and it is all working normally - full mute, 
> no sound from the rx speaker.  A problem that has fixed itself.  Tried 
> it in both separate and RX as control, and it works.  Also the very weak 
> audio signal heard in the past is not present either.  Something 
> intermittent.  
>
> Any thoughts?
>
> Ed, W5HTW
>
>
>
>
>
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