> Could be a ground loop between all that stuff, causing a problem. Reason
> I say that is you said if you unplug the key line from the amp it goes
> away, but turning the amp OFF doesn't make it go away.
>
> Tried bonding the two chassis together (2002 and 736R) with heavy
> strapping, short distance?
>
> If you listen on another 2m receiver when this is happening, what's it
> sound like? If you don't have a second 2m receiver, can you ask a local
> friend what it sounds like?
>
> The 736R is notorious for bad/intermittant mike cable ground problems at
> the front panel, which can take a small loop problem and make it worse.
> Have you measured continuity between the "ring" (threaded outer shell) of
> the front panel mike jack and real chassis ground?
>
> Does this problem still occur if you leave everything connected as usual,
> but turn the Mirage interstage amplifier OFF?
>
> WB2WIK/6
>
>
>
> Hope someone can help here.. I have a Yeasu FT-736R that I am driving a
> Tempo Henry 2002 with via the external amp keying lines out the back of
> the
> radio. All is fine. Now the 736 doesn't give near the amount of drive
> required to get the full output of the 2002. I put a Mirage B1016 and an
> older 10/80 Mirage after the 736 to give the 2002 more drive. Problem is
> it's picking up feedback some how via the key line. Long as the key line
> is connected to the 2002 and I use the brick amp, once I unkey the radio
> is
> over loaded with signal and take 5-6 secs for the AGC to drop out to allow
> signal again. This happens with the 2002 off or on, long as the key line
> is
> connected. I can unplug the key line from the 2002 and everything works
> fine. I assume is getting feed back someplace because on SSB I still have
> 50-60 watts of carrier on a dead key after stopping audio. Suggestions ?
>
> Dave
> N5ITO
>
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