Steve:

Well, I'm not an expert on these things, but I believe it is the T/R relays
that are tripping.

They don't trip often, but do so on occasion, and I haven't figured out a
consistent pattern to it yet.

My theory is that I'm either over-driving the amp at times (which is why I
have now cut the input power back a bit), or perhaps I'm getting RF back
into the amp somehow.

Getting RF back into the amp seems a bit unlikely, though, because I always
tune my antenna for a 1.0 to 1 SWR, and always make sure my reflected power
is at or extremely close to 0, at least according to my TW1.

Will let everyone know if I can more consistently determine what is going
on.

Tom Behler: KB8TYJ


-----Original Message-----
From: For blind ham radio operators [mailto:[log in to unmask]]
On Behalf Of Steve Forst
Sent: Monday, March 10, 2014 8:25 AM
To: [log in to unmask]
Subject: Re: Need To Find A Replacement Radio

While I'm not quite sure what is going on for Tom, I'm pretty sure he is
referring to the T/R relays in the amp, not any sort of protection circuit
relay.  Since he did buy the amp used, it is remotely possible it has an
optional grid protection  circuit installed, but I would really doubt it.  I
don't think there are any relays on that board and you would have to  flip
the standby switch off and on to reset it and get output from the amp after
a trip.

73, Steve KW3A