I hope this is just a dumb question and not some complicated problem
that I just bought.

Just picked up a Dentron GLA-1000. Filaments come on in standby, (1100
volts) and the t/r relay seems to be working. However when I put the
amp inline patched with coax between my transceiver and my antenna, I
lose reception as if the receiver can't "see" the antenna anymore.
Even if the amp is turned off. So I won't even try and tune the thing
of course!

Thanks for any suggestions,

Chuck
KB5GC