[AMRadio] Protecting receiver (was WTB: Coax relay, 110VAC, aux contacts)

[Rick Poole]

Someone here suggested that instead of a coax relay, I just get a 
DPDT 110-VAC relay and use that, and he suggested a Radio Shack part 
number.  So, today I stopped by the local Radio Shack and bought the relay.

Then it occurred to me... the relay gives me one set of contacts to 
switch the antenna from transmitter to receiver, and another set to 
connect to the Mute input on the receiver.  I'm wondering if I should 
have a third set of contacts to short out the receive antenna input 
during transmit and protect the receiver front end.  The receiver is 
a Hammarlund HQ-180A and the transmitter is a barefoot DX-100B... do 
I need any front end protection for the receiver?... perhaps a pair 
of back-to-back 1N4148-type diodes across the receiver RF input?

Rick WA1RKT