Good afternoon...

I have several receivers and transceivers that I'm going to set up to
monitor different frequencies. Then I'll use the main rig for
transmitting (occasionally use the others to transmit but they'll be used
for receiving 99 percent of the time).

I need to know how best to protect the front ends of the other radios from
damage while I transmit, especially if I accidentally transmit on the
frequencies to which they're tuned.

The main transmitter runs 200 watts and the antennas for all the radios
are a few dozen feet apart, and that seems like an awful lot to go feeding
into the front ends of some of the solid state rigs.

Receivers and transceivers a
Icom IC-735
Kenwood TS-120S
Yaesu FT-1000
Kenwood TS-940
Hammarlund HQ-180A (I hope...if I find one) :-)
Zenith Transoceanic R-7000

The FT-1000 is the one that will be used most often for transmitting.

I'm not real concerned about the Hammarlund but the rest of them,
particularly the Zenith, seem somewhat vulnerable.