[Boatanchors] How much is too much?

[Jim Haynes]

I don't know the answer, but the advice given about grounding all the
receivers not in use sounds good.

Even with tube equipment, you could get enough in through the antenna
to burn an RF coil.

I recall some old military tube equipment that had something like a neon
bulb across the antenna terminal to ground.  Doesn't seem like that would
limit the voltage enough, but maybe it did.  With more modern equipment
you might put something like diodes in parallel across the antenna, which
would limit the voltage to half a volt or so peak.  Will also generate
cross modulation and possibly cause the receiving antenna to radiate
harmonics of your transmitted signal, but will protect the receiver.

I don't remember all the particulars now, but there was one time when
I put a low-wattage light bulb in series with the antenna of a receiver,
to protect it when my housemate was using his transmitter.

You might want to study some Navy shipboard equipment, since that is a
situation where they can't get the antennas very far apart.  Look at
the web site http://www.navy-radio.com/manuals where there is a lot of
material.