You can't beat Barry's 'front end saver' at http://n1eu.com for a
combination of simplicity and effectiveness.
Two back-to-back diode strings (four 1N914 diodes per string) and a series
22 ohm resistor. If the diodes should go into conduction due to excessive RF
on the RX antenna, the resistor limits the current through them as well as
the voltage across the RX input.
I use something similar here, but with a small incandescent lamp (as a fuse)
in place of the resistor, and just two 1N914/1N4148 diodes per string.
73, Mike
http://www.w0btu.com/Beverage_antennas.html
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UR RST IS ... ... ..9 QSB QSB - hw? BK
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