Hi,

I want to fit a receiving preamp to my 29MH mobile radio which runs a 50watt
linear amplifier. My plan is to fit the preamp at the base of the 102" whip
and to switch it in and out of the co-ax circuit (when transmitting) by
means of relays activated by the mic press to talk button. Can I use any
12v relays, well shielded by copper boxes around them and what will happen
to my 50ohms impedance?

As you can see I need all the guidance I can get:)

Regards
Greg