[Elecraft] Receiver Protection

[Mike Wetzel]

My approach to this was to use my band decoders to drive a 4P relay and use
the relay contacts to drive filters, antenna switching, and "an add circuit"
so if 2 of the relays were on the same band a piezo device that emits a tone
as a warning of both radios being on the same band.  My 2 radio band decoder
is HB but the same idea could be implemented with a commercial units.

 

Mike W9RE

 

 

 

 

>My station consists of two K-3's, each with a dedicated legal limit
amplifier and SteppIr antenna. To minimize interference between bands I am
>using Array Solutions Bandpass filters. However, if both rigs accidentally
wind up on the same band I run the risk of overloading the front >end of the
opposite rig and damaging the receiver (which I've done once...). Does
anyone have a way of taking the band data information and >disabling
transmit capability on both rigs if they are on the same band? How are
others using SO2R avoiding same band transmission and >subsequent receiver
damage? Anyone have any experience with the Array Solutions AS-RXFEP front
end protector?

 

>Thanks,

>Jeff Larimore

>K0RG