[Elecraft] K3 Receiver Protection

[dmb at lightstream.net]

Hello Jeff,

I use the Array Solutions AS-RXFEP inline w/ my K3 AUX (2nd rx input). At
times the rx antenna is within 20 feet of the tx antenna. Without the
protector in place the receiver COR relay was being triggered with as
little as 20 watts at times, but with the RXFEP inserted, I could run 500W
from the KPA500 without ever engaging the COR. According to the Array
Solutions documentation, the input to the receiver is limited to .3v
(0dBm), and the internal components of the device can handle 10 watts.

I keep the device inline with the 2nd receiver input at all times,
regardless of which rx antenna I'm using, and it has worked perfectly (and
silently).

73, Dale
WA8SRA


>
> 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
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