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LF: Receiver protection

To: "[email protected]" <[email protected]>, "[email protected]" <rsgb_lf[email protected]>, "Discussion of the Lowfer (US, European, & UK) and MedFer bands" <[email protected]>, "[email protected]" <[email protected]>
Subject: LF: Receiver protection
From: N1BUG <[email protected]>
Date: Tue, 10 Jul 2018 08:04:25 -0400
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Does anyone have ideas for receiver front end protection at LF and
MF? I am worried about my TX signal damaging receivers.

Of course the best idea is to disconnect the RX antenna from the
receiver while transmitting. Any good solution while leaving it
connected?

Now I have a pair of back to back 1N4148 diodes across the receiver
front end but I don't think this offers real protection because they
allow too high voltage before conducting. Also there is a preamp
after the didoes which can bring the RF to dangerous levels!
(Somehow nothing was damaged during last winter operating this way... :)

73,
Paul N1BUG


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