[Elecraft] Receive drops about 6 s-units

[Dick Lindzen]

Many thanks.  Yup, it was the amplifier relay.  I'll try Deox-it and hope for the best.  The relay on the Ameritron AL-800 is not all that accessible, but I think the contacts can be reached.
Dick, WO1I

-----Original Message-----
From: Elecraft [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Dave Hachadorian
Sent: Tuesday, February 16, 2016 9:54 PM
To: Reflector Elecraft
Subject: Re: [Elecraft] Receive drops about 6 s-units


This behavior is frequently caused by oxidation on a normally-closed (relaxed) relay in the antenna chain.  Amplifier relays, bandpass filter relays, antenna selector relays are all suspects.  It also could be a poorly soldered contact in the antenna, or an oxidized PL-259 center pin.  When you transmit, it burns through the oxidation, which lasts only for a while.  A treatment with Deox-it or a relay burnishing tool on the offending contact is the cure.


Dave Hachadorian, K6LL
Yuma, AZ


-----Original Message-----
From: Dick Lindzen
Sent: Tuesday, February 16, 2016 7:45 PM
To: elecraft at mailman.qth.net
Subject: [Elecraft] Receive drops about 6 s-units

I'm having a problem with my K3 (with 2 receivers and a P3). 
While listening for a few minutes, signals drop about 6 s-units. 
Original strength returns when I push the PTT, but the drop returns after a minute or two.  None of this impacts transmit. 
It seems like a bad relay.  Has anyone else encountered this?
73, Dick, WO1I
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