[Elecraft] K3: Relay noise?

[Steve Ellington]

The relay making the noise sounds like it's on the rear-top side of the K3. 
I doubt if it's pwr sup delta since I can disable vox which results in very 
little current draw but can still hear it. I can slowly close the straight 
key and hear the relay contats close then open the key and hear them open 
just like you would expect any relay to act. Interestingly, pushing the XMIT 
button does not activate the relay and stranger still, while the XMIT button 
is activated, keying the rig does not activate that relay however it 
transmitts normally. Also I doubt if a relay grunt because I can hear the 
mechanical clank fairly well.
73 N4LQ
Steve Ellington
N4LQ at carolina.rr.com
----- Original Message ----- 
From: "wayne burdick" <n6kr at elecraft.com>
To: "Elecraft Reflector" <elecraft at mailman.qth.net>
Sent: Wednesday, February 04, 2009 6:01 PM
Subject: Re: [Elecraft] K3: Relay noise?


> It may be the delta in supply voltage on keydown slightly stimulating
> one or more relay coils. The DC shift could move the contacts a tiny
> bit. Or it might be an extremely small timing window, associated with
> T/R switching, that puts a little glitch on a relay control line.
> Either way it's nowhere near enough to change the state of a relay.
>
> Nothing to worry about; in fact it might be therapeutic. But I'll
> listen for it myself.
>
> 73,
> Wayne
> N6KR
>
>>  My K3 makes a very quiet relay-like keying noise....
>
> ---
>
> http://www.elecraft.com
>
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