My K3 makes a very quiet relay like keying noise as well. Been
meaning to chase it down, but haven't had the time. There was once a
suggestion that it could be a protection circuit due to high SWR, but
there's no reason why that should be happening. I haven't tried
disconnecting the speaker just to make sure it isn't an electronic
artifact, but it sure sounds mechanical, and occurs even with headphones,
volume, and power turned all the way down.
On Wed, 4 Feb 2009, Doug Faunt N6TQS +1-510-655-8604 wrote:
> There's a relay that switches with mode change, CW/Data to SSB/AM.
>
> 73, doug
>
> X_CMAE_Category: 0,0 Undefined,Undefined
> Date: Wed, 04 Feb 2009 10:29:07 -0500
> From: Don Wilhelm <[email protected]>
>
> Steve,
>
> No relay for either keying or T/R switching - it is all electronic.
>
> 73,
> Don W3FPR
>
> Steve Ellington wrote:
> > Is there a mechanical relay that follows keying? I've had my K3 for
> nearly a
> > year and didn't notice any relay noise until lately. I know the antenna TR
> > is done by pin diodes but I can now hear the faint click of a small relay
> > that wasn't there before. I'm using ver. 2.8
> > Steve Ellington
> > [email protected]
> >
> >
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