[Elecraft] K3 VFO tuning hash

[hb9ari]

Dave,

Same noise here (K3#1212) near 28MHz.
May be related to encoder transitions spectrum
falling around this frequency?
With a noise level corresponding to S1 (no antenna),
the VFO tuning noise is peaking to S2;
with antenna, (S4 noise) the tuning noise
is just audible and no Smeter level modification.

73 QRO de Rudolf, HB9ARI

Dave Van Wallaghen wrote:
> John, I just noticed the same thing on 10m the other day. If I used the finger dimple, I could hear it. But if I used the outer rubber ring with 1 or more fingers it would not be nearly as noticable.
>
> I was operating portable in my yard with around 150' of extension cord to power my Gamma PS. 
>
> I thought about searching the archives for something about this. Funny you should mention it.
>
> 73,
> Dave W8FGU
>
>
> -----Original Message-----
> From: John Lawrence <jsl at hughes.net>
>
> Date: Fri, 26 Jun 2009 17:20:59 
> To: <elecraft at mailman.qth.net>
> Subject: [Elecraft] K3 VFO tuning hash
>
>
> Now that 6 and 10 meters have been open to Europe and Africa, I frequent
> these bands for the first time in the six months of owning a factory built K3 radio.
>
> What I've discovered and reported to factory tech support is a very noticable hash noise
> while in the receive mode with any bandwidth centered around 28.000 MHz to 28.050 MHz.  And, it is also
> present while tuning RIT.  It sounds like synthesizer switching noise and its repetition rate increses when the VFO is set to fine
> tuning. I do not hear it on any other band.  I also don't hear it over the entire 10 meter band, just the region as stated.  
>
> Is this in other K3s or is there something going on that needs attention in only my radio?  I called factory tech support over a week ago.  Since they have not come up with an answer it seemed time to open it up to a wider group of users.
>
> Thanks
>
> 73,
>
> John,  W1QS
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