[Elecraft] KX3 encoder: mechanical noise?

[Wayne Burdick]

Robert,

There should be virtually no electrical drift. It's likely to be  
either mechanical or firmware.

First try locking the VFO (hold KHZ for 3 seconds). Does it still  
drift? If so, then firmware could be causing the drift, typically  
because MIC BTN is set to PTT.UP.DN but the mic is something other  
than an MH3. If you're using an MH3 and still see firmware-based  
drift, there could be problem with one of the resistors in the mic or  
on the control panel board.

If there's no drift when the VFO is locked, then the cause must be  
mechanical, and you should be able to eliminate it by having the knob  
lightly compress the felt pad.

If this doesn't help, please contact customer support tomorrow.

tnx
Wayne
N6KR



On Jul 19, 2012, at 7:10 PM, va3bxg at gmail.com wrote:

> My issue is that the radio drifts. I have tried tightening the  
> screw, loosening it. Removed the felt, put it back on
>
> And I still get the drift
> Sent from my BlackBerry device on the Rogers Wireless Network
>
> -----Original Message-----
> From: Rick Tavan N6XI <rtavan at gmail.com>
> Sender: elecraft-bounces at mailman.qth.net
> Date: Thu, 19 Jul 2012 13:25:43
> To: Sullivan, Mike C<mike.c.sullivan at lmco.com>
> Cc: elecraft at mailman.qth.net<elecraft at mailman.qth.net>
> Subject: Re: [Elecraft] KX3 encoder: mechanical noise?
>
> Dunno if it was the same cause, but I, too, had a scraping noise when
> turning the VFO knob. It didn't happen on every turn and it "moved"  
> around
> the circumference, so it didn't seem to be the knob bottoming out on  
> the
> clear plastic bezel. But it was. I removed the rubber ring around  
> the knob,
> loosened the set screw and lifted the knob ever so slightly above the
> bezel, tightened the nut and the noise was gone.
>
> /Rick N6XI
>
> On Thu, Jul 19, 2012 at 10:43 AM, Sullivan, Mike C <mike.c.sullivan at lmco.com
>> wrote:
>
>> I also have this 'scrapping' noise - very light and does not happen  
>> at the
>> same spot every turn. Are there bearings in encoder - maybe a ball or
>> roller with a flat spot on it that drags when the flat spot comes  
>> around?
>> Or a bearing separator that is bent somehow?
>>
>> Mike Sullivan
>> KX3 #600
>> 73 W5EEA ..
>>
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>
>
>
> -- 
> Rick Tavan N6XI
> Truckee, CA
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