[Elecraft] K3 Tuning Knob (was: K3 Tops the List!)

[Stewart Baker]

Beware...
Initially I installed just one felt washer. After a short time I 
noticed the tuning knob was binding against the plastic panel. 
This can cause scratching of the surface.

I put the other washer in place and that gave sufficient spacing, 
however when the knob was turned it made a rubbing noise.

I raided the XYL's material supply, and made up 2 washers from a 
softer felt. Problem solved.

73
Stewart G3RXQ
On Sun, 17 Feb 2008 14:26:48 -0800 (PST), Don Rasmussen wrote:
> Double Ooops?
>
> Same here although I never went back to read the
> instructions - installed ONE felt washer, set the knob
> with minimal friction - could not be happier...
>
> Time to change the doc? !!! ;-)
>
>
> [Elecraft] K3 Tuning Knob (was: K3 Tops the List!)
> Bill W4ZV btippett at alum.mit.edu
> Sun Feb 17 16:53:34 EST 2008
>
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> Tops the List!)
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> ----------------------------------------------------------------
----------------
>
>
> Barry N1EU wrote:
>
>> I also found the K3 to be a great performer in the
> tough condx this
>> weekend.
>>
>> I must quibble a bit about the tuning knob however.
> I find it just about
>> impossible to adjust it for slight damping without
> feeling asymmetric drag
>> against the felt washer.  I can't get it to feel
> smooth, yet damped.  I've
>> been very careful in making slight adjustments and
> just can't find a sweet
>> spot.  I'm not loving the felt washer adjustment
> system - am I missing
>> something?
>>
>>
> Likewise here operating single band 160 in the
> contest.  I have 306 Qs in 74
> countries before our final hour of darkness, including
> at least two other
> K3s (VP6DX and F5VJC).  I've not heard *any* IMD
> products the entire weekend
> and this included Friday night when I operated with
> the preamp on just to
> see if I might induce some (before the QRN front then
> over Texas got
> unbearable).
>
> Regarding the Main VFO knob, when I finished my unit I
> found I had a felt
> washer left over.  Re-read the instructions and found
> I only installed one
> washer...oops!  However, my knob action is silky
> smooth, spins freely and
> yet has positive action and never counter-rotates when
> it stops.  That's
> exactly how I like it so I'm not adding the second
> washer.  Others may want
> more friction but this is perfect for me.
>
> 73,  Bill  W4ZV
>
>
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