[Elecraft] noisy VFO's

[Benson Wills]

You might try wrapping the felt, torroid-like, with Teflon pipe thread tape. 

NE4W


Sent from my Cap'n Crunch decoder ring

On Dec 13, 2011, at 5:13 PM, Keith Heimbold <ag6az at hotmail.com> wrote:

> Dale,
> 
> That describes the noise I hear as well.
> 
> Let me know if the oil treatment works.
> 
> Regards,
> 
> Keith
> AG6AZ
> 
> Sent from my iPhone please excuse typos
> 
> On Dec 13, 2011, at 12:29 PM, "Dale Boresz" <dmb at lightstream.net> wrote:
> 
>> Hello Natan,
>> 
>> I can hear the same thing here. Decent high frequency hearing and a 
>> reasonably quiet shack are prerequisites to hearing it though. It's a 
>> 'shhhhh' sound that occurs as a result of the surface of the knob 
>> dragging against the felt as the VFO knob is spun. I've considered 
>> applying a light coat of mineral oil to the felt washer to quiet it 
>> down, but haven't tried it yet. NOTE: I am not recommending this; I was 
>> just thinking about trying it...
>> 
>> 73, Dale
>> WA8SRA
>> 
>> 
>> 
>> On 12/13/2011 11:03 AM, Natan Huffman wrote:
>>> Hello All,
>>> 
>>> Last Friday I took delivery of a new K3 along with a P3 and lots of
>>> accessories including Fred Cady's book on the K3.  Only problem to date is
>>> "noisy" VFO knobs.  The technique to lessen drag does decrease or eliminate
>>> the noise which sounds like fingernails dragged across a chalk board and I
>>> do find that noise most objectionable.
>>> Of course I can free myself of the noise by backing off the knobs but I'm
>>> left with no noise, and no drag at all.  So my choices are no noise, or no
>>> drag.  No drag leaves me with a
>>> surprisingly free turning VFO knobs that is problematical and proper drag
>>> leaves me with that horrible scraping which for me is simply intolerable.
>>> 
>>> Has anyone come up with this same problem and has found proper mitigation
>>> solution?
>>> 
>>> Thanks,
>>> 
>>> 
>>> 
>>> Natan W6XR, C6AXR, VS6KR
>>> Freeville, NY
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>> 
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