[TenTec] Encoder shaft stability

Charles P. Steinmetz charles_steinmetz at lavabit.com
Tue Apr 13 22:36:55 PDT 2010

John wrote:

>I have two Jupiters of 2002 vintage and an OMNI 7.  I removed the 
>Adjustable Drag Bezel (and all associated hardware)  completely on 
>all three units and went to the heavy weighted Orion II Knob with 
>optional Soft Rubber (traction) Ring
>My personal taste is to have the least drag on the Tuning Knob as 
>possible--where I can literally spin it for fast frequency changes 
>if/when desired.  Whereas there is an electronic "Frequency Lock" 
>Pushbutton on all three units--there is no need that I can see for 
>any "drag" to prevent accidental frequency changes--even under (high 
>vibration) mobile operating conditions.

I found that even with the drag components removed, the damping oil 
in the encoder bearing of my RX340 made its action significantly 
stiffer than I wanted, so I took the encoder apart and flushed out 
the damping oil.  I lubricated it with 10W30 Mobil 1.  If I did it 
over again, I'd use something just the merest touch more viscous than 
that -- perhaps 60W racing oil.  I think the 340 knob may be the same 
"weighted aluminum" knob that is available for the transceivers.  And 
yes, it's appalling that the knob skirts are so far off center.

Best regards,


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