[TenTec] Encoder shaft stability

[James C. Owen, III]

This is an interesting discussion on the Encoder's. I have one of the original Jupiters, built November 2000. It has a LOT of use as it's on daily from early morning til late at night. I have only the slightest movement on the main tuning, so small you have to be looking for it visually as it's not noticed when tuning. The smaller encoders have some movement with the multi  having the most. Again I don't notice it while turning and have to look for it visually. Makes me wonder it the first Jupiters used a different encoder. BTW I have had only one problem in 10 years and that was a bad relay in the LPF.
73 Jim



----- Original Message ----
From: James Viars <james.viars at comcast.net>
To: Walt Amos <waltk8cv4612amos at att.net>; Discussion of Ten-Tec Equipment <tentec at contesting.com>
Sent: Wed, April 14, 2010 6:04:23 PM
Subject: Re: [TenTec] Encoder shaft stability

Please don’t get me wrong, the Jupiter is still an awesome radio. They just should have done the dials better.

James Viars

-----Original Message-----
From: tentec-bounces at contesting.com [mailto:tentec-bounces at contesting.com] On Behalf Of Walt Amos
Sent: Wednesday, April 14, 2010 5:05 PM
To: Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] Encoder shaft stability

AH, makes you want to get out the old check book and really order one RIGHT 
AWAY ................

Walt K8CV Royal Oak, MI.


----- Original Message ----- 
From: <james.viars at comcast.net>
To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
Sent: Wednesday, April 14, 2010 11:08 AM
Subject: Re: [TenTec] Encoder shaft stability


>
>
> Sounds good. All the dial shafts of my Jupiter have some sort of flex to 
> them: VFO, xit/rit, multi, etc...
>
>
>
> I have tried a few different things to keep out the wobble, but to no 
> avail. The most annoying thing is that the tension on each smaller dial is 
> different. Actually, the PBT dial SQUEEKS!!
>
>
>
>
>
> James
>
> N4EGA
>
>
>
>
> ----- Original Message ----- 
> From: "Phil Chambley Sr." <k4dpk at comcast.net>
> To: tentec at contesting.com
> Sent: Tuesday, April 13, 2010 7:23:53 PM GMT -05:00 US/Canada Eastern
> Subject: [TenTec] Encoder shaft stability
>
> I've been toying with an idea and would appreciate input from the group.
>
>
>
> Haven't had any experience with the Orions yet, but every on other T/T rig 
> with an encoder, I've seen varying amounts of encoder shaft wobble. If you 
> lift up on the front of the knob, it'll move noticeably and irritatingly 
> (at least to me).
>
>
>
> The reason for this is T/T relies on the encoder bushing alone to serve as 
> the only bearing surface, and that single-point bearing allows lateral 
> "wiggle". I think we can give the encoder a two-point support with just a 
> minimum amount of effort.
>
>
>
> What I have in mind is a circular piece of say, 1/16" Teflon sheet, about 
> 1 ½" diameter, with a ¼" hole in the center. Using a nibbler, cut out a 
> bite every ¼" or so from inside of the hole so small "fingers" would be 
> left to contact the shaft. This would encircle and hold the shaft and 
> still have only a minimum of surface contact area.
>
>
>
> Then attach the Teflon disc under the knob to the plastic bezel using pins 
> or #2 machine screws. The latter would be placed outside the track of the 
> tension arrangement.
>
>
>
> Comments please?? Better idea anyone?
>
>
>
> Phil C. Sr.
>
> k4dpk
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