[TenTec] PTO adjustment

[banda5 at comcast.net]

Steve,

I wonder if the "pistol' is bent on your PTO that drags. Can you see the tuning knob out of center as you spin it.

I just did my C2 PTO at Xmas and am at 3 washers on it - I think it slips sometimes lately though even with 3 washers as evident on the freq displayed.
My tuning knob does seem out of center slightly and I should have rolled the pistol on a flat surface to check the run out on it when it was last rebuilt. I will do this this winter.
I rebuilt my Delta 580 with just 2 washers and it was still much smoother than my C2.

I am thinking its possible that additional washers could be needed to compensate for a pistol that is not true and causing extra friction.

Somthing to think about or check.

Good luck,

Aaron / N9SKN

-------------- Original message -------------- 
From: Steve Hunt <steve at karinya.net> 

> Over the past 12 months I've completed 3 PTO rebuilds on my Corsairs and 
> remote VFO. In all cases I ended up putting 3 washers under the lugs of 
> the rear plastic retaining cap to get the sort of "feel" I like. Despite 
> that, one of the three is significantly "stiffer" than the other two - 
> it's quite noticeable when all three are in front of you and you're 
> swapping from one to the other. 
> 
> I have 2 questions: 
> 1) Has anyone ever tried 4 washers each side? Is there enough thread 
> length on the bolt to accommodate this? Does the drive begin to slip at 
> this stage? 
> 2) Has anyone tried to make the adjustment variable - for example by 
> placing springs under the lugs, and adjusting the retaining screws for 
> the required "feel"? Or do you think this arrangement would allow the 
> cap to move laterally, or to tilt, and cause its own problems. 
> 
> It seems to me that 2) could also be useful if the drive begins to slip 
> - you could simply tighten the back screws slightly :) 
> 
> Failing that, I guess I'll just have to select alternative thickness 
> washers that do the job. 
> 
> 73, 
> Steve G3TXQ 
> 
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