[TenTec] Need knob for Ten Tec 229 tuner

[David Thompson]

Jerry,

You hit the problem on the head.  Its all plastic.  The only metal is the 
flange with 0 to 10 marked on it.  I had a bigger set screw and it was used 
se;dom since last Fall and that set screw has now fallen inside.  I am not 
sure if I want to go to the effort of drilling and tapping.  There is no 
flat edge and the shaft is fiberglass to the set screw digs in.
73 Dave K4JRB

----- Original Message ----- 
From: "Dr. Gerald N. Johnson" <geraldj at weather.net>
To: <tentec at mailman.qth.net>
Sent: Wednesday, February 16, 2011 7:04 PM
Subject: Re: [TenTec] Need knob for Ten Tec 229 tuner


> Is there a flat on the shaft making the set screw need to be at a
> particular position? Somebody drilled and tapped the knob originally so
> it surely can be drilled and tapped at a new place or with a bigger set
> screw. If its all plastic with no metal, the future in all of those is
> not good. There might be a need to drill and tap at an angle to find
> material to hold the set screw and to still hit the shaft close to the
> panel.
>
> Knobs on my Corsair II, especially the bandswitch knob have broken the
> center shaft socket from the knob. I've fixed one or two by fitting bent
> pieces of aluminum to the space and then epoxied the aluminum bits into
> place. On those the setscrew side was OK, just the opposite side of the
> knob broke from the set screw (and turning) pressure and there was not
> enough plastic anywhere else to drill and tap a new hole. I might have
> done about as well to have just pushed the broken parts back together in
> the center and filled the space around them with a thin epoxy and let it
> cure.
>
> There have been knobs that held on to the shaft by a collet that would
> grab the shaft very close to the panel. I don't have any of those, they
> tended to be expensive. But there might be something of that type at
> McMAster-Carr, www.mcmaster.com yet.
>
> 73, Jerry, K0CQ
>
>
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