[Milsurplus] ARC-5 Tuning Knob Needed

[COURYHOUSE at aol.com]

SOME HOW  CRAMMING SOME  STIFF HOSE STUFFOVER THE  LITTLE  SPLINE  ON THE  
RADIO AND PUTTING A KNOB ON THE OTHER   END   WHEN i WAS   A KID IN  THE 
GARAGE FIRST PLAYING  WITH THIS STUFF... KIND OF  SLOPPY  BUT  IT    WORKED...  
ED#
 
 
In a message dated 12/5/2017 4:42:32 P.M. US Mountain Standard Time,  
smithab11 at comcast.net writes:

A toothpaste cap works great.
k4che

On  12/5/2017 6:01 PM, Kenneth G. Gordon wrote:
> On 4 Dec 2017 at 21:42,  Richard Solomon wrote:
>
>> I picked up a BC-453 to use on 472  KHz. I need a splined knob to tune
>> it.
>>
>>  There are a number of plastic splined knobs on e-Pay, but not sure  what
>> fits.
>>
>> Anyone got a knob they will  part with ?
>>
>> Tnx es HH, Dick, W1KSZ
> Hello,  Dick. There are at least three versions of a knob the military 
used with  these
> receivers. One, which we call "the wee knob", originally was  included 
fastened under the lid
> of some of the later model AN/ARC-5  receivers. I have not seen any of 
those show up on
> eBay, but I'll bet  they have. The second model, with a small crank on 
it, was used in the
>  repair shops. Those normally sell on eBay for around $30 each. A third, 
much  more rare
> knob was similar to the type 2 above, but had a scale on it.  Those I 
have seen on eBay sold
> for $50 and more.
>
>  Personally, I have never liked any of those OEM knobs as they exhibit a  
terrible amount of
> back-lash, whereas the tuning mechanism in the  receiver itself is 
completely back-lash free.
> They fit very sloppily  on the spline and make zero-beating very 
difficult.
>
> So, I make  my own by cutting off a short section of 1/4" diameter 
hard-brass tubing about  1"
> long or so, cut two slots about 3/8" long parallel to the long axis  of 
the tubing on one end,
> then I drive that "split" end over the  splined shaft, install a good 
knob on the other end (the
> larger the  knob the better), center it up, and, bang!, instant 
back-lash-free tuning  knob.
>
> If you really want to, you can use a bunch of super-glue  to make it so 
it never comes off, but
> I have never needed to do  that.
>
> Ken W7EKB
>
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