[Boatanchors] Replacement Part Query

[Jim Wiley]

Todd -


You might consider a small drive chain as a replacement.  The ones 
available from hobby stores for R/C models, for example.  Sprockets to 
fit 1/4" shafts are readily available.  You could even use the chain on 
the existing "wheels" by providing some additional side-supports of 
plastic or metal that keep the chain from slipping off the "wheel".   
With care, backlash could be minimized.  Since this is not a 
frequency-determining part of the transmitter, some looseness could be 
tolerated.   Using a stiff tension spring to couple the ends of the 
chain could go a long way here.  An internet search for "drive chain" 
turned up several possibilities.


- Jim, KL7CC



Todd, KA1KAQ wrote:
> Have been in the process of restoring a nice set of Heathkit Indians
> (Apache & Mohawk) to put back on the air. The Mohawk is set and the Apache
> would've been, but a final checkout before re-installing in the cabinet
> produced a snapped copper(beryllium?) tuning strap for the FINAL control. I
> would guess by the looks of this one that it is a fairly frequent failure
> part in rigs that see a lot of use. This one has been repaired at least
> twice, including a piece spliced into it. Apparently this made the strap
> too long, so the original owner ran it below one of the other shafts to
> take up the slack, adding tension into the equation and assuring a future
> failure.
>
> Before attempting to make one, which will require tracking down the
> material and tools to properly fabricate it, does anyone make replacement
> straps? If not, I'll probably go with something along the lines of the
> material used in tie wraps or another durable plastic rather than this
> stuff again.
>
> Thanks -
>
> ~ Todd,  KA1KAQ/4
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