We picked-up an at-least-third-hand Tri-Ex 3-54 crankup with a bad sheave
in 1975. Airplanes use a lot of sheaves/cables for control systems. Took
the old sheave to local airport repair business where they had a bin full
of used sheaves, many sizes, and picked out one for a couple bucks that was
a close enough fit...probably came out of a DC-3 or Cessna, something like
that, was much better quality than the original. Likely wouldn't want to
pay new prices but aviation rules require decommissioning a lot of
perfectly good stuff after so-many flight hours. That same tower is still
up today, used over the years with 2-el HFquad, VHF, WX stn and various
antenna experiments.
Depending on your level of desperation, of course...
Don N7EF
On Sat, Aug 24, 2013 at 4:40 AM, Nick Pittner <Goodsonrd@netwalk.com> wrote:
> I have a Hy-Gain HG-70HD tower, new in 1985. I'm in the process of
> refurbishing it and would like to replace the cable sheaves and related
> hardware as part of the process, but am unable to locate a source for those
> items. MFJ still sells the towers but apparently does not sell the parts
> and they have not been helpful. Does anyone have information as to where I
> can find these parts or sufficient information that I could have new ones
> made in advance of disassembling the tower? I'm also looking for a thrust
> bearing assembly for the tower. Any information would be most appreciated.
> Thanks for your help.
>
> Nick, K8NAP, goodsonrd@netwalk.com
>
>
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