[Hallicrafters] SX-71 Pitch control shaft.

[k0ewu at juno.com]

FWIW  I have a good used SX-71 bfo coil assy with good shaft--$10.00 usd
plus shipping.
Jack       K0EWU at juno.com

On Fri, 1 Apr 2005 11:19:32 +0800 "Peter May" <peter_may at optusnet.com.au>
writes:
> Hi Julian,
> I've encountered the same problem with the SX-71 CW control shaft.
> It seems to be a weakness with this model as they seem to get 
> broken/bent
> during storage or transportation.
> Fortunately I was able to straighten the bent shaft on mine.
> My SX-71 is the next cab off the rank as far as a full restoration 
> goes. My
> motto however is:  "if it aint broke, dont fix it".
> This upsets some of the more dedicated enthusiasts.
> 
> Regards
> Peter May
> 
> Perth, Western Australia
> ----- Original Message -----
> From: "Waldo Magnuson" <magnuson at mac.com>
> To: <hallicrafters at mailman.qth.net>; <julian.bunn at caltech.edu>
> Cc: "Waldo Magnuson" <magnuson at mac.com>
> Sent: Friday, April 01, 2005 12:13 AM
> Subject: [Hallicrafters] SX-71 Pitch control shaft.
> 
> 
> > Hi Julian,
> >      The CW control shaft on my SX-71 was broken too when I got 
> the the
> > receiver.  I removed the assembly and was able to remove the iron 
> core
> > with the brass screw in it.  I then drilled the screw in the core 
> and
> > turned down (step-down) a matching screw and mated the two 
> together
> > with some epoxy glue.  The drill was small (#58 I think) and the
> > turning of the matching screw is delicate lathe work but not too
> > difficult to do.  The end result fixed it like new.  Good Luck.
> > 73,  Skip Magnuson  W7WGM
> > -------------------
> > Julian wrote:
> >
> > I'm resuscitating an SX-71 that arrived in a pretty poor state
> > cosmetically. Electrically, from the limited tests I did, it
> > seems to be OK.
> > One problem is the CW Pitch control.  When I tried to gently 
> straighten
> > the shaft, it broke off ... I then
> > removed the whole control, and disassembled it. The shaft is 
> basically
> > a screw thread with an iron core at the end, that moves in and 
> out
> > of the inductor coil.
> > I'm wondering if I can perhaps simply break off the remaining 
> short
> > copper threaded shaft, and glue a longer replacement shaft onto 
> the
> > iron core piece? I imagine getting hold of a replacement knob is
> > going to be hard.
> > Thanks,
> > Julian
> >
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