[Hallicrafters] SX-101 Question

[Mark K3MSB]

Unless you are planning on leaving power applied to your SX-101A all the
time, I wouldn't worry about the longevity of the 12BY7A.

I don't leave power applied to any BA gear unless I'm in the house.   It
only takes 30 Min or so for the 101A to stabilized from a cold start, maybe
a bit longer on the higher bands.

Mark K3MSB

On Tue, Jun 15, 2010 at 9:34 PM, Larry <lkirkland at sc.rr.com> wrote:

> On 6/14/2010 10:24 AM, Larry wrote:
> > Over the weekend I picked up a very nice SX-101 MKIII with great
> > cosmetics.  I am going to re-cap it over the next few weeks.  One thing
> > that puzzles me is the "Pointer Reset" knob.  How does it work?  Does it
> > mechanically move the pointer or does it do it electrically by shifting
> > the local oscillator freq?  The reason I ask is that the shaft appears
> > loose or disconnected over about a 45 degree rotation with hard stops on
> > each end of the rotation.  What's involved on getting access to the
> > mechanism?
> >
> > This is my first SX-101 and am looking forward to getting it up and
> going.
> >
> > Thanks,
> > Larry W4LK
> > ______________________________________________________________
> >
> >
> I took the front panel off and found that the Pointer Reset knob and
> shaft was connected to a pawl that pushed the entire pointer assembly
> left or right along a slide.  The slide is assembled with 2 loose
> fitting screws with nylon washers to allow it to slide easily.  Someone
> had really torqued those 2 screws down tighter than Dick's hatband.  It
> might have slid some if whacked with a sledge hammer!  I loosened up the
> two screws and it now works as advertised.
>
> I brought the old girl up on a Variac and it began to make noise, but
> the 1st local oscillator was not working.  This is the tube that the
> filament stays on even when the power is switched off.  I had read that
> you need to be prepared to replace the tube every year or so.  It is a
> 12BY7 (which are not cheap).  I put a new one in and it now plays pretty
> good.
>
> When I recap a receiver, I usually buy the capacitors from Dave at DH
> Distributors in Witchita.  I can't raise him on his landline.  Is he
> still in business?
>
> Thanks,
> Larry W4LK
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