[Hallicrafters] Progess Report #3 of the SX-100 Problem

[jackiv at juno.com]

RON,The old toggle switches get a case of hard grease, a little de-oxit
sprayed in next 
to the terminals will usually free it up. You can hear the change as you
flip it back and forth.
jack   jackiv at juno.com

On Mon, 06 May 2002 15:11:13 -0700 Ronald Oberloh <wa0kds at yahoo.com>
writes:
> OK now if Black Beauties and Tiny Chiefs are suppose to be one of the 
> main failing
> components in this radio I sure am not convinced..  This one almost 
> got me.  I new I
> had bad flat topping audio but then that was what I was suppose to 
> have when the
> Noise Limiter switch  fails in the open mode.
> 
> Think I am finally finished, that is after I replace the switch.  
> Might do an
> alignment on the front end but from what I have tuned in so far it 
> is probably as
> close as I would get it after spending a couple of hours screwing 
> with the coils and
> var caps.
> 
> Ron  WA0KDS
> 
> 
> 
> 
> 
> 
> 
> Dave Moorman wrote:
> 
> > Sounds like you are making good progress, Ron.  The rectangular 
> cap could be
> > a mica cap.  They usually live longer than the tubular paper 
> caps.
> >
> > If a 22K resistor in the subchassis is burnt, the likely culprit 
> is C24, a
> > .02 mfd cap which goes from a transformer pin to ground.
> >
> > Dave
> >
> > > From: Ronald Oberloh <wa0kds at yahoo.com>
> > > Reply-To: wa0kds at arrl.net
> > > Date: Sat, 04 May 2002 14:37:47 -0700
> > > Cc: hallicrafters at mailman.qth.net
> > > Subject: [Hallicrafters] Progess #2 of the  SX-100 Problem
> > >
> > > Got the old RF generator hooked up and found another part bad.  
> This time it
> > > was a cap between the notch module and the subchassis.  470 pf 
> not a cap that
> > > I thought would fit into the list of what I thought were Black 
> Beauties and
> > > not sure if it fits the Tiny Chiefs either  (someone will have 
> to tell me more
> > > about these).  This one looks like a ceramic in a rectangular 
> shape but might
> > > be wrong about this.
> > >
> > > Anyway  it is starting to sound pretty good.   I now have lots 
> of RF gain and
> > > lots of  audio gain.  Also lots of electrical noise.
> > >
> > > Ron WA0KDS
> >
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