[Hallicrafters] More SX99 questions

[n8ie at woh.rr.com]

Thanks Bob,
Can anyone confirm this easily?

When the problem first happened, switching the AM\CW switch made no difference and only a local broadcast station could be heard with the volume cranked. I found the wire loose and soldered it back to V5. This fixed the problem except now when the AVC is on, I get a loud squeal, but the sensitivity works fine otherwise. Sounds like it just slipped far enough away from the tube to loose coupling.

I appreciate all the help guys!

73
Dan, N8IE

---- rbethman <rbethman at comcast.net> wrote: 
> Yep, that is "another" method of creating a gimmick.
> 
> If I'd dig out my SX-99 and look, I could confirm it.  It is sort of 
> buried right now.
> 
> Another project with too little time.
> 
> Bob - N0DGN
> 
> ANTHONY CASORSO wrote:
> > I the Halli sets I am familiar with, the gimmick is just a piece of 
> > standard hookup wire stripped on one end only. The stripped end is 
> > soldered per usual but the other end is just wrapped around a tube 
> > socket pin to provide a few pf of coupling. It should not be connected 
> > directly.
> >  
> > Tony
> >
> > > Date: Tue, 3 Feb 2009 14:10:22 -0500
> > > From: rbethman at comcast.net
> > > To: hallicrafters at mailman.qth.net
> > > CC: n8ie at woh.rr.com
> > > Subject: Re: [Hallicrafters] More SX99 questions
> > >
> > > Dan,
> > >
> > > A "gimmick" is a low value capacitor that is made by twisting what is
> > > usually enameled wire a "few" turns. They were normally a low voltage
> > > component.
> > >
> > > Bob - N0DGN
> > >
> > > n8ie at woh.rr.com wrote:
> > > > While working on getting the SX99 back up and running I have 
> > another question.
> > > >
> > > > One of the main faults was the wire running from pin 3 of V5 to 
> > pin4 of V4 came off. It did not look like it was originally on very 
> > well to begin with.
> > > >
> > > > This wire is shielded and in the schematic is listed in part as 
> > C38 Gimmick 2uF.
> > > > Exactly what is a "gimmick" capacitor?
> > > >
> > > > Thanks es 73
> > > > Dan, N8IE
> > > > 
> 
> -- 
> Bob - NØDGN
> 
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