[Hammarlund] Unstable Oscillator adjustments in the HQ-180

[manualman at juno.com]

Do you perceive that the slugs are loose or exactly what does "touchy"
mean?

Pete, wa2cwa

On Sun, 31 Jan 2016 18:45:08 -0600 "K3PID" <Ron.K3PID at sbcglobal.net>
writes:
> It's not a drift problem! The VFO is rock stable after a short 
> warm-up. I
> made the addition of the separate filament supply for V2 & V18. The 
> problem
> ( or perceived problem ) is touchy transformer adjustments! I 
> watched Pete,
> K7PP adjust the transformers on his YouTube video and they did not 
> appear
> touchy at all.
> 
> 
> -----Original Message----- 
> From: manualman at juno.com
> Sent: Saturday, January 30, 2016 4:27 PM
> To: hammarlund at mailman.qth.net
> Subject: Re: [Hammarlund] Unstable Oscillator adjustments in the 
> HQ-180
> 
> Try a different 6C4. 6C4's can be very flaky at times.
> 
> Pete, wa2cwa
> 
> 
> 
> On Sat, 30 Jan 2016 15:19:30 -0700 RAY FRIESS <rayfrijr at msn.com> 
> writes:
> > The old tube rigs, while great radios, were susceptible to drift 
> and
> > stability problems, mostly for a while after first being turned 
> on.
> > That's why we would often turn them on (or in the case of the
> > Hammarlund rigs, set the clock timer to turn on the rig) for about
> > 30 to 60 minutes before we were ready to do some serious 
> operating.
> > This would allow them to become as stable as they could, and would
> > cut down the amount of drift substantially.   I would recommend
> > doing the same thing before you make adjustments and
> > aligning.   It might help.
> >
> >
> > > From: Ron.K3PID at sbcglobal.net
> > > To: Hammarlund at mailman.qth.net;
> > Hammarlund_moderated at yahoogroups.com
> > > Date: Sat, 30 Jan 2016 16:12:21 -0600
> > > Subject: [Hammarlund] Unstable Oscillator adjustments in the
> > HQ-180
> > >
> > > I’ve been working on my HQ-180 and have had some success but I
> > have discovered that while all  the adjustments in the ANT and RF
> > section are nice and stable easily adjusted for peak, the
> > transformer adjustments in the HF OSC section ( T23 thru T27 ) are
> > very touchy and might even be called unstable.  Has anyone else 
> ever
> > encountered this? Any speculation on possible causes?
> > >
> > > Regards
> > > Ron K3PID
> > >
> > >
> > >
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