[ARC5] An unusual cure for a short in a tuning gang.

[AKLDGUY .]

Fair enough. The little hand-operated peaking trimmer mounted
on the front panel can be placed in the Usual Suspect file too.

73 de Neil ZL1ANM


On Sun, Aug 24, 2014 at 12:33 PM, J Mcvey <ac2eu at yahoo.com> wrote:

> In my case , the top trimmers for the osc gang can be unsoldered, which I
> did in an attempt to isolate the problem.
> It turned out to be the in the main variable gang. I suspect that prior
> dissassembly and re-assembly may have caused the fragment issue. The air
> blast did the job... no dropping necessary...
>
>
>   On Saturday, August 23, 2014 6:35 PM, AKLDGUY . <neilb0627 at gmail.com>
> wrote:
>
>
> Aren't there top-mounted trimmer capacitors across all sections?
> Maybe the short was there?
> Aluminium fragments caused by a previous modifier's drilling and filing?
>
> 73 de Neil ZL1ANM
>
>
> On Sun, Aug 24, 2014 at 9:08 AM, Leslie Smith <vk2bcu at operamail.com>
> wrote:
>
> >
> >  Dear list-readers,
> >  I write this posting after reading postings by other contributors
> >  about faulty oscillators in command receivers.
> >  Some time ago I acquired a 'nice' but not-working command receiver.
> >  I traced the fault to the tuning gang - a short between the plates,
> >  measured using a multimeter, with the wire disconnected.
> >
> >  Careful inspection by eye failed to find the short.
> >  Compressed air did nothing.
> >  I spoke with a friend, David Lawrence, about the problem.
> >  David is 'cluey' where valves are concerned.
> >  He gave me the most unusual remedy I've ever heard.  He told me to:
> >
> >  Fold a blanket 2 layers thick and put it on the floor.
> >  Take the  'toobs' out of the receiver.
> >  Hold the radio 60cm above the blanket, level (horizontal) with the
> >  floor.
> >  Drop the radio onto the blanket.
> >  Be careful not to drop the radio on a corner.  (Obvious.)
> >    Then - see if the set works.  It did.
> >
> >  This is a true story, not a joke.
> >
> >
> >  73 de Les Smith
> >  vk2bcu at operamail.com
> >
> > --
> > http://www.fastmail.fm - A no graphics, no pop-ups email service
> >
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