[ARC5] David Stinson on hi-Z connections.

[Leslie Smith]

Observation by DS:  "Also grounding points that have become "hi-Z".

That is a useful observation.

I have a receiver - didn't work.  Problem was in the IF tuned (tank)
circuits.
One was tens of kHz low, a second was many tens of kHz high.
I could NOT find a reason why TWO IF transformers were off frequency.
Eventually I found that the wipers of the tuning caps were "hi-Z".
Simply working the trimmer or restored the tuned circuit to the correct
frequency.
"hi-Z" is worth considering as a problem.


  Les
  vk2bcu at operamail.com


On Mon, Feb 11, 2013, at 2:06, David Stinson wrote:
> 
> ----- Original Message ----- 
> From: <n2lxm at juno.com>
> 
> >Think about your problem last night. Could the tube socket be the
> > problem ?.
> 
> Bad solder joints (some even look "good") are a common problem.
> Also grounding points that have become "hi-Z".
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