[Boatanchors] newbie question

[J. Forster]

I recently came across a similar issue with transistors as I don't
currently have access to real a curve tracer. So, I built a primitive one.

Just about the same thing can be done to build a simple tube curve tracer.
It just takes a transformer with a filament and plate winding, a couple of
diodes, and a few resistors, a 9V battery and pot, and a tube socket. The
socket can be faked w/ clip leads. Oh, and a 'scope that can do X-Y.

Best,

-John

=================






> I agree.  First use the tube tester to rule out a obvious bad tube then
> proceed to do the more tedious task of checking other circuit components.
> If after that process you don't find a failure then source replacements
> tubes to test the circuit with.
>
> Tom K3TVC
>
>
>
> -----Original Message-----
> From: Bob Macklin
> Sent: Sunday, June 30, 2013 11:38 AM
> To: Glen Zook ; Bill Cromwell ; boatanchors at mailman.qth.net
> Subject: Re: [Boatanchors] newbie question
>
> THE PROBLEM I see is getting a stock of replacement tubes. And there is no
> longer a local drug store to run to to buy tubes.
>
> My position is that for a person that does not have a supply of
> replacement
> tubes available a tube tester is something to consider.
>
> In the past 10 years my Heathkit TC-3 has only found one bad tube. But it
> has helped me to determine I did not have a tube problem.
>
> Bob Macklin
> K5MYJ
> Seattle, Wa.
> "Real Radios Glow In The Dark"
>
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