Re: Tube Tester?


"don" <dtfoster@xxxxxxxxxxxxxxx> wrote in message
news:2lnur1pqq662ii7kile39qpcnrcfocpkfu@xxxxxxxxxx
> After retiring from the computer maintenance field, I am going to
> start repairing some old Tube radios my father in law left unfinished
> when he past away. From way back when school I got my electronics
> degree from; it was stated that good in circuit diagnostics was just
> as good as using a tube tester (if you were good at repair).
>
> Is this s true-ism or does one need a tester? Most of radios are 30,
> 40's. A few AK's, but testers didn't go back that far to some of
> their tubes. Thanks for your time and efforts.

Truism (in the absolute sense), no. Generally speaking, yes. In-circuit
testing can quickly lead to the identification of a single fault in
non-feedback circuits. The problem is, of course, there are circuits with
multiple faults and circuits that use feedback (very little of that in the
30s and 40s in non-oscillators; luckily for you).

A tube tester will have to be verified ... don't forget that important point
as you are talking about OLD stuff. OLD test equipment is going to be a big
question mark.

If I were in your shoes, I'd first try to find a source of parts. If you
suspect a tube, having a known good one to plug in is hard to beat.

Have fun and good luck.



.

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