[Boatanchors] Tube Testing Help

[Bob Groh]

Here is a link to a homebrew tester:
https://www.valveheaven.com/wp-content/uploads/2015/03/An-inexpensive-easy-to-build-diy-valve-tester.pdf


Looks like a decent starting point.

Bob Groh, WA2CKY

On Sun, Mar 10, 2019 at 1:26 PM Keith Densmore <ve3gem at gmail.com> wrote:

> Hi Group,
> After deciding to upgrade my trusty old Might Mite tubetester, I was
> shocked by the prices going for uncalibrated 50+ year old Hickoks, Westons,
> military units etc. Guess the audio guys are lurking behind this
>
> As an alternative, and as  a learning experience, I would like to try to
> emulate accurate tube testing with the equipment I have on hand. Scopes,
> stable sig generators, regulated B+, Bias and filament voltage sources are
> no problem, I have a well equipped bench.
>
> Ok, so I have looked at some tube tester schematics but they are very
> confusing with umpteen lines going through multiple  sockets and many
> switches.
>
> So what I am wondering is if someone has or knows of some relatively
> simple schematics for testing the various aspects  of a vacuum tube. Most
> important is gm. Second would be power, and mu. Nice would be ability to
> test, measure shorts and gas.
>
> The internet is loaded with tube data so that is no problem. Hope you can
> help.
>
> 73,
> Keith ve3ts
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