Quote:
Originally Posted by Zenith6S321
Yes it would be nice to collectively put together a database to make the tester more useful for all. I took a look at the 121 schematic, but I doubt there is enough information to try to reverse engineer it and come up with card designs from tube specifications.
Dave
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Not sure about the 121, but you can develop your own test cards for the 123 and 1234, and the different variations on these, including the military AN/USM-118. I have the Western Electric variant (KS-15874-L2), and the instruction manual has explicit instructions on how to make up a custom test card given a basing diagram and basic tube specifications. Mine came with a good supply of the blank cards and the hole punch.
I don't have the "full" set of test cards, but most of the ones that I am missing are the "later" types, mostly series string stuff.