Hickok CA-5 test adaptor for model *539B Hickok tube tester.
This adaptor allows you to test the more modern
tubes that the "B" models does not have sockets for such as
compactrons, large novar and others.
I have replaced the original grid/plate lead
(that had hardened) with a new one of the proper type wire. I've cleaned, serviced and tested the above and
it works fine. Except for a small surface scratch near switch "C", it's cosmetically excellent. I include
the set-up manual for model 539B that includes general info for use
with other models. The manual does not include the setup data needed
to set up other model testers.
Instruction manuals and tube test set-up charts available for the above and other models >