Re: Mullard Valve Tester Card Project
In the AVO tester instructions for use it is recommended that double triodes are tested with the anodes linked together. I haven't looked at my ECC8x cards for the Mullard, but could it be that the 'C' card had this function?
The circuit diagrams for the Mullard testers are widely available, AFAIR one of the drawings in my filing cabinet has the contact grid detailed - it has to be fairly trivial to work it out.....I'll happily send a scan of the circuit to anyone who wants to do that.
Richard
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