Quote:
Originally Posted by mole42uk
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?
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From my investigations (above) the answer must be no. What does linking the anodes test for?
Quote:
Originally Posted by mole42uk
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.
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The scans for the Mullard HSVT models are available on GMB's site. These include the layout of the gate switch and schematics of the tester circuits. Tracing the functions of the switches will be straightforward enough but very time consuming since there are 130 of them.