[Techtoolslist] CRT Heater Meter

[Andre Huijts]

Has anyone ever seen or maybe even built one of these (or a similar product ?).

Interested in it because I would like to EXACTLY know what voltage the heater gets from the replacement Amplifone HVTs. After all, the 25” med-res tube I’ve got in my SW cockpit is the only thing I probably will ever have around here….

Schematic looks simple enough…..finding time to build it is something else and regretfully no PCB lay-out with the article…

Cheers, André

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André Huijts
andre.huijts at upcmail.nl