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RE: Eastern Electric M520 service literature

Move your question over to the Tubes DIY section and you will greatly improve your chances of getting a useful answer.

The M520 is the classic Mullard El34 circuit and the basic schematic is simple. Worst case, a competent tech should be able to get it working again at least with manual functions. In other words, give you a manual volume pot and switches for triode/pentode/ultra linear.

I wish they still sold the M520. I would buy one.

Good luck.


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