O'Neill's Electronic Museum

Penn Valley California

Vacuum Tube Museum

Tubes from other collections

TS = Translation Suspect
All Italics Mine

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Swiss Tubes
Brown Boveri Receiving Tubes (1945).
These are copies of the ECH 21, EBL 21 and AZ 21. Produced for the Swiss broadcast-receiver-industry towards the end of WWII, when the import of the original Phillips became impossible. These types were built for only a short time and today are extraordinarily rare.

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