To avoid the Philips penthode patent,Tungsram and Radio Record made a special kind of tetrode with penthode characteristics. In most tube manuals they are listed as a penthode.
Dimensions (WHD) incl. pins / tip
50 x 128 x 35 mm / 1.97 x 5.04 x 1.38 inch
Weight
59 g / 2.08 oz
Literature
Taschenbuch zum Röhren-Codex 1948/49
- - Manufacturers Literature
T1304
Peter den Boer
T1304
Peter den Boer
T1304: own collection
Peter den Boer
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