My pieces
ID: 696874
This article refers to the component: To the tube/semiconductor
My pieces
08.Jul.25 19:38
202
I have two of them, one marked "758" with pen on glass, second "926". They have about 350KΩ without heating and ca 60kΩ when 1V was applied to heater. But heater current is much higher - 0.5A at 1V
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My pieces
20.Jul.25 06:22
202 from 270

Hello Mr. Szczesniak,
these are interesting news.
I have a question: Did they have markings on the top from the bulbs? The in rm.org shown example is marked with ink: 40Z.
Thank you and best regards H.-T. Schmidt
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My pieces
20.Jul.25 20:46
258 from 270
Yes. This one with '758' marking has 'Hg', second is '7SH', but im not sure if I correctly recognized letters
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