Is it a mistake, or are they interchangeable? (Algemeen)
door edison 
, Aveiro - PORTUGAL, 13.03.2022, 18:56 (784 dagen geleden)
Hallo.
I don't think it's a mistake, because the brand is very visible.
![[image]](images/uploaded/20220313175354622e2fb24f6d9.jpg)
![[image]](images/uploaded/20220313175428622e2fd4ebece.jpg)
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From PORTUGAL, with regards
Carlos
Is it a mistake, or are they interchangeable?
Never saw that before.
Misprint or not, I would think that an EBC90 on a spot of an EBC91, and viceverca, will function in most, if not all cases. Only the triode sections differ a bit, but not much.
Greetings,
Robert
Is it a mistake, or are they interchangeable?
door edison , Aveiro - PORTUGAL, 15.03.2022, 01:12 (782 dagen geleden) @ Robert Gribnau
Never saw that before.
Misprint or not, I would think that an EBC90 on a spot of an EBC91, and viceverca, will function in most, if not all cases. Only the triode sections differ a bit, but not much.
Greetings,
Robert
Hallo Robert.
I have some valves with a marking error, but with two references.... I've never seen them either.
Like EBC90, it works fine.
Haven't tested as EBC91 yet.
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From PORTUGAL, with regards
Carlos
Is it a mistake, or are they interchangeable?
door Ouwe Schipper , Sassenheim, 13.03.2022, 19:44 (784 dagen geleden) @ edison
This is what the AMROH valve handbook says
![[image]](images/uploaded/20220313184349622e3b65b091d.jpg)
There is some difference, but not overwhelming
Nico
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een kinderhand
is ook weer gauw leeg
Is it a mistake, or are they interchangeable?
door edison , Aveiro - PORTUGAL, 15.03.2022, 01:13 (782 dagen geleden) @ Ouwe Schipper
Thanks Nico.
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From PORTUGAL, with regards
Carlos
Is it a mistake, or are they interchangeable?
door gertjanrhe , Gooi, 03.04.2022, 12:55 (763 dagen geleden) @ edison
can be it was used at a repair shop and by mistake the wrong box was used to restore the tube after a test was done.
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De techniek was in de jaren 40 veel verder dan menigeen zich bewust is