https://audiomix.no/shop/power-tubes/6761-lm-ericsson/
I have access to some 6761 tubes, and I'm wondering if anyone can give me some good advice regarding schematics, connections, etc. I was thinking about both SE and PP connections. I understand that these are tubes that are not originally made for audio, but a lot of tubes are made as transmitter tubes, used in TV, and so on. I understand that the tubes in the link are longlife, and with gold pins, which might be a sign of good quality? Thanks in advance
Tilbakemelding
I have access to some 6761 tubes, and I'm wondering if anyone can give me some good advice regarding schematics, connections, etc. I was thinking about both SE and PP connections. I understand that these are tubes that are not originally made for audio, but a lot of tubes are made as transmitter tubes, used in TV, and so on. I understand that the tubes in the link are longlife, and with gold pins, which might be a sign of good quality? Thanks in advance
Tilbakemelding
6761 seems to be much like EL82. Much more than EL84, which is lower current tube, while EL86 as a sweep tube is higher current tube.
Directly from the tube data I can see, that as PP UL (fixed bias) some 15 W...18W is realistic with +Ub = 220...250 V, Ra-a = 5kΩ.
Concerning the schematics, any normal cathodyne or LTP can be used with a triode or a pentode as a voltage amplifying stage.
I have used the attached circuit a lot.
Directly from the tube data I can see, that as PP UL (fixed bias) some 15 W...18W is realistic with +Ub = 220...250 V, Ra-a = 5kΩ.
Concerning the schematics, any normal cathodyne or LTP can be used with a triode or a pentode as a voltage amplifying stage.
I have used the attached circuit a lot.