LevinGuitar
Well-known member
- Joined
- Jun 13, 2019
- Messages
- 406
I've bought the preamp because of the transformer with the idea of using it in a LDC microphone but since the preamp is so beautiful and well built I'm tempted to use it with my CK61 spare capsule. The preamp fits well in the 460 body (even it's way longer) so I could even use a bigger and better output capacitor. Other options are modern and shorter SDC body but they are also wider.
The main question is what tube to use and what biasing. I guess the transformer ratio is around 10:1? so any of the tubes I have should work well: 5718, 5719, 6S6B-V, EC70, 5840W, 5703WB. But I imagine that the biasing should be completly different with a 6.3v heater voltage from modern PSU.
This will be a long project so any ideas about the body or circuit are welcome
The main question is what tube to use and what biasing. I guess the transformer ratio is around 10:1? so any of the tubes I have should work well: 5718, 5719, 6S6B-V, EC70, 5840W, 5703WB. But I imagine that the biasing should be completly different with a 6.3v heater voltage from modern PSU.
This will be a long project so any ideas about the body or circuit are welcome
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