Bottlehead Forum

My heater voltage is 5.8 VDC

69.177.253.69

In Reply to: RE: It's pretty easy posted by Larpy on January 03, 2008 at 14:18:43

As I said, I am electronically challenged. I'm only going by what Mikey, who's forgotten more about electronics than I'll ever know, has done with his 6SN7 FP III.

So I've got a .22 ohm 5W resistor with a 1.2 ohm 3W strapped across its back. I've got 20.97v on H1 and 26.77 on H2, so it is givng me a heater voltage of 5.8. That's a little low, but within 10% of 6.3. Others with more knowledge than I would know if the lower voltage is problematic, and I welcome comments.

I don't think it matters which terminal gets red or black, but I'd keep it consistent across all three tubes. On mine, black goes to 8 on all three tubes and red goes to 7.

Follow Ups:

RE: My heater voltage is 5.8 VDC - Paul Joppa 22:38:40 01/03/08 (2)
- RE: My heater voltage is 5.8 VDC - Larpy 08:39:32 01/04/08 (1)
  - yes (nt) - Paul Joppa 15:03:00 01/04/08 (0)

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