Cobalt SET 45

MagneQuest/Peerless Forum

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I want to build a tube amp, and one of the options I've zoned in on is Kurt Strain's Cobalt SET 45:

http://www.magnequest.com/diy2.htm

Is the current EXO-45 a drop-in replacement for the cobalt version in the schematic? I don't suppose Magnequest is thinking of building any more cobalt transformers?

The plate choke, EXO-004, is no longer listed in the catalog. What would the equivalent be? BCP-15?

I wonder if Kurt ever made any changes to the circuit in the 14 years since it was published? I have searched and found a few older posts, but nothing recent.

I also wonder what changes might need to be made for this amp to run a 50 output tube, or maybe to run in A2. I think I will need a bit more power for my speakers, which are ~96db 1W/1m.

Thanks!

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Topic - Cobalt SET 45 - tgnade 11:16:24 11/02/15 (8)

RE: Cobalt SET 45 - mqracing 18:07:53 11/04/15 (2)

RE: Cobalt SET 45 - tgnade 06:42:20 11/07/15 (0)

RE: Cobalt SET 45 - tgnade 10:49:39 11/05/15 (0)

RE: Cobalt SET 45 - tgnade 00:18:53 11/03/15 (3)

RE: Cobalt SET 45 - mqracing 09:39:44 11/04/15 (2)

RE: Cobalt SET 45 - tgnade 12:27:09 11/04/15 (1)

RE: Cobalt SET 45 - mqracing 18:05:35 11/04/15 (0)

RE: Cobalt SET 45 - Paul Joppa 14:54:42 11/02/15 (0)

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