In Reply to: Re: I believe that the design of the Moondogs was DC on the heaters......... posted by Cut-Throat on November 10, 2006 at 13:44:37:
Look at the green 2.5v leads. They lead (with a paralelled hum pot) directly to the heater of the 2A3 via pins 1 and 4. This is the AC heater supply I am referring to.The rectifed signal is used for the 6sn7s, but not the output tube.
I've got 2 schematics (separated by 2 years) for the Moondog and both show the rectified low level supply (BR1), so I am curious why someone thought removing it would be a good thing. Whenever I've seen reference to an AC heater, it always been discussed in context of the output tubes.
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- That's not the heater supply - Bob Rex 14:01:23 11/10/06 (2)
- Tha is the heater supply - Doc B. 16:10:44 11/10/06 (0)
- Re: That's not the heater supply - Cut-Throat 14:10:35 11/10/06 (0)