Dropping rectifier filament voltage

[dsavitsk]

Originally posted by Nightpuma
Regarding the ying/yang schottkys, that sounds intersting, but what would the benifit be besides less heat?

There won't be less heat -- that was Poinz' point. W=VI. The advantage, if there is one, is that diodes drop the same voltage regardless of current draw which might make them easier here -- though it might also make their use more difficult if the drop is not what you need. The disadvantage as per rdf could be switching noise.

[dsavitsk]

Originally posted by dsavitsk
Push Pull 2A3's draw 5A.

D'Oh. I skipped over the word rectifiers and just read power amp heaters. Anyhow, a pair of 6CJ3's will draw over 3A.

[Poindexter]

Wasn't I casual not to gig you about that?  I am such a nice guy.

But; yes, with rectifiers you got to be careful because some of those bad boyz' heaters can draw some serious current.  At first I wasn't too worried because after all it's a preamp, but then who sez it's a preamp-style rectifier?  Why not make a coolio lineamp PS starting with a 5U4?

You've seen those 300B lineamps, I bet.

Aloha,

Poinz

[disco]

Originally posted by Nightpuma ... Do any of you know if it would be OK to drop the voltage to 4VCT with resistors considering B+ is to be taken from the CT?

Take the HT from the filament of the AZ1 so it won't pass the 0.5 ohm resister. Have you tried the #80 rectifier?