RE: Or, in other words,

Tube DIY Asylum

Do It Yourself (DIY) paradise for tube and SET project builders.

In Reply to: RE: Or, in other words, posted by Eli Duttman on September 22, 2017 at 02:22:27:

Ah, good to know!

So yes, figure the backwards-wired 115V+115V:115V transformer isn't 1+1:1.04 at all. Losses involved. 1+1:1.35?

So it's probably best to use the N-68X wired as normal, with voltage doubling DC rectification. So you get half the current output. With an N-68X I should get 120*2 = 240VAC, rectified to 240*1.3(ish) = 312VDC under load. Correct?

312V*0.1A = 31.2VA, which is within the 50VA rating.

But 312V*0.2A = 62.4VA, and that's too far over the 50VA rating. Gotta bump up to the N-77U for a small stereo power amp. Oh well...
--

This post is made possible by the generous support of people like you and our sponsors:

Parts Connexion

Follow Ups Full Thread

Topic - Backward Power Transformer - Triode_Kingdom 21:05:07 09/21/17 (6)

RE: Backward Power Transformer - dandeman 06:45:20 09/27/17 (0)

RE: Backward Power Transformer - Paul Joppa 21:24:04 09/21/17 (4)

Or, in other words, - sser2 22:22:53 09/21/17 (3)

RE: Or, in other words, - Triode_Kingdom 07:26:18 09/22/17 (0)

RE: Or, in other words, - Eli Duttman 02:22:27 09/22/17 (1)

RE: Or, in other words, - rongon 20:04:49 12/25/19 (0)

Follow Ups

RE: Or, in other words, - rongon 20:04:49 12/25/19 (0)

FAQ

Post a Message!

Forgot Password?

Moniker (Username):
Password (Optional):
	Remember my Moniker & Password (What's this?) Eat Me
E-Mail (Optional):
Subject:

Message:	(Posts are subject to Content Rules)

Optional Link URL:
Optional Link Title:
Optional Image URL:
Upload Image:
E-mail Replies:	Automagically notify you when someone responds.

To view your new posting or follow-up, click on the RELOAD or REFRESH button on your browser.