SET Asylum

RE: I'd think 30W out is an impossible number for 2X 300B!

76.22.120.252

In Reply to: RE: I'd think 30W out is an impossible number for 2X 300B! posted by Thomas Martens on March 03, 2008 at 18:17:39

According to the WE table, you can get 14.6 watts from one 300B, running 80mA at 450v plate to cathode, with a 3000 ohm load, just before the onset of grid current, with 5% second harmonic generated by the output tube (i.e. not counting output transformer losses or distortion, and assuming zero driver distortion).

At 2000 ohms load, you can get 17.8 watts at 9% second harmonic distortion.

So it does seem possible if the 300Bs are sufficiently identical (dynamically matched over the operating region), are as well-built as the original production WE tubes, and you can tolerate these distortion levels. Of course, even the best WE 300Bs will (according to WE) have half the normal lifetime at such a hot operating point.

In other words, it may be possible but I would not want to try it!

Follow Ups:

Post a Followup:

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.