Audio Asylum Thread Printer

Get a view of an entire thread on one page

FAQ / News / Events

SET Asylum

Urgent help with 300B SET needed

166.102.121.131

I'm looking at buying a get set go amplifier with the optional 300B output tubes. It puts out 5 watts with the 300B. The standard output tube is 6B4G.

http://www.parksaudiollc.com/gsg.html

http://www.diytube.com/phpBB2/viewtopic.php?t=1853&sid=e1749dab905d02b993c5e838e557a668

This particular amp uses James JS-6113HS, which are only 10 watt output transformers. It looks like 60 mA plate current and 410V plate voltage is what the 300B version is spec'd for. Questions:

1) do 300B tubes generally sound good at this plate voltage and current?

2) is a 10 watt OPT a good idea here even if the 300B is run conservatively? Will this sound good or stressed / distorted?

Follow Ups:

RE: Urgent help with 300B SET needed - glenz10183@aol.com 19:28:13 03/12/14 (0)
Nothing wrong with a 10 watt transformer for a 300b amp. However, most 10 watt transformers won't be the end all in the lower frequency area.

-G
RE: Urgent help with 300B SET needed - hifipaul 15:24:50 03/12/14 (0)
Don't know if yr still looking. But, I would suggest you find an amp with a full size xfmr. It makes a big difference in the bass, and the overall sound is less stressed.
RE: Urgent help with 300B SET needed - Frihed89 14:53:15 02/20/14 (0)
Look at the link. It doesn't look that easy with your transformer set up the way it is. Running a 300B at lower plate voltages also lowers power and distortion if you can use different OPs.
Observe, before you think. Think before you open your yap. Act on the basis of experience.
- http://www.westernelectric.com/products/300b_graphs.html (Open in New Window)
RE: Urgent help with 300B SET needed - Caucasian Blackplate 07:15:53 02/20/14 (0)
The power difference between the 6B4G and 300B in that amp are pretty small, I would build it for the 6B4G.

At lower power levels, the 10W transformer should perform well.

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.

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

K&K Audio / Lundahl Transformers

[ K&K Audio / Lundahl Transformers Forum ]