CCS for 6V6 PP amp

Jaap · 11th April 2012, 01:03 PM

what is a good CCS in the cathode of a 6V6 amp ? Probably trying blumlein/gartner solution with ccs

TheGimp · 11th April 2012, 01:19 PM

CCS in cathode of pp amp will limit you to class A with it's lower power output capacity. That said, you should get 8W depending on B+. I consider 8W quite sufficient and don't see it as a problem.

The Why a current source? Are you driving only one grid?

If so, the CCS will limit the drive as it will have a minimum voltage across it before it goes out of regulation.

30mA per tube?

I don't think a discrete current source will have a lower dropout than an LM317 as a current source. The LM317 has reasonable noise numbers, so I'd go with it.

Shoog · 11th April 2012, 01:23 PM

I agree that a LM317 regulator is adequate in this roll. I have used them extensively and they worked fine. Zener protect and consider HV versions if going DC coupled. Others have reported improvements with cascade mosfet CCS but I doubt the benefit is worth it.

Shoog

11th April 2012, 01:03 PM	#1
Jaap diyAudio Member Join Date: Dec 2002 Location: Netherlands	CCS for 6V6 PP amp what is a good CCS in the cathode of a 6V6 amp ? Probably trying blumlein/gartner solution with ccs

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Monster Two-Chassis 6V6 PP amp	pjanda1	Swap Meet	0	11th April 2012 02:40 AM
Finished my first PP amp, 6SJ7-6SN7-6v6	athos56	Tubes / Valves	23	7th August 2010 07:26 PM
New Schematic - PP UL 6V6-types, CCS-fed	sorenj07	Tubes / Valves	29	5th August 2009 07:56 PM
For Sale another 6V6 PP tube amp	Sal Brisindi	Swap Meet	2	11th July 2007 01:10 PM
Poindexter's 6v6 PP amp	Cassiel	Tubes / Valves	34	10th October 2005 02:56 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

11th April 2012, 01:19 PM	#2
TheGimp diyAudio Member Join Date: Aug 2009 Location: Johnson City, TN	CCS in cathode of pp amp will limit you to class A with it's lower power output capacity. That said, you should get 8W depending on B+. I consider 8W quite sufficient and don't see it as a problem. The Why a current source? Are you driving only one grid? If so, the CCS will limit the drive as it will have a minimum voltage across it before it goes out of regulation. 30mA per tube? I don't think a discrete current source will have a lower dropout than an LM317 as a current source. The LM317 has reasonable noise numbers, so I'd go with it.

11th April 2012, 01:23 PM	#3
Shoog diyAudio Member Join Date: Aug 2002 Location: Eire	I agree that a LM317 regulator is adequate in this roll. I have used them extensively and they worked fine. Zener protect and consider HV versions if going DC coupled. Others have reported improvements with cascade mosfet CCS but I doubt the benefit is worth it. Shoog