Recommended output transistor for Class A amplifier

aldovan · 14th August 2007, 03:32 AM

I need know what transistor is recommended for a single ended Class A amplifier.
I want a transistor with good sound and good termic capacity.
My amp run at 30V x 2A in each output transistor.

Thanks,

Aldovan

EchoWars · 14th August 2007, 10:44 AM

The MJ15003/15004 are pretty tough little TO-3's. If you want to use a plastic package, the MJL21195/21196 will do well.

audiobard · 14th February 2008, 07:55 PM

Hi,
Try MJ15023/15024.They have higher ft (4MHz) then the MJ15001/15003. Don't use high hfe transistor in single ended amps, they will oscillate. I had that problem when I built JLH se amp. I tried to use the 2SC3281, and it didn't work.

aldovan · 14th February 2008, 09:18 PM

Thanks, but I try this transistor and the sound is bad, too.

Leolabs · 15th February 2008, 02:06 AM

Try some Sankens too.

taj · 15th February 2008, 02:42 AM

Quote:

Originally posted by aldovan
Thanks, but I try this transistor and the sound is bad, too.

Hi Aldovan,

I think maybe you should look elsewhere for the reason it sounds bad. Check for incorrect bias; already oscillating; faulty part; incorrectly installed part; wrong value part; poor amp design; etc.

Good luck.

..Todd

14th August 2007, 03:32 AM	#1
aldovan diyAudio Member Join Date: Jul 2005 Location: Campo Grande city	Recommended output transistor for Class A amplifier I need know what transistor is recommended for a single ended Class A amplifier. I want a transistor with good sound and good termic capacity. My amp run at 30V x 2A in each output transistor. Thanks, Aldovan

14th February 2008, 09:18 PM	#4
aldovan diyAudio Member Join Date: Jul 2005 Location: Campo Grande city	output transistor Thanks, but I try this transistor and the sound is bad, too.

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
Can bias transistor mount on top(body) of output transistor??	Leolabs	Solid State	23	16th February 2008 12:35 AM
Design of output inductor for class D amplifier	zilog	Class D	155	26th December 2006 07:10 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

14th August 2007, 10:44 AM	#2
EchoWars diyAudio Member Join Date: Dec 2002 Location: Left of the Dial	The MJ15003/15004 are pretty tough little TO-3's. If you want to use a plastic package, the MJL21195/21196 will do well.

14th February 2008, 07:55 PM	#3
audiobard diyAudio Member Join Date: Jun 2004 Location: Beograd	Hi, Try MJ15023/15024.They have higher ft (4MHz) then the MJ15001/15003. Don't use high hfe transistor in single ended amps, they will oscillate. I had that problem when I built JLH se amp. I tried to use the 2SC3281, and it didn't work.

15th February 2008, 02:06 AM	#5
Leolabs diyAudio Member Join Date: Dec 2004 Location: Bukit Mertajam	Try some Sankens too.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)