Pictures of my amp

markp · 18th June 2004, 04:02 PM

I finally got some pictures of my amp. It is dual mono with voltage regulation on the input/driver stages fed from a seperate winding on the transformer at a higher voltage. There are 4 pairs of outputs per channel with a 6800uF cap bypassed by a polystyrene next to each output, a total of 8x6800 per side. All parts are 1% where possible. Caddock, Holco, and Mills resistors are used throughout. It is based on my schematic that I posted last week. It has been on for 6 years and is played hard almost every day. I designed a two stage power switch which lets the input/drivers stay powered while the outputs can be switched off to save power letting the amp stay warmed-up all the time.

markp · 18th June 2004, 04:04 PM

input/driver and voltage regulator boards

karma · 18th June 2004, 04:27 PM

wow its big how manny watts is it?

markp · 18th June 2004, 04:45 PM

Very conservatively, its 200 watts into 8 ohms. I get close to 400 into 4 ohms. When unplugged it plays for several minutes at normal levels!

karma · 18th June 2004, 04:52 PM

nice im going to add it to my picture gallery

markp · 18th June 2004, 07:54 PM

I forgot to add that all boards are 1/8" thick two ounce copper that I etched myself with the dry transfer method. All wiring is teflon silver with 10ga used on all power rails post bridge. The case is T6061 aluminum ranging from 1/2" to 1/8" thick depending on usage. Input RCAs are WBT and output bindingposts are Edison-Price. Total weight is 75lbs including two 10lb+ torodial transformers.

Brian Donaldson · 18th June 2004, 09:11 PM

Nice home brew heat sinks!

markp · 18th June 2004, 09:18 PM

Quote:

Originally posted by Brian Donaldson
Nice home brew heat sinks!

They really do the job too. I have never seen them get anything more than warm even with some ugly two ohm loads.

18th June 2004, 04:45 PM	#4
markp diyAudio Member Join Date: Oct 2003 Location: L.A., CA	Very conservatively, its 200 watts into 8 ohms. I get close to 400 into 4 ohms. When unplugged it plays for several minutes at normal levels! __________________ If it sounds good... it is good!

18th June 2004, 07:54 PM	#6
markp diyAudio Member Join Date: Oct 2003 Location: L.A., CA	I forgot to add that all boards are 1/8" thick two ounce copper that I etched myself with the dry transfer method. All wiring is teflon silver with 10ga used on all power rails post bridge. The case is T6061 aluminum ranging from 1/2" to 1/8" thick depending on usage. Input RCAs are WBT and output bindingposts are Edison-Price. Total weight is 75lbs including two 10lb+ torodial transformers. __________________ If it sounds good... it is good!

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18th June 2004, 04:27 PM	#3
karma diyAudio Member Join Date: Feb 2003 Location: hamilton,ontario	wow its big how manny watts is it?

18th June 2004, 04:52 PM	#5
karma diyAudio Member Join Date: Feb 2003 Location: hamilton,ontario	nice im going to add it to my picture gallery

18th June 2004, 09:11 PM	#7
Brian Donaldson diyAudio Member Join Date: Jan 2003 Location: Texas, Love it or leave it	Nice home brew heat sinks!

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