FS: DIY 2A3 SET amp, or for parts - diyAudio
Go Back   Home > Forums > Commercial Sector > Swap Meet
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Swap Meet Sell your stuff here, who knows, some other fanatic might be interested!

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
Thread Tools Search this Thread
Old 11th April 2010, 09:42 PM   #1
diyAudio Member
Join Date: Sep 2002
Location: Oregon, USA
Default FS: DIY 2A3 SET amp, or for parts

I've tinkered with this for many years, and I've recently switched from HE speakers to dipoles, so it's time to move in a different direction. The amp works fine and sounds good, but I'd recommend buying it only if you are comfortable working on it. I don't have a schematic, and there have been multiple mods made over the years, so there will be some reverse-engineering required.


OPT: One Electron UBT-3
PS transformer, choke, heater transformers: Hammond
Caps: PS electrolytes are Nichicon, coupling caps are Russian surplus (I think teflon)
Tubes: Sovtek 2A3s (I have 2 matched pairs, one set is several years old, the other probably a couple of years old), JJ 5AR4 and ECC99s

The topology is pretty simple. It started as a schematic I found on the JE Labs website, then evolved from there. The PS is a common CLC section with (I think) a 10H choke, then RCRC for each channel. The ECC99s have a battery under the cathode, and are RC coupled to the 2A3s.

I probably have around $400 in the iron, I think I once calculated the whole amp to be around $5-600 in parts. I'd like $150 + shipping, OBO. Paypal preferred. All that iron is heavy, so the closer you are to Portland Oregon, the less shipping will be

Feel free to post here / PM / email with questions.
Attached Images
File Type: jpg IMG_1421.jpg (99.9 KB, 156 views)
File Type: jpg IMG_1422.jpg (130.4 KB, 151 views)
  Reply With Quote
Old 11th April 2010, 09:51 PM   #2
ra7 is offline ra7  United States
diyAudio Member
Join Date: Feb 2009
pm sent.
  Reply With Quote
Old 11th April 2010, 10:27 PM   #3
wildburro audio
diyAudio Member
d to the g's Avatar
Join Date: Aug 2006
Location: minimalopolis
I'll take a spot in line!
  Reply With Quote
Old 11th April 2010, 10:38 PM   #4
diyAudio Member
Join Date: Feb 2008
Location: Niederösterreich
Me three!
  Reply With Quote
Old 11th April 2010, 10:57 PM   #5
diyAudio Member
Join Date: Sep 2002
Location: Oregon, USA
Thanks for the interest. The amp is tentatively sold. If it doesn't work out, I'll contact the next person in line.
  Reply With Quote


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
FS: Hypex Electronics DIY Amp Parts eros28 Swap Meet 2 23rd October 2008 06:30 PM
Any advice on modifying a 2A3 SET amp to parafeed? zman3 Tubes / Valves 4 2nd March 2008 07:30 AM
Another SET 2A3 in the world lquintas Tubes / Valves 15 11th November 2007 04:20 PM
FS: 50W Aleph-X parts set including chassis tiroth Swap Meet 6 19th December 2004 02:34 PM
Iron set for Paraglow (2A3) SET amplifier Alain Favret Swap Meet 1 19th March 2004 06:23 AM

New To Site? Need Help?

All times are GMT. The time now is 04:17 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2