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Old 9th November 2007, 06:35 PM   #1
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Default Another SET 2A3 in the world

After a whole year slowly gathering parts all over the world and slowly working (don't have enough time for this), I have finished my first SET 2A3 amp, following the wonderful JE Labs web site

http://members.myactv.net/~je2a3/se300b.htm

The schematic I chose was the stereo SE2A3dx with the James 6123HS outputs

I want to thank you all in the forum who are sharing so much knowlegde and have allowed me, with no experience in this, to be able to build such an amp. I'm not an expert, but it sounds wonderfully. No hum at all (1mV in the output) and power more than enough to make my Dallas II horn enclosures shout.
Only one question: the tubes I am using are 2A3 Sovteks, RCA 6SN7 and Sylvania 76. Is it worth buying better tubes of other brands in order to improve the sound even more? Which ones ?

Thank you very much again


lquintas
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Old 9th November 2007, 06:37 PM   #2
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Another picture
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Old 9th November 2007, 06:44 PM   #3
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and a last one
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Old 9th November 2007, 08:25 PM   #4
Jeb-D. is offline Jeb-D.  United States
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Wow, very nice! Did you cut the wood for the chassis yourself, or did you buy it? Are those Jensen Oil caps I see in there?

I have found Most RCA and Sylvania tubes to be very good. As far as Sovteks go, there have been some I really like and some that are just ok. That is a general statement as I've never worked with thier 2A3's.
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Old 9th November 2007, 11:17 PM   #5
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Yes, I cut the wood myself, two pine wood pieces 1 cm thick glued together. The capacitors are Angela Instruments' ASC oil caps. Thanks for your comment about the tubes.
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Old 10th November 2007, 12:50 AM   #6
athos56 is offline athos56  United States
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Default Hey

I built this amp as my first project! I liked it as well, your looks better then mine did. I'm glad to see that yours looks as packed as mine did underneath. I wish I still had mine, I sold it for parts when I was poor
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Old 10th November 2007, 02:54 AM   #7
JandG is offline JandG  United States
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You did a excellent job. I too am building the JE Labs 45 w/ James 6123,My 1st amp & should be up in smoke or singing by tommorrow evening. If I succed, then I will try the 300B version. I know one thing the qulity of the James OT's surpised the heck out of me, I hope they sound as good as they are built. I like the way you mounted your ASC motor runs. I think I will steal that trick, mounting the clamp upside down w/ no visible clamp up top. I like it... Have you tried any other taps..? I went ahead & solder 4-8- & 16 just so I can try them.
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Old 10th November 2007, 03:33 AM   #8
arnoldc is offline arnoldc  Philippines
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Congrats and nice work!

I also have a JE Labs 2A3 DX and use an all RCA tube complement (76, 6SN7, bi-plate 2A3, 5U4G). The Sovtek is value for money IMHO, I started with that too. The Sylvania 76 is also good as well as the National Union.

I use MagneQuest OPT in mine, the DS-025, but my experience with James says they're very good too. I'm currently using a James JS-6113HS for my 300B.
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Old 10th November 2007, 05:44 AM   #9
athos56 is offline athos56  United States
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I liked how the schematic was complete and the suggested iron was on the page, made the build easier. I had no tube guru near by or a good amp meter so I wasn't ever sure if I had it right But once it successfully produced music I concidered the who thing a success. I'm going with a 12b4a pre and a pair of mono-blocks next; maybe the PP-C1, or something from dynakit, or maybe the Baby heuy or el-cheapo. But the JE-labs stuff was a good start.
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Old 10th November 2007, 06:29 AM   #10
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Nice looking amplifier...what speakers are you driving with it.

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