Looking for goodme proven 2A3 SE project

slav · 9th April 2011, 09:22 AM

Hi to All
As in the title I am looking for well designed 2A3 SE project , 8-10W under 8ohm load , so far I found Andrea Ciuffoli's PSE amp ( I wonder if anyone built that one ?).

Evenharmonics · 9th April 2011, 03:46 PM

Quote:

Originally Posted by slav

8-10W under 8ohm load

You want 300B for such output, not 2A3.
TubelabSE Manual
JE Labs 300B SE Amp

boywonder · 9th April 2011, 06:21 PM

Furthering what Evenharmonics mentioned above, if you are married to the 2A3, the 2A3 will also pop right into the TubelabSE but you will end up with something less than 8W (around 3-4W). You need different B+ voltage, Filament voltage, and maybe a different output transformer primary impedance.

Tubes and Transformers

slav · 9th April 2011, 08:00 PM

I was thinkig about parallel SE , which gives something about 8W ,but it's quite expensive (four matched2A3 woul cost a fortune) , so 3000B SE it is .Which design would be the best and what suitable speakers to match it?Curently I'm using ProAc Tablette 2000 (87-88dB) wit El34 PP , listening to all kind of music from jazz to The Cure , Depeche Mode ,Prince ,classical etc

costis_n · 9th April 2011, 08:14 PM

Quote:

Originally Posted by slav

I was thinkig about parallel SE , which gives something about 8W ,but it's quite expensive (four matched2A3 woul cost a fortune) , so 3000B SE it is .Which design would be the best and what suitable speakers to match it?Curently I'm using ProAc Tablette 2000 (87-88dB) wit El34 PP , listening to all kind of music from jazz to The Cure , Depeche Mode ,Prince ,classical etc

With this kind of speaker sensitivity (which also implies a complex crossover) , the best design would be a El34 PP

slav · 9th April 2011, 08:23 PM

As I said I will be looking for new speakers

euro21 · 9th April 2011, 09:09 PM

D3a (cascode CCS anode load) with Powerdrive source follower, 300B SE (380-400V, 70mA)
6W A1 mode, up to 10-11W A2 mode.

Evenharmonics · 9th April 2011, 11:27 PM

Quote:

Originally Posted by slav

As I said I will be looking for new speakers

These speakers are made for low power SET amps.

tinitus · 9th April 2011, 11:32 PM

any SE amps with 3x 6V6 in paralel ?

slav · 9th April 2011, 11:35 PM

Hi
What about 300B in parallel , it should give reasonable power to source any speakers ?

9th April 2011, 09:22 AM	#1
slav diyAudio Member Join Date: Mar 2010	Looking for goodme proven 2A3 SE project Hi to All As in the title I am looking for well designed 2A3 SE project , 8-10W under 8ohm load , so far I found Andrea Ciuffoli's PSE amp ( I wonder if anyone built that one ?).

9th April 2011, 09:09 PM	#7
euro21 diyAudio Member Join Date: Sep 2004 Location: Budapest	300B SE, Powerdrive D3a (cascode CCS anode load) with Powerdrive source follower, 300B SE (380-400V, 70mA) 6W A1 mode, up to 10-11W A2 mode.

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9th April 2011, 06:21 PM	#3
boywonder diyAudio Member Join Date: Jan 2008 Location: So.Cal.	Furthering what Evenharmonics mentioned above, if you are married to the 2A3, the 2A3 will also pop right into the TubelabSE but you will end up with something less than 8W (around 3-4W). You need different B+ voltage, Filament voltage, and maybe a different output transformer primary impedance. Tubes and Transformers

9th April 2011, 08:00 PM	#4
slav diyAudio Member Join Date: Mar 2010	I was thinkig about parallel SE , which gives something about 8W ,but it's quite expensive (four matched2A3 woul cost a fortune) , so 3000B SE it is .Which design would be the best and what suitable speakers to match it?Curently I'm using ProAc Tablette 2000 (87-88dB) wit El34 PP , listening to all kind of music from jazz to The Cure , Depeche Mode ,Prince ,classical etc

9th April 2011, 08:23 PM	#6
slav diyAudio Member Join Date: Mar 2010	As I said I will be looking for new speakers

9th April 2011, 11:32 PM	#9
tinitus diyAudio Moderator Join Date: Nov 2005	any SE amps with 3x 6V6 in paralel ?

9th April 2011, 11:35 PM	#10
slav diyAudio Member Join Date: Mar 2010	Hi What about 300B in parallel , it should give reasonable power to source any speakers ?

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