MY AMB BETA-22 S.V.

A new version of my balanced Beta-22 with alps rk-50; a new power section with 2 160VA 2X30V Nuvotem-Talema toroidal transformers and 4 Hammond chokes; wired with 21.5 AWG up-occ 7N copper . Of course the rest of components is only first choice like vishay-dale resistors or nichicon muse capacitors.Gain is 5X for each board. Built by Atelier Audio, Lisbon, Portugal, E.U.

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May 28, 2012

Jan 29, 2013

Feb 6, 2013

Mar 26, 2013

Comments (22)

rosgr63 5/29/12 at 9:40am

Beautiful, very nice professional work, well done!

alota 5/29/12 at 11:47pm

thank you dear friend!

rosgr63 5/30/12 at 5:35am

Aldo è cattivo ragazzo
Now I must not buy tubes and save money!

alota 6/2/12 at 5:54am

good choice

preproman 9/25/12 at 9:32am

Looks really good. Can you provide a picture of the finished product?

rosgr63 9/25/12 at 9:53am

I can't wait to see this beauty!

preproman 2/6/13 at 8:27am

The finished product looks really good Aldo. I sure would like to take a listen to it. Let me know how the HE-6 does with it.
Congrats man.. It was a long road.

realmassy 2/6/13 at 8:58am

Nice! But 24 kg??? Are you sure it's still an headphone amp??

axellone 2/6/13 at 9:06am

Alleluja!!!! ;o)

rosgr63 2/6/13 at 9:08am

Congratulations!
Very, very nice.
How does it sound?
I like the Cabo Verde style!
Happy Listening

alota 2/6/13 at 11:58am

thank to all friends. it´s a miracle.
realmassy: if you want is a speaker amp

rosgr63 3/26/13 at 10:43am

Fantastic Aldo!
Congratulations my friend!
Can I become your slave for one month so I can listen to it?
I'll be very good, I promise, not a Diavolo Tentatore!

alota 3/26/13 at 2:13pm

you don´t need. you´re the master :-)

rosgr63 3/26/13 at 9:34pm

You must post your impressions, we are waiting!

alota 3/27/13 at 7:24am

of course!

rosgr63 3/27/13 at 8:28am

Mi piace il colore nero!!!!!!!

alota 3/29/13 at 11:11am

depravato!!!

rosgr63 3/29/13 at 11:22am

Ragazzo Cattivo!

alota 3/30/13 at 3:22am

SICURAMENTE!!!!

e19650826 4/23/13 at 8:58pm

You aren't really utilizing the external heatsinks. Maybe you can rearrange things a little to mount the output MOSFETs directly onto the sinks (as oppose to use the tiny sinks on-board,) then you can turn up the idling current by quite a bit. Probably not necessary, since B22 in default setting is already deeply biased into Class-A, but it just doesn't feel right to see those beautiful sinks not used.
Anyway, nice build!

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