LC, by the way, I haven't really established the ground setting. I'm thinking using the remaining big portion into ground plane by using jumper connection of wires. Which point should I take off from ? bottom center is a good choice ? (where junction of trafo & reservoir)
How will the 1uF paralleled would help ? (curiosity ~ !)
As for to filter ripples from supply rail, should I use a 1uF or 0.1uF cap ?
And how to determine the amount of bias for driver ?
Regards, Leong.
How will the 1uF paralleled would help ? (curiosity ~ !)
As for to filter ripples from supply rail, should I use a 1uF or 0.1uF cap ?
And how to determine the amount of bias for driver ?
Regards, Leong.
I am in
myabout SSA: great design but the secret of good sound is current NF😎
Thanks, agree totally.
Hi guitar 89
I suggest you to use double "battery" pack power supply (separate +Vcc-00, -Vcc-0), GND meeting point on a PCB.
Driver's bias current usually set to class A regarding their output "drive" current to the next stage.
I suggest you to use double "battery" pack power supply (separate +Vcc-00, -Vcc-0), GND meeting point on a PCB.
Driver's bias current usually set to class A regarding their output "drive" current to the next stage.
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I'm using single transformer for 2 channel, so I suppose I have to branch out each lead into 2 for each channel ? If I were to meet both secondary's 0V to form ground, then how will be the further connection form the ground ?
About the bias, I assume class A range is the Driver's half maximum output ? Is it roughly 75mA for 100W, 25mA for 50W ? (just guessing the amount... how to calculate/estimate the driver's drive current)
Housekeeping added. Next step is mount to regular heatsink, test, then second channel:
Sheldon
Sheldon
Attachments
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SSA BIGBT HP finished amplifier
I started this thread 9 months ago (how symbolic), continuing from here and today I finally made an amplifier that is finished, tested and auditioned to my friends.
It was a big pleasure making SSA BIGBT HP, learning process all the way, meeting new friends on the forum and continuing to develop new amps in TSSA thread.
Some pics from today's assembly and later music session in a system consisting of Clearaudio Ovation, MC Cartridge Stradivari V2, Nano Phono Preamp, Absoluta Talia stereo preamplifier, Magico V3 speakers, Ktema speakers.
Regards, Andrej 😉
I started this thread 9 months ago (how symbolic), continuing from here and today I finally made an amplifier that is finished, tested and auditioned to my friends.
It was a big pleasure making SSA BIGBT HP, learning process all the way, meeting new friends on the forum and continuing to develop new amps in TSSA thread.
Some pics from today's assembly and later music session in a system consisting of Clearaudio Ovation, MC Cartridge Stradivari V2, Nano Phono Preamp, Absoluta Talia stereo preamplifier, Magico V3 speakers, Ktema speakers.
Regards, Andrej 😉
Attachments
Superb design and craftsmanship! Wow!
BTW my latest iteration above, mounted on a proper heat sink is thermally well behaved. Driver bias goes quickly to 9.5mA, then over several seconds to about 11mA. Over the next few minutes it hits a maximum of about 12mA, then settles over the next few minutes back to about 11mA where it stays. DC offset changes a maximum of +/- 15mA, and settles within +/- 10mA. All quite acceptable.
Next is channel two, then plug it into the main system for a listen. Will probably take me a few weeks, between other things.
Sheldon
BTW my latest iteration above, mounted on a proper heat sink is thermally well behaved. Driver bias goes quickly to 9.5mA, then over several seconds to about 11mA. Over the next few minutes it hits a maximum of about 12mA, then settles over the next few minutes back to about 11mA where it stays. DC offset changes a maximum of +/- 15mA, and settles within +/- 10mA. All quite acceptable.
Next is channel two, then plug it into the main system for a listen. Will probably take me a few weeks, between other things.
Sheldon
Thanks Sheldon 🙂
You see, SSA beast can be thermally tamed, now it's like a pat.
DC offset is OK, no need for servo at all.
Just take it slowly, in that way you have firm control, plus no stress. 😎
Thank you Igor. 😉
Four hours of listening the upper setup showed the SSA amp can drive low efficiency/low impedance speakers effortlessly. Very transparent, high resolution, full harmonic presentation from 12" black discs. 😎
In the SSA - TSSA - Music Veritas
Andrej
My SINCERE CONGRATULATION to Yours Great Success
in making Yours SSA AMP 
such an Outstanding Performer while singing with (my faw. LP) - Vinyls.
Congrats to Yours fine assort. of the equipments selection You have.
I just imagine how You and the Yours friends were nice Touched with Pure & Pleasant
of Rich SOUND to all Souls being there....
I wish You all the nicest music enjoyment in the future . . .
Andrej My SINCERE CONGRATULATION to Yours Great Success
in making Yours SSA AMP such an Outstanding Performer while singing with (my faw. LP) - Vinyls.
Congrats to Yours fine assort. of the equipments selection You have.
I just imagine how You and the Yours friends were nice Touched with Pure & Pleasant
of Rich SOUND to all Souls being there....
I wish You all the nicest music enjoyment in the future . . . Maybe more than 4 hours perhaps ?I'm sure you were in heaven for those four hours...
After effect 
My SINCERE CONGRATULATION to Yours Great Success
such an Outstanding Performer while singing with (my faw. LP) - Vinyls.
Congrats to Yours fine assort. of the equipments selection You have.
I just imagine how You and the Yours friends were nice Touched with Pure & Pleasant
of Rich SOUND to all Souls being there....
Thanks for good wishes Smiley 🙂
Yes, all the way analog chain was the best performer in given system. Vinyl with analog recording material still holds the magic in music reproduction.
I'm sure you were in heaven for those four hours...
Maybe more than 4 hours perhaps ?
We were enjoying all the session and it was, as usual, unawarely over too quick. 😀
Thanks for good wishes Smiley 🙂
Yes, all the way analog chain was the best performer in given system. Vinyl with analog recording material still holds the magic in music reproduction.
Somehow analogue most often sounds like music and can give a lot more emotional fulfilment than can processed digital signal .🙂 The technical argument that digital source is more accurate does not hold water for me as it all too often cannot reproduce that magic which analogue so often does produce! This differential, for me at least, makes me very suspicious that the present state of art measuring instruments are usually measuring the wrong parameters.😉
Well done!!😎
I heard very good digital master tapes but somehow it does does make it on a medium we can access. Refference Recordings sells copies of their mastertapes but then we are stuck with classical and maybe not the best preformance.
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