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Old 5th November 2012, 04:54 PM   #1301
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Hi LC,

This week Nbip3 (alias brother of quasi) is born ( Brother of Quasi ), that's done i can yet go foward on TSSA BIGBT HP. I will not have time in the evening so saturday or sunday i will go on CCSs test.

I have to purchase new filtering/smoothing caps (this i have are old used one....). Have you an advice on µF amount per chanel?

Marc
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Old 7th November 2012, 10:59 PM   #1302
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Nice new amp you have there. TSSA will follow soon. I also like to have more amps in the house, a lot of posibilities to explore, compare, improve, to learn and above all to have fun.

For good smoothing I suggest you from 40 to 60 mF per channel.
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Old 8th November 2012, 01:45 AM   #1303
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Originally Posted by Idefixes View Post
Hi Esperado,

Here's the modification for feedback resistor feeding

Marc
Hi Idefixes,

Nice work. Hope your build went well. You took the audio ground from the wrong point.

A single device is the purest amplifier. Thus the fewer the devices, the better. Keep It as Simple as Possible.

In the hunt for lower THD and DC to light performance we may put together many devices, it works sometimes.

A situation where many devices work together to reduce THD due to random noise cancellation exist, such as used by Self paralleling Op Amps.

Listening Tests are strange things that leave us with even more questions whether something is worth it or not. Thus the refusal of tube gear to die out.

Thank you for your continued contributions to audio.

kind regards,

Harrison.
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Old 8th November 2012, 02:50 AM   #1304
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Listening Tests are strange things that leave us with even more questions whether something is worth it or not.
Yes. I think THD is not a useful concept. Nowadays I don't even look at the THD number in LTSpice. I simply print the FFT from 0v1 to 0v7 or more (up to 2v). From the chart you can see if 0v1 will give higher distortion than 0v2. Or you can see how distortions move with input voltage increase. And many more.
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Old 8th November 2012, 04:32 AM   #1305
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Originally Posted by Lazy Cat View Post
Nice new amp you have there. TSSA will follow soon. I also li 63v
ke to have more amps in the house, a lot of posibilities to explore, compare, improve, to learn and above all to have fun.

For good smoothing I suggest you from 40 to 60 mF per channel.
Ok thanks, i will go for 4x 15.000uf

Marc
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Old 22nd November 2012, 07:10 PM   #1306
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From some regular ELCO producer or more audiophile type?

BTW, you don't know what you're missing ...
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Old 22nd November 2012, 07:25 PM   #1307
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Originally Posted by Lazy Cat View Post
From some regular ELCO producer or more audiophile type?

BTW, you don't know what you're missing ...
Some Rubycon MXR 15000uF 63V that we can found on ebay. I am not an "audiophile" product fan ... in french we said "idiophile" as adiot audiophile....

Marc
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Old 22nd November 2012, 07:57 PM   #1308
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We can do all settings with TSSA PCB without waiting to those Rubycons to arrive. BTW those ELCOS have really high riple current value, nice
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Old 22nd November 2012, 08:08 PM   #1309
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From some regular ELCO producer or more audiophile type?
Just look at the data/price of each: I prefer paralleling little ones to divide serial inductances and resistance.
Have-you tried my stabilized one ? (big caps before Ballasts, parallel after).
LC: i wonder if we can try to study a constant current soft start based on some triac.
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Old 22nd November 2012, 08:14 PM   #1310
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We can do all settings with TSSA PCB without waiting to those Rubycons to arrive. BTW those ELCOS have really high riple current value, nice
I have what i need to do setting test but i missing time for moment. I just transfer last week hifi devices to dedicated room that i was building in my basement house.

Marc
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