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Old 25th April 2012, 09:24 PM   #281
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Quote:
Originally Posted by sonnya View Post
I would love too be there but i cannot find space in the calendar next week. I have two orders that needs to be shipped next week. And we are running as fast as we can. Where in sweden are you located?
Probably top range models shipment, I assume only these can stop you from visiting Munich.

Where did you get that, connecting me with Sweden I've never even visited it, although I would love to. No Sweden, Slovenia is the country of my origin, still.
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Old 26th April 2012, 05:18 AM   #282
sonnya is offline sonnya  Denmark
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No, it is electronic parts for home-care equipment. It is booming.

I don't know where i got this idea from that you are from Sweden!??? Now when i look at you flag i can see it!!

Then we will able to meet next year!?
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Old 26th April 2012, 08:17 AM   #283
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LC, you have a private massage inbox

Marc

Edit : I take a look at my parts stock : i have 12x IRF610 and 17x IRF9610
Hopefully, i can try to mesure stock par this week-end to see if i need to order more or not mosfet driver...I have no 12V accu but a single 0-12V power supply 7812 base regulated.

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Old 26th April 2012, 09:28 AM   #284
sonnya is offline sonnya  Denmark
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Am i missing a schematic of a TSSA with CCS???? Or am i dreaming???
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Old 26th April 2012, 12:14 PM   #285
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Exclamation TSSA Basic 1.1

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Originally Posted by Joachim Gerhard View Post
Sure, i just build it as is to study it. What do you think to replace the 1kOhm resistors with CCS´s ? Gives more open loop gain but stability has to be watched.
Gerhard and all interested, I finally found spare moment to make an upgrade to basic version, now with CCS integrated.

I'm sure this would measure even better than the first basic version built by Sonnya, sound quality should follow as well.

Regards, Andrej
Attached Images
File Type: jpg TSSA Basic.jpg (444.2 KB, 368 views)

Last edited by Lazy Cat; 26th April 2012 at 12:23 PM.
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Old 26th April 2012, 12:15 PM   #286
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Originally Posted by sonnya View Post
Or am i dreaming???
Not anymore.
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Old 26th April 2012, 12:37 PM   #287
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Originally Posted by Lazy Cat View Post
Gerhard and all interested, I finally found spare moment to make an upgrade to basic version, now with CCS integrated.

I'm sure this would measure even better than the first basic version built by Sonnya, sound quality should follow as well.

Regards, Andrej
Few more words about TSSA Basic 1.1
- CCS pair transistor's flats should be glued together
- input pair transistor's flats should be glued together
- BF245B source-gate resistor value for Id=2 mA
- 500 ohm MT (multi turn) trimmers set output bias current (0,25-2A) and output DC offset (zero volts)

Amplifier power output 50 Wrms/4 ohm.
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Old 26th April 2012, 12:49 PM   #288
tinitus is offline tinitus  Europe
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Originally Posted by Lazy Cat View Post

Amplifier power output 50 Wrms/4 ohm.
I thought that would be into 8ohm, with +/-32V
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Old 26th April 2012, 01:25 PM   #289
sonnya is offline sonnya  Denmark
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Originally Posted by Lazy Cat View Post
Gerhard and all interested, I finally found spare moment to make an upgrade to basic version, now with CCS integrated.

I'm sure this would measure even better than the first basic version built by Sonnya, sound quality should follow as well.

Regards, Andrej
The OLG will not change much. The open loopgain is more or less set by the RC divided by the feedback resistors which are => 2K2/(36R||1K) => 2K2 / 34 => 65gg

It is multiplied by: (RLOAD/(1/gfs)).

For the exicon (10N20 and 10P20) it is: gfs = 2.5S @ ID=2.5A.

=>

65gg x (8/(1/2.5)) => 1300gg or 62dB.
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Old 26th April 2012, 01:41 PM   #290
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Quote:
Originally Posted by tinitus View Post
I thought that would be into 8ohm, with +/-32V
56 Vpp is max output voltage swing just before clipping, so if power supply can deliver current, max output power will be 49 Wrms/8 ohm or 98 Wrms/4 ohm.

I stated output power at -3 dB, so more relaxed, unclipped, not heavily distorted one.

Last edited by Lazy Cat; 26th April 2012 at 01:45 PM.
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