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Old 19th April 2012, 08:57 PM   #151
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Quote:
Originally Posted by Idefixes View Post
Note : 0R22 MPC71 and 2N5486/2N5462 are ordered
Very good, please also order SK75/37,5 four heatsinks. SK75 has two pins for which at least one has to be connected to the GND. Consider it as a el. part on PCB, give them a room, not to touch their neigbours, cause they will be hot.

P.S. ... and the name is Lazy Cat

Last edited by Lazy Cat; 19th April 2012 at 09:04 PM.
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Old 19th April 2012, 09:37 PM   #152
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Ultime evolution???

LC, 1mF/10V et 2.2mF/10V will be panasonic FC. Both exist in 10mm diam.

Marc
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File Type: jpg TSSA_BIGBT_HP_50vdc_V6_brd.jpg (235.5 KB, 970 views)
File Type: jpg TSSA_BIGBT_HP_50vdc_V6_compo_brd.jpg (189.8 KB, 860 views)
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Old 19th April 2012, 10:25 PM   #153
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Quote:
Originally Posted by Lazy Cat View Post
Very good, please also order SK75/37,5 four heatsinks. SK75 has two pins for which at least one has to be connected to the GND. Consider it as a el. part on PCB, give them a room, not to touch their neigbours, cause they will be hot.

P.S. ... and the name is Lazy Cat
Here it is....KSC/KSA was just at the right place....needed any layout modification were necessary to fit SK75 in.

Marc

PS :"s" gone ....replaced by "z"
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File Type: jpg TSSA_BIGBT_HP_50vdc_V61_brd.jpg (239.2 KB, 815 views)
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Old 19th April 2012, 10:30 PM   #154
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Quote:
Originally Posted by Idefixes View Post
Here it is....KSC/KSA was just at the right place....needed any layout modification were necessary to fit SK75 in.

Marc

PS :"s" gone ....replaced by "z"
WOW , one little sexy PCB, congratulations Marc
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Old 19th April 2012, 10:36 PM   #155
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Quote:
Originally Posted by Lazy Cat View Post
WOW , one little sexy PCB, congratulations Marc
Thanks....was possible only beacause your help....when i see first version, i mesure the road to the final one.

Thanks a lot, yet i must go for bom and purchase. With single side i can easy do it at home on standart PCB board 160x140. Just a "last" advice...: i have on hand 4x 22.000f 63v screw caps chemi-con U32D. Will that be enough for two channel or should i add 2x10.000 per board or 2x 22.000 U32D per bord for smoothing?

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Old 20th April 2012, 07:42 AM   #156
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Quote:
Originally Posted by Idefixes View Post
Thanks....was possible only beacause your help....when i see first version, i mesure the road to the final one.

Thanks a lot, yet i must go for bom and purchase. With single side i can easy do it at home on standart PCB board 160x140. Just a "last" advice...: i have on hand 4x 22.000f 63v screw caps chemi-con U32D. Will that be enough for two channel or should i add 2x10.000 per board or 2x 22.000 U32D per bord for smoothing?

Marc
Nature of the forum is to make things together, faster, in a boost like way. Some designs are successful, some so much that goes to commercial production and sold on ebay by third parties, etc.

4 x 22 mF/63 V is more than enough for two channels at +/-50 V, of course all depends on your's speaker impedance, but for 4 ohm would be OK. I suggest to make the amp as dual mono normally if you have two separate transformers.

The PCB looks really great and I have to inform you that there will be some three resistors more on it, I will draw it and explain why. Don't worry nothing special but now is the time and will give us much easier job later.
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Old 20th April 2012, 07:54 AM   #157
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Quote:
Originally Posted by Lazy Cat View Post
4 x 22 mF/63 V is more than enough for two channels at +/-50 V, of course all depends on your's speaker impedance, but for 4 ohm would be OK. I suggest to make the amp as dual mono normally if you have two separate transformers.
I think i have enough transformers (500Va 2x36Vac) for dual mono .... take a look picture under

Click the image to open in full size.

Don't know what futur is made from so i think to had 2x10000f per board.

Quote:
Originally Posted by Lazy Cat View Post
The PCB looks really great and I have to inform you that there will be some three resistors more on it, I will draw it and explain why. Don't worry nothing special but now is the time and will give us much easier job later.
I have been waiting for modification

Marc
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Old 20th April 2012, 09:02 AM   #158
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Why you put that remote ''on'' thing? Is it for home theater installations? And how can we skip it locally on board? Maybe better include a 3 way small switch that provides +12V (on), 0V (mute), remote, positions?
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Old 20th April 2012, 09:06 AM   #159
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This update enables TSSA BIGBT HP to be even more universal:
- serial diode MUR160 plus 22 ohm resistor in power supply rails helps to improve PSRR
- +/-OPT pins enables to connect separate power supply for the front-end (MUR160 and 22 ohm are omitted)
- power supply LED indicators for both front-end and output stage are present
- serial compensating resistor added to NTC (serves to calibrate NTC thermal response)
- serial resistors added to SK75 heatsink's GND connection (serial RC filter)
- 1 uF/63V decoupling capacitors added close to VAS transistors supply rails
- TLP627 input now accepts 12 V remote signal (serial resistor added)
- LT1034 replaced by TL431
- R2-R9 values stated for +/-50 V power supply rails

And that's about it.
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Last edited by Lazy Cat; 20th April 2012 at 09:20 AM.
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Old 20th April 2012, 09:10 AM   #160
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Quote:
Originally Posted by Salas View Post
Why you put that remote ''on'' thing? Is it for home theater installations? And how can we skip it locally on board? Maybe better include a 3 way small switch that provides +12V (on), 0V (mute), remote, positions?
Hi Salas

No, TLP627 serves to switch output transistors on/off, practically replaces an output relay.
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