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Old 7th May 2012, 07:07 PM   #531
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Quote:
Originally Posted by Idefixes View Post
What dou you think of NJW1302/3281 for another BIGBT module since in datasheet they indicate

regards Marc
You can try of course, but 2SC5359/2SA1987 are the winners here.
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Old 7th May 2012, 07:09 PM   #532
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Quote:
Originally Posted by Idefixes View Post
i don't see 9610-12...
It's right there on the chart, I can lend you glasses
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Old 7th May 2012, 07:17 PM   #533
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Quote:
Originally Posted by Lazy Cat View Post
You can try of course, but 2SC5359/2SA1987 are the winners here.
Even not easy to find....at realistic price to have enough for NPN/PNP matching.....

Marc
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Old 7th May 2012, 07:20 PM   #534
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Originally Posted by Lazy Cat View Post
It's right there on the chart, I can lend you glasses
No glasses needed...only good ayes washing up......

Marc
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Old 7th May 2012, 07:28 PM   #535
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New internal layout. More according to my needs. 25x25cm front face. So the two blocs can fit side by side in my furniture. There's enough internal space for +5V/10V more PSU as upgrade.

Regards
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Old 7th May 2012, 10:02 PM   #536
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Really strange problem.

I was so tited yesterday when soldering the amp from first post I discovered today I had a short. No big deal, fixed it. But now I have 25V on the output and the trimmer gets burning hot so I changed them to two parallel resistors... Still getting burning hot and +25v on output.... Have checked everything without success... Any tips??

Thanks...
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Old 7th May 2012, 11:03 PM   #537
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Mouser order placed for TSSA BIGBT HP. It left yet only a few parts. With mouser order i will hava a new bunch of work : pairing input BJT and pairing Vas cascode BJT....

Marc
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Old 7th May 2012, 11:18 PM   #538
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Quote:
Originally Posted by McDaisy View Post
Really strange problem.

I was so tited yesterday when soldering the amp from first post I discovered today I had a short. No big deal, fixed it. But now I have 25V on the output and the trimmer gets burning hot so I changed them to two parallel resistors... Still getting burning hot and +25v on output.... Have checked everything without success... Any tips??

Thanks...
Probably with short happened you got one BJT smoken. You have only 6 active parts that can be checked for functionality in 5 min.

TSSA super basic should work from the start, at the point 1N4148 voltage drop reach +/-0,65V you have bias current through input pair and the outputs. This circuit shouldn't oscillate but anyway check with the scope what's on the output.
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Old 8th May 2012, 12:39 AM   #539
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When the transistors are ok the circuit in post 1 works right away.
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Old 8th May 2012, 07:51 AM   #540
sonnya is offline sonnya  Denmark
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Hi, i have ordered boards and stencils.

This will be fun.
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