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Old 7th May 2012, 01:40 PM   #521
sonnya is offline sonnya  Denmark
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Originally Posted by Lazy Cat View Post
True, so many good sounding systems on a display, Dan's Momentum impressed me the most (among others).

Sonnya, perfectly laid parts on double layer PCB, will look today and report. Have a nice day.
Did you have time to look it over?

I would very much like to hit the "start" button.
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Old 7th May 2012, 02:11 PM   #522
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Just doing it now, what are you, mind reader hehe
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Old 7th May 2012, 04:27 PM   #523
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So i was waiting the new printer...to transfert eagle production on special laser transparent paper. I have bought the H2O2 that lefted. Next step is UV treatment, board revelating, and than eatching.

Marc
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Old 7th May 2012, 05:41 PM   #524
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I achieve with LC help to take mesure of my IRF 610/9610 stock. I apply LC procedure desbribed forward in topic
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Old 7th May 2012, 06:35 PM   #525
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Originally Posted by Idefixes View Post
So i was waiting the new printer...to transfert eagle production on special laser transparent paper. I have bought the H2O2 that lefted. Next step is UV treatment, board revelating, and than eatching.

Marc
Real DIY project, single layer PCB, five jumpers only, printer transfer method, unconventional sch, goood.

BTW, nice looking PCB you have there.
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Old 7th May 2012, 06:47 PM   #526
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Quote:
Originally Posted by Idefixes View Post
I achieve with LC help to take mesure of my IRF 610/9610 stock. I apply LC procedure desbribed forward in topic
Potentiometers on charts hehe, you see how nicely they revealed themselves Sherlock.

Now you can pair them as much as you like, same n-channels, same p-channels, complementary pairs as well, anything you want. For actual BIGBTs take all four IRFs with same resistance (IRF610 - 1,9, IRF9610 - 1,12).

There's even Vgs very similar at both cahnnels, you really can pair them perfectly from the stock you have.

Two words more about forthcoming single BIGBT: 360 Wmax, 30 Amax, 230 Vceo , enormous and linear transconductance - quite a beast.

Last edited by Lazy Cat; 7th May 2012 at 07:00 PM.
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Old 7th May 2012, 06:52 PM   #527
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Originally Posted by sonnya View Post
Did you have time to look it over?

I would very much like to hit the "start" button.
Ufff PCB looks simpler than it is, double layered and SMT, gives me a headache when inspected but I can proudly say: Sonnya you did it !

Now you can push START button.
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Old 7th May 2012, 06:59 PM   #528
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Quote:
Originally Posted by Lazy Cat View Post
Potentiometers on charts hehe, you see how nicely they revealed themselves Sherlock.

Now you can pair them as much as you like, same n-channels, same p-channels, complementary pairs as well, anything you want. For actual BIGBTs take all four IRFs with same resistance.

There's even Vgs very similar at both cahnnels, you really can pair them perfectly from the stock you have.
Ok, so no need to take more at mouser yet. I plane to use pair irf610-8//9610-5 and IRF610-9//9610-1.

Quote:
Originally Posted by Lazy Cat View Post
Two words more about forthcoming single BIGBT: 360 Wmax, 30 Amax, 230 Vceo , enormous and linear transconductance - quite a beast.
Marvelous number. What dou you think of NJW1302/3281 for another BIGBT module since in datasheet they indicate

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NPN/PNP Gain Matching within 10% from 50 mA to 5 A
???

regards Marc
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Old 7th May 2012, 07:03 PM   #529
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Ok, so no need to take more at mouser yet. I plane to use pair irf610-8//9610-5 and IRF610-9//9610-1.
I would rather pair IRF610-1 with IRF9610-1 and IRF610-9 with IRF9610-12

In this way all four BIGBTS will be the same.
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Old 7th May 2012, 07:06 PM   #530
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Originally Posted by Lazy Cat View Post
I would rather pair IRF610-1 with IRF9610-1 and IRF610-9 with IRF9610-12

In this way all four BIGBTS will be the same.

Yes your are 100% rigth, i don't see 9610-12...

Marc
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