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Old 30th December 2012, 06:12 PM   #201
wg_ski is online now wg_ski  United States
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You better tape the **** out of those primaries before you go winding. And I'm not sure I'd trust that second one at all. Unless the insulation is in a lot better shape than it looks.

I'm not sure all this is going to fit in 4U. Or even 6.
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Old 31st December 2012, 07:44 AM   #202
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Thanks for the advice Mr. WG-SkI
First i will coat them with Vectol Insulating varnish twice,Than will tape with fibreglass Tape,will varnish again and than only will start winding
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Old 31st December 2012, 07:58 AM   #203
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request to all the senior members Please check this circuit for faults, and if any modify it. Thanks and Happy New Year to All
Attached Files
File Type: pdf ALPHATRONICS AMP 20 KW 24-25 du.pdf (66.8 KB, 165 views)
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Old 31st December 2012, 08:31 AM   #204
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Wow, didn't know you could get a toroid THAT BIG!!! I'm in LOVE!!!

I would so have electronosechs with it!

Where in the world can you get/make a toroid like that?
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Old 31st December 2012, 08:38 AM   #205
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Q9, 59 must be MJ15024
Q8, 60 must be MJ15025

You should add a pre-driver, making the output stage a triple. Use the MJE15034 and MJE15035.

I would add a 2.7K in series with the base of Q2 and move the 100pF to the base of same and change to 390pF, this forms a pole at about 125Khz.

Q4 and Q5 should run no more than about 10mA, so R11 and R12 should be more like 390Ω. With 4.3mA though each the voltage drop across 390Ω will be 1.68V, which will make the current in Q4 and Q5 about 10mA.

The amplifier might put out 5KW at 1Ω for a bit before it blows up. The SOA on the outputs is 100W at 100V. Run another supply tier and you could make it work properly in class G or H, or run the other tier from a tracking down-converter like a Sunfire or Bash amplifier.

I'm sure there will be more details, but this is all the time I have for now.
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Last edited by djk; 31st December 2012 at 08:48 AM.
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Old 31st December 2012, 08:44 AM   #206
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Greeting Mr. Workhorse,
This is just a theortical design,I also know that if I make a 20kw per channel and even if I use 15024-25 I will need minimum 2000 of them,in class AB, practically not possible,Just wanted that if seniors like you can check the circuit to make an amp of 4 to 5 kw per channel will be a great help for me
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Old 31st December 2012, 08:48 AM   #207
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Thanks Mr. Djk for your advice
I have noted down the sugetions and modifications you have made and that will be a great help for me. My aim is upto 5 kw. per channel in practical,and for that my newly bought traffo will be enough to power.
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Old 31st December 2012, 08:59 AM   #208
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Those amplifiers are SO BEAUTIFUL they bring a tear to my eye!

You are a genius when it comes to building amps! SO AWESOME!!!!

FAVORITE AMP THREAD!!!!
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Old 31st December 2012, 09:24 AM   #209
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Thanks Mr. EWorkshop1708
Are you there on face book, you can find me there by yhe name Vedmitra Sharma
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Old 2nd January 2013, 07:10 PM   #210
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Anyone checked http://sound.westhost.com/project117.htm

Last edited by wintermute; 2nd January 2013 at 07:19 PM. Reason: replaced link with direct non advertising link.
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