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Old 6th December 2006, 09:50 PM   #1
lgreen is offline lgreen  United States
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Default Monster Output Stage- 2 KW

For those of you who need high power, see the attached output boards, labeled "2KW Power Board." I took these pics with my phone at the surplus store so that's why the quality is awful, but no one ever liked my pics anyway....

6 rows x 11 TO-220 output devices per row (2 rows have 12), placed on a flat copper bar with a hollow copper tube running below the length of the bar. Rubber tubing connects to the copper tubes so that you can put water or some other liquid in the tubes to cool down that bad boy.

The boards include 0.1 ohm emitter power resistors and other components.

Picture #3- top and bottom of 2 boards
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Old 6th December 2006, 09:52 PM   #2
lgreen is offline lgreen  United States
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Default Pic#08

Picture 08- as close up as i could get with my cell phone, top view

Looks like there are diodes and base resistors, in addition to the emitter resistors, for every transistor.
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Old 6th December 2006, 09:53 PM   #3
lgreen is offline lgreen  United States
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Default Pic 09

Pic 09- bottom of board, note that the V+ and V- go to copper bars. Based on my quick look, I think that the hollow copper tubes are live, which would make the water (if that is used) inside them live too!

The hollow copper tube is sized such that it is small enough for the TO-220 emitter and base pins to be soldered directly to the PCB.
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Old 6th December 2006, 09:54 PM   #4
lgreen is offline lgreen  United States
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Default pic#10- 2 boards

Pic10- top view of 2 boards.

Yes, they have 5 so you can use this for your 10.0 KW home theater system.

Price- $20 for each board. The boards looked to be in great shape too. Now if only we could find some speakers to connect these to.......

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Old 6th December 2006, 10:22 PM   #5
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Quote:
Originally posted by lgreen
no one ever liked my pics anyway
How dare you say a thing like that !

TO220 ? => I've gone blind, Ma (TO3)

20 bucks is cool.
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Old 6th December 2006, 10:30 PM   #6
lgreen is offline lgreen  United States
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Quote:
Originally posted by jacco vermeulen


TO220 ? => I've gone blind, Ma (TO3)

20 bucks is cool.
I am an idiot! TO-3!!! TO-3!!! TO-3!!! TO-3!!! TO-3!!! TO-3!!! TO-3!!! TO-3!!!

FYI, the copper you see on the underneath of the board is not a trace, its a copper bar that is attached via rivets to the board. In fact, quite a few things were rivited to the board.
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Old 6th December 2006, 10:42 PM   #7
kvholio is offline kvholio  Netherlands
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no one liked your pics ? then i must be no one.
You're one of the few true diy'ers.
Looks meaty btw. Some industrial application ?

With kind regards,

Klaas
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Old 6th December 2006, 10:43 PM   #8
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Old 6th December 2006, 10:54 PM   #9
imix500 is offline imix500  United States
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It's very possible those were pass regulators used in industrial ion lasers. I've got a crate full of those things somewhere.
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Old 6th December 2006, 11:32 PM   #10
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And what part numbers are those TO-3's?

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