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 Power Supply
 12/120V inverter again
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audioguru
Nobel Prize Winner

Canada
4214 Posts

Posted - Jan 25 2007 :  9:29:56 PM  Show Profile  Reply with Quote
I can't find the huge power amplifier on the web anymore. It used transmitting tubes from a powerful radio station. Their filaments used many amps of current. The high voltage power supply used many amps of current when it was heating the train tracks that were its load.
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Binary 1011001101
Nobel Prize Winner

United Kingdom
569 Posts

Posted - Jan 26 2007 :  02:36:59 AM  Show Profile  Reply with Quote
The person must have bypassed the main fuse in his house, which is illegal. If there are not any pictures I dont think I can believe that!
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Aaron Cake
Administrator

Canada
6702 Posts

Posted - Jan 26 2007 :  09:36:11 AM  Show Profile  Visit Aaron Cake's Homepage  Send Aaron Cake an ICQ Message  Send Aaron Cake a Yahoo! Message  Reply with Quote
Guys, in order to keep this topic useful (it has over 60,000 views!) please keep it on topic. Thanks.
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tim
Mad Scientist

198 Posts

Posted - Jan 27 2007 :  2:56:35 PM  Show Profile  Reply with Quote
i agree lets keep it ALL inverter related. is there anyone out there that could find out a specific transistor number cross reference? the number is KSP44-013, ALL I COME UP WITH IS KSP44 WHICH IS NOT WHAT THIS IS , AND ITS OUT OF AN INVERTER AND THE RESISTORS COME OF IT AND GO TO THE GATE OF THE MOSFET . ITS JUST ONE OF THOSE LITTLE BLACK TRANSISTORS WITH 3 LEGS. IM NOT SURE BUT IT MIGHT BE AN NPN.
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tim
Mad Scientist

198 Posts

Posted - Jan 27 2007 :  2:58:07 PM  Show Profile  Reply with Quote
WHEN THE MOSFET IS SHORTED IN ANY WAY THAT TRANSISTOR BLOWS UP.
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Binary 1011001101
Nobel Prize Winner

United Kingdom
569 Posts

Posted - Jan 27 2007 :  4:04:40 PM  Show Profile  Reply with Quote
Are you sure it is the KSP44-013 If I type it in google it comes up with a link to this site!, Somehow I think it is the KSP44. Normally under the first code on the transistor there are some more numbers under, is the 013 them?
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tim
Mad Scientist

198 Posts

Posted - Jan 27 2007 :  4:13:00 PM  Show Profile  Reply with Quote
yes the transistor says ksp44 then under is a - 013
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tim
Mad Scientist

198 Posts

Posted - Jan 27 2007 :  4:14:46 PM  Show Profile  Reply with Quote
all i can find is ksp44 , but the 013 means something because there is also another transistor ksp44-012 as well so the bottom numbers mean something.
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tim
Mad Scientist

198 Posts

Posted - Jan 27 2007 :  4:16:25 PM  Show Profile  Reply with Quote
it comes up with this site because im probably the only one out there thats looking for this transistor and thats the only thing that comes up in the search.
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Binary 1011001101
Nobel Prize Winner

United Kingdom
569 Posts

Posted - Jan 27 2007 :  5:32:57 PM  Show Profile  Reply with Quote
Normally I leave out the number at the bottom, here is a example: 7805C regulator, brings up lots of datasheets, but it has a number at the bottom that says 9537 if I type that into google plus the 7805C I get nothing.
If I was you just leave out the bottom number.
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tim
Mad Scientist

198 Posts

Posted - Jan 28 2007 :  12:37:53 AM  Show Profile  Reply with Quote
ok i looked it up without the bottom numbers ill have to see about that one. thanks.
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VOLTAGE
Apprentece

Ghana
5 Posts

Posted - Jan 30 2007 :  08:30:25 AM  Show Profile  Reply with Quote
How are the terminals of the 2N3055NPN transistor connected(ie.the base,collector and emitter)?
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Ghana
5 Posts

Posted - Jan 30 2007 :  09:06:47 AM  Show Profile  Reply with Quote
Are there substitutes for the HEP154 sillicon diode?
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Ghana
5 Posts

Posted - Jan 30 2007 :  09:08:20 AM  Show Profile  Reply with Quote
How do you determine the polarity of the capacitors?
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VOLTAGE
Apprentece

Ghana
5 Posts

Posted - Jan 30 2007 :  09:10:42 AM  Show Profile  Reply with Quote
Can R3,R4 be relaced by a 180-ohm,1-watt resistor?
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