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Old 26th December 2008, 10:49 PM   #11
AndrewT is offline AndrewT  Scotland
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plug in a bulb tester and start measuring what is going on!!!!
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Old 26th December 2008, 11:18 PM   #12
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Here is the pin out. It is different to HEXFET
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Old 26th December 2008, 11:26 PM   #13
rtill is offline rtill  United States
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so looking at that.... this is correct....
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Old 26th December 2008, 11:55 PM   #14
rtill is offline rtill  United States
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Quote:
Originally posted by Nico Ras
Here is the pin out. It is different to HEXFET
that is for the 2sk1058....isn't it? (diode points toward drain)
the 2sj162 would have the diode pointing to the source...right?
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Old 27th December 2008, 06:42 AM   #15
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Quote:
Originally posted by rtill


that is for the 2sk1058....isn't it? (diode points toward drain)
the 2sj162 would have the diode pointing to the source...right?

Yes that is correct. Sorry I should have pasted both. this is 2SJ162

Nico
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Old 29th December 2008, 01:08 AM   #16
rtill is offline rtill  United States
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ok...tested my transistors with a bulb tester, all test fine.
Put in a new transformer (30-0-30 3 amp Hammond))
Put in inline 3 amp fuses and they immediately blow when turning it on. What will cause this?
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Old 29th December 2008, 07:00 AM   #17
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Andrew,
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that's why I have to keep repeating that one should use a bulb tester for the start up of EVERY project and for the modification of EVERY project.
Maybe you`re gonna get the Big Bulb Award for that effort someday.
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Old 29th December 2008, 08:14 AM   #18
AndrewT is offline AndrewT  Scotland
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Quote:
Originally posted by rtill
ok...tested my transistors with a bulb tester, all test fine.
Put in a new transformer (30-0-30 3 amp Hammond))
Put in inline 3 amp fuses and they immediately blow when turning it on. What will cause this?

Quote:
Originally posted by Lumba Ogir
Andrew,

Maybe you`re gonna get the Big Bulb Award for that effort someday.
How does one blow a 3A fuse when using the bulb tester?
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Old 29th December 2008, 12:55 PM   #19
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Quote:
Originally posted by AndrewT




How does one blow a 3A fuse when using the bulb tester?

Could be 55W 12V car light bulbs.

rtll,

rather post your PCB layout or send it to me, it sounds as if you got something wrong.

This amp is very simple, and that could be the reason for making a mistake.

You may overlook your mistake because you have the net-list in your head and what you see is not necessarily what you think you see.
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Old 29th December 2008, 12:57 PM   #20
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I am curious, how did you test the transistors. Were the light on only when you biased the gate?
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