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Old 16th February 2007, 09:05 PM   #21
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Jim, I would be very keen to see the full schematics when you get time to do them.

Are you going to bring it along to our diy meet in July?
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Old 16th February 2007, 10:40 PM   #22
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Al: I think the KAV-250 klone will be a huge success...
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Old 16th February 2007, 11:13 PM   #23
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I could certainly do with something that runs slightly cooler!
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Old 16th February 2007, 11:28 PM   #24
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Originally posted by pinkmouse
Are you going to bring it along to our diy meet in July?
If you diy meet is within 50 miles radius of Leedstown ! lol

I think I've got 2 good pairs of krell's I retested them all earlier (with a diode checker) but how to make sure?? I've got a few PNP's that I think are ok but only 2 NPN's.....
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Old 16th February 2007, 11:35 PM   #25
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Quote:
Originally posted by pinkmouse
I could certainly do with something that runs slightly cooler!

hmm...dunno about that it was getting quite toasty when I had it on test esp. the pre-driver transistors which arn't heatsinked. Also there are 2 x TO-220 packages on TINY heatsinks on the driver board I would of used bigger heatsinks e.g, like the ones on old comp motherboards or psus. No fans either, and the 10 x TO-3 cans on each channel are very closely spaced! I am musing to what originally caused the major fault I am trying to fix.....and whether it's likely to happen again!

Cheers have a good weekend I probably won't be on here till monday doing other things .....
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Old 17th February 2007, 12:02 AM   #26
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Sure would be nice if you could back engineer the driver board....

Thanks!

Mark
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Old 17th February 2007, 08:20 AM   #27
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Originally posted by Mark A. Gulbrandsen
Sure would be nice if you could back engineer the driver board....

Thanks!

Mark

I'll try....I've had a look at it and it isn't as complicated as I thought most of the component side tracks are a ground plane. Check back for updates next week I'll probably do the PSU first.

BTW, how did you manage to sign on here in 1970 !!!
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Old 17th February 2007, 08:28 AM   #28
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BTW, how did you manage to sign on here in 1970 !!!

Mark has powers*, the scale of which even mods can only speculate upon.



* Well, mostly a power bill we can't imagine due to his huge collection of Class A amps.
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Old 20th February 2007, 02:14 PM   #29
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Cool back after a mad weekend

Hi everyone I'm still here (just!) set up a huge PA over the weekend for a party, busy stripping it down yesterday but I'm back to real work today I'm going to draw out the rest of the circuits this week I'll keep you all informed!

Cheers, Jim
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Old 20th February 2007, 03:24 PM   #30
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May the Schwartz be with you Jim !
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