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Old 13th October 2006, 02:44 PM   #101
anatech is offline anatech  Canada
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Hi Mike,
I took it up to about 37 VDC, being realistic about the test. It's now hammering away. I'm running it just below clipping. Just looked, okay it's into clipping. Disco is fun for this stuff ("Knock on Wood" right now), the entire place is thumping.

I can say with certainty that the overload characteristics are pretty good. I'm impressed. So I'm going to let it cook. I must say it's hard to concentrate at the moment.

Mike, MORE POWER!!!!!!!!

Looks like I've gone to the dark side. -"Car Wash" is starting.

-Chris
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Old 13th October 2006, 02:51 PM   #102
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"I will survive" currently playing...
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Old 13th October 2006, 02:56 PM   #103
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"Boogie Wonderland"

I hereby name this the best disco amp ever!
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Old 13th October 2006, 03:05 PM   #104
anatech is offline anatech  Canada
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Hi Al,
You just dated yourself my friend! Good taste in music I might add.

Now it's on to "Chic", more good stuff coming too. Arrrrrrrr Billy, more power.

Now I've switched to the party animal that doesn't get out much. Izzz fun!

-Chris
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Old 13th October 2006, 03:07 PM   #105
MikeB is offline MikeB  Germany
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Quote:
Originally posted by pinkmouse
"I will survive" currently playing...
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Old 13th October 2006, 03:21 PM   #106
anatech is offline anatech  Canada
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Hi Mike,
2° C across the thermal pad to the heatsink. Heatsink is approx 40.4 °C. The heatsink is my standard test unit, 10" X 7" X 1". Both channels are mounted to it. I'm running it hard. Now, should I connect my dummy loads in parallel? I am looking at bias stability.

Now, if this performance can be at least maintained at a higher power level you will have a design to be really reckoned with. This one is already hitting the mark in this power class.

-Chris
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Old 13th October 2006, 03:33 PM   #107
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Cranked the bias a bit, now running at 22mA, as Chris recommended.

All together now...

"Ra Ra Rasputin, Russia's greatest love machine!"

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Old 13th October 2006, 03:34 PM   #108
MikeB is offline MikeB  Germany
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Chris, are your speakers 8ohm ? If yes, find more speakers...
It should have no problems with 4ohms, but i can't speak for the MJW devices. About bias, symasym appears to be slightly overcompensated.

Mike
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Old 13th October 2006, 03:37 PM   #109
MikeB is offline MikeB  Germany
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Quote:
Originally posted by pinkmouse
Cranked the bias a bit, now running at 22mA, as Chris recommended.
Hi Al, the 22ma were recommended from Chris for the MJx0281/0302, i doubt that it also fits for the "older" devices.

Mike
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Old 13th October 2006, 03:43 PM   #110
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Nope, I don't think it does, the treble has gone all edgy. Back to 55mA it is.

Time for some 70's rock I think.
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