If you place both probes on the same speaker terminal, do you get a perfectly clean trace that is precisely on the reference line?
If you connect a dummy load to the amp, does the current draw increase?
I pulled the inductors, will check them on the lcr meter at work.
If I connect a load the amp will pull 30 amps immediately upon a signal being applied.
Something is wrong. In differential mode, if you place the probes on the same point, the trace should not be deflected (should remain a straight line at the reference). It could be that the probes aren't matched well enough. Try placing them on a 12v DC source to see if they work properly. It could be a high-frequency response issue with one of the probes.
Did you find a problem with the inductors?
What was their inductance?
Does it still draw excessive current when you connect a load to it with no input signal?
The inductors measured 20uH I believe, don't think it was 20mH.
If I load the output with 4 ohms the clip circuit is tripped. Then I get no output.
Sent from my DROID BIONIC
Are you sure that your supply is capable of powering this amp?
30amp supply, doesn't dip while it powers up.
Maybe the clip circuit trips when it powers up initially. It has a self test on power. I'll monitor the voltage.
Sent from my DROID BIONIC
These and Stetsom amps are essentially the same. The Stetsom amps that I've had in the shop were all very noisy. These were the older models but I don't think that there were many improvements. If it's operating at the right frequency (likely is because it's determined by a crystal oscillator) and the output filter components are OK, I'd think that it's normal.
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