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Old 18th November 2010, 03:10 PM   #101
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Farnell have them .... 20 quid min charge if I buy through the website and 30 quid to use the phone order line ..... No thanks . Digikey has no minimum charge and 12 pound shipping .... I was going to wait and see if I need to replace anything else before I ordered.
Im off work waiting for a double hip replacement ... every penny counts

readings ...
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Old 18th November 2010, 03:23 PM   #102
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Hips, ouch.

I see the 62v, do you have 31 to ground at the amp boards?

I don't know what a quid is.

Last edited by Bill Fuss; 18th November 2010 at 03:26 PM.
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Old 18th November 2010, 03:34 PM   #103
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Right Channel


25 V + to Ground = 30.35

25 V - to Ground = 32.35

Left Channel

25 V + to ground = 32.26

25 V - to ground = 30.45

Rich
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Old 18th November 2010, 03:38 PM   #104
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OK, check to see if your offset is plus or minus so we can tell which half of the amps aren't working. It looks like it will be minus.
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Old 18th November 2010, 03:40 PM   #105
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Sorry Bill , I dont know how to do that
could you explain ?

R
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Old 18th November 2010, 03:42 PM   #106
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Just put your meter across the output terminals, black to black and red to red.
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Old 18th November 2010, 03:46 PM   #107
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0.814 r-r

1.002 b-b
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Old 18th November 2010, 03:52 PM   #108
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I think you misunderstood. We are looking for DC at the output of each amp where a spkr would be hooked up, that is the offset. The amp is supposed to be balanced so that there is only millivolts at the spkr hookup. If one set of fets is turned off, as you have, the offset will be very high.
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Old 18th November 2010, 04:00 PM   #109
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my meter reads .818 r-r v not mv

b -b is 1.001
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Old 18th November 2010, 04:06 PM   #110
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Default like this ?

I took the first measurement from the amp board out put
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