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Old 8th February 2013, 06:46 PM   #601
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Thanks. Those are LEDs. Nice part, a little pricey:

Q14F1BXXB24E Apem | Mouser

I live outside Boston - major snow storm today. Working from home, listening to music for the last 8-9 hours. Sounds awesome.
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Old 6th March 2013, 04:58 PM   #602
KWS1 is offline KWS1  United States
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Default F5 R11 & R12

I am seeing 20 volts at R11 & R12....What is wrong? No smoke....
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Old 6th March 2013, 05:20 PM   #603
Marra is offline Marra  United Kingdom
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Is that at or across the resistor? Are the trimmers set to zero?
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Old 6th March 2013, 05:37 PM   #604
KWS1 is offline KWS1  United States
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One probe..gnd the other at the resistor.
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Old 6th March 2013, 05:38 PM   #605
6L6 is offline 6L6  United States
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Do you have the pots turned all the way down? Are you sure which way they turn? You might have one all the way up...

Also, Check all your solder connections. Especially around the P channel output Fet
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Old 6th March 2013, 05:42 PM   #606
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I am unable to get behind the pot to zero .... I think clockwise increase.. I will check the solder connections... Thanks
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Old 6th March 2013, 05:50 PM   #607
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Clockwise or counter-clock increaseis a function of how the PCB attached to the pot, so it's not necessarily logical.

Twist for minimum resistance across R5 and R6
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Old 6th March 2013, 05:56 PM   #608
Marra is offline Marra  United Kingdom
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I would recommend connecting your Dmm across R5[2k2] powered down of course and turn the trimmers which ever way gets you to zero.You might only get down to about 3/4 ohms which is as far down as mine went.
6L6 beat me to it.
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Old 6th March 2013, 07:19 PM   #609
KWS1 is offline KWS1  United States
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There is no change ......both trimmers have no effect. I checked the solder connections....everything looks ok
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Old 6th March 2013, 07:21 PM   #610
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Do you have your DMM set to ohms ?
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