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Pork Barrel V2

Started by TNblueshawk, September 10, 2013, 03:18:31 PM

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TNblueshawk

Howdy fellers. I've got an old PB board from 2010 I think it is. Version 2 anyway. Can't seem to get it to chorus. So here we go with what I have thus far. Ran out of time this morning before heading to work but I have some voltages at least.

First, bypass is good. Stomp on the FS and signal comes through fine. But, nothing I do with the knobs has any effect. I moved the trimmer ever so slowly and get no change in the signal. Now this old version has 3 SPST toggles. Two of the toggles do nothing when switched meaning the signal flows through just fine no matter which posistion the toggle is in. Curiously the Vibe toggle when switched cuts the signal off completely. Switch back and the signal is clear.

I doubled checked IC orientation, trannie orientation and diode orientation. I didn't have time to check all resistor/cap values this morning.

I also reflowed all joints (removing IC's of course). Checked under the mag glass for any bridges - none. Double checked my wiring and it looks good.

So on to the voltages: IC's purchased from Small Bear. All trannies are 5008's

IC1 4558

1 through 3: 3.48v
4: 0
5 through 7: 3.48v
8: 9.47v

IC2 TL062

1: Fluctuates 2.47-6.99v
2: 4.76v
3: Fluc's 3.6-5.75v
4:0
5 and 6: 4.75v
7: Fluc's 3.71-5.6v
8: 9.47v

IC3 MN3101

1: 9.36v
2: 4.79v
3: 0
4: 4.82v
5: .30v  ??
6: 8.2v
7: Fluc's 2.97-3.21v
8: .62v    ??

IC4: MN3007

1: 9.37v
2: 4.83v
3: 2.77v
4: .63v
5: 0
6: 4.79v
7: 9.41v
8: 9.41v

Trannies: All these read C,B,E in order

Q1: 2.52, 2.98, 9.46
Q2: 6.28, 3.32, 9.46
Q3: 2.69, 3.18, 9.46
Q4: 0, .40, 7.90-8.12 Fluc's
Q5: 3.15-4.46 Flucs, 3.65-4.95 Fluc's, 9.37

There are a few odd low value or what appears to be odd and low but I'm not sure.

Anyone have any thoughts? I am guessing that this PB is not one where the trimmer is so sensitive that there is that one tiny sweet spot that you have to hunt and find....I hope as I couldn't find it moving every so slowly on the trimmer.
John