Old Soul

Oh snap, plenty to come! Will this be a summer amp as well?



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Paid Member
Paid Member
2017-09-10 6:33 pm
popcorn, no glory ...
Twitchie, since you kissed me awake, here's what my old fingers came up with that good old Soul...

Just by looking at it it seems clear to me that I must improve the spacing—turn the Cap-Bank 90° (space is just snuggly ok), shorten bottom-plate and rewire the beast. (Ah, and I intend to insert a sort of handle to the psi, to be able to one-handedly lift it out of the chassis)

Since I must remove the boards to replace a faulty part, I will take the opportunity and turn the Beguns 180° (and add the forgotten heatshrink-tubes), so that the wires are parallel from board to beast... :Popworm:

@ZenMod: 🚙 :rofl:


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Paid Member
Paid Member
2017-09-10 6:33 pm
Just a word of caution:
the second-greenhornyest greenhorn or so!
Ok, so after what, 6 weeks, I got back in screw(-around)-mode, and dismantled my Old Soul to get the weaknesses and mistakes out.
Guess what: The cap-bank was still under load, causing a frightening zap-sparkle! Aah, I sometimes hate to be such a ... greenhorn.

Q 1: do the caps suffer when they're not getting drained for so long? (not speaking of shorting them, mind you)
Q2: Since they're off-board and not connected to anything anymore, how should I drain them?


Paid Member
2004-07-12 5:08 am
Haven't had much time to play lately but getting another look at Old Soul - I didn't order parts kit so I ordered my own parts. Does the grade for the optocoupler OK101 and OK102 (PC817C) make a difference? I notice now there are B, C and D grades/bins with different transfer ratio (Max) as well as forward DC current differences (10mA for B, 50mA for C&D). I checked my DK order and I have B&D grade parts, no C. On the channel I have working, it's fine at 1W but just past 2W, it starts to distort rapidly. Please note this is the working channel. I haven't checked the channel that doesn't bias yet.