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Post by jayson on Oct 29, 2014 20:37:30 GMT -6
I've been using a Ghost as the board in my home studio for a long time. I had the CAL update done on it in bits and pieces and it seems I've taken it apart and put it back together again a thousand times but I never get tired of doing it. Their cheap, they sound pretty good, they function pretty intuitively and - most importantly -you can modify them like crazy without feeling like your drawing a mustache on the Mona Lisa. Then they sound really good! I'm sure there's gotta be some pretty creative mods folks have made with them over the years; let's hear about 'em. I'll start by asking a question; does anybody know the pinout for the CR pot (VR5) on the SC3628B board? I'm hoping to install an ELMA rotary switch instead of that cheezy variable resistor at VR5. I've been trying to figure it out from the schematics I have on pdf, but there's a large clump of text in the exact spot of VR5 and the information gets pretty garbled.
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Post by svart on Oct 31, 2014 11:01:25 GMT -6
I don't have a Ghost, but if you post the schematics, I'll help you figure out what you want to know.
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Post by jayson on Oct 31, 2014 11:22:54 GMT -6
Thanks svart! I downloaded the schematic from a link on gearslutz: www.gearslutz.com/board/attachments/geekslutz-forum/310638d1348597202-soundcraft-ghost-schematics-ghost.pdfThe module in question is on page 12. I guess that I could also just use a multi-tester on the existing pot and see which pin pairs result in a change in resistance when I turn the pot. Hadn't occurred to me before...duh! Been thinking about adding some of Jeff Steiger's ACA modules somewhere in the master section but I haven't quite figured out where on that board I would intercept the signal to feed the ACA and at what point I would jump the output of the ACA back into CRM board.
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Post by svart on Oct 31, 2014 11:41:37 GMT -6
Looking at it, it seems the lettering L14102 could be a Soundcraft part number.
VR5A/B is a dual gang pot, possibly 1K-100K in value. Unknown taper, but likely log/audio.
I'd remove the pot then take your meter and measure between pins 1 and 3 for your total value. (you can't reliably measure pots in some circuits. Best to remove and measure.)
Now turn the pot 1/4, measure between pins 1 and 2. Then turn to 1/2 and measure, and finally 3/4 and measure. that should give you some approximation of what the taper is.
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