PT2399 bucket-brigade delay
http://www.synthrotek.com/products/modular-circuits/dly/
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PLEASE READ WHOLE DESCRIPTIONFrom the Synthrotek website:"DLY is a PT2399 bucket-brigade style delay Eurorack module. The PT2399 IC delivers lush analog-sounding tones (the IC is partially digital).When the Mix knob is fully counter-clockwise, you get a dry signal. When it is fully clockwise, you get a fully wet signal. This allows the user to incorporate this module into effects sends, etc. Also, the DLY allows for CV over Feedback and has an internal Feedback amount trimpot for precise adjustment.Another added feature is the delay Rate range internal trimpot, which allows you to dial in the delay range of your choice. Adjust the trimmer and main Rate knob to dial in clean short slap-backs all the way to the extreme, chaotic sounds of an over-clocked PT2399 chip."Selling both as a set. Both were built from a kit--for some reason the pots that came with one of the kits had extra long shafts.Now...Both modules were tested and the module with the lighter knobs works as designed. The module with the darker knobs does not. It powers on.Sound passes through the module (you get the input sound at the output).When the Rate knob is cranked all the way up, you can hear the PT2399 doing something.Feedback knob does nothing.Mix knob seems to be working as expected.I've swapped out all the ICs and adjusted the trimpots, to eliminate all the easy fixes. It did work at one time, and the circuit is not terribly complex, so it can very likely be fixed. I just didn't use it often enough to warrant the effort to hunt down the issue and fix it. Maybe you can.
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