Okay, now I'm confused again. I see MXR9469 on an old Phase 90 pot, but MXR9479 in pics of D+ and Dyna Comps.
It's very confusing. I've spent many hours trying to resolve it and there's a couple of holes that still need plugging.
The very early Phase 45, Phase 90, and in fact Distortion+ used the MXR9469.
It later changed to MXR9479 I'm not sure of the exact year but it was around 1977.
AFAIK, the Micro Amp, Envelope Filter, Dynacomp, Noise gate, Phase 100 only used the MXR9479.
I don't know what the difference is between MXR9469 and MXR9479. I suspect the taper was changed (maybe the percentage of resistance at 12:00) since a lot of early Phase 90's are slower at the 12 O'Clock position. There's a small possibility the MXR9469 was 1M but I have my doubts.
If anyone can fill in this gap please post it!
There's actually quite a few variants of the Phase 90 (maybe two variants of the Phase 45). The PCBs actually have different version numbers. One Phase 90 variant has the colors of the wires swapped on the Speed pot.
The other one to be resolved is the "MXR 9470" which is the Blend on the Blue Box. I'm not convinced the value and taper have been resolved despite the values on web schematic and the original schematic. AFIK there's no "100-1013-xxx" pot version of the Blue Box since I think they stopped making it after 1980.
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Ah, another one. The era of Distortion + that used the MXR9469 for the Distortion pot used the "MXR9741" pot for the Level pot. So this make me think it *is* possible for 1MEG + 10k version of the Distortion+ to have existed. My other thought on this is the "MXR9741" was a stuffed up numbering of the "MXR9471" which is the 50kA pot used on later models.