I have more information than anyone EVER wanted about this. It's compicated and not straightforward, so strap in.
misterfade wrote:I can't seem to find "rd14k12d" anywhere.
So, Akai sort of took the Alps (now Alps Alpine) part number and mixed it up to make the Akai part number.
The Alps RK14K is a series of potentiometers, and the Akai service manual gives us clues to which individual ones they are.
rec: vr rotary RD14K12D L20 C203x2
"RD14K12" is the series,
"D" indicates a vertical pot for volume
"L20" corresponds neatly with 20mm, one of the available shaft lengths for an RK14K-series pot,
"C" indicates an exponential or "audio" resistance taper, decreasing clockwise,
"203" is the code for a 20kOhm resistor (20 followed by 3 zeros),
"x2" because it is a stereo pot.
main: vr rotary RD14K12D L20 3B103x2
"3B" indicates a linear resistance taper increasing clockwise with increased resolution at the low and high ends,
"103" indicates 10kOhm.
Assuming my decoding of Akai's gibberish part number is correct, current Alps part numbers for these (according to the attached data sheet this information comes from) are as follows:
Record level: RK14K12D0-F20-C0-C203
Main out & Q-link: RK14K12D0-F20-C0-V103
Now here's where it gets trickier: those are ordering codes when you're ordering parts direct from Alps by the thousands. In practice, there are part numbers for common configurations that they produce regular runs of.
For the main out and Q-link pots, that part number is...doesn't exist.
For the record level pot, that part number is...doesn't exist.
That unfortunately is all I have for the moment. I'm going to poke around and see if I can find anything that will suit, but basically Akai custom-ordered some pots from Alps and they don't make them anymore, unless you want to buy a thousand of them.