Pioneer PL-400X turntable

[ppppenguin]

If I was doing the mod seriously I might well dig out a CPLD prototyping board and use it to replace the PD1003. No problem with generating any frequencies I might want for this application. I'm sure something similar could be done with a PIC chip. For experiments I'd probably use an external oscillator. This is similar to the approach I took with 405 to 625 conversion experiments where I used an external oscillator in place of the decoder's xtal before synthesising the frequency I needed in the (already existing) FPGA.

The conlcusions I'm reaching, subject to possible future experiment:
* It's very likely to be possible to make the turntable run at 78 or variable speed.
* It shouldn't be too hard.

Thanks to Mark and all who have contributed to this thread.