Finally 100% it's alive.
de W7CPA ar
The Japanese FP-301D manual is correct.
It's just a bear to markup the sheet with a pencil and then create the ordered 2 byte list for a PROM Programmer.
I did this for grins and probably will never use it.
The 10 minute timer only works if PTT is enabled for 10 minutes straight with no interruptions.
Interesting olde 1970s digital design.
Cheers all,