Andrew;
I'm still in the "theory" stage of everything.
It appears that my measurements as far as amplitudes went were probably
completely off. They were done with a "x10" probe setting since this seemed
to affect the operation of the KLM-367 least. However the waveforms and
values looked very different from what I am getting now with a "x1" probe
setting.
Using two 33pF caps (as suggested by the 8048AH datasheet) did not work out
well (instant lockup). Neither did using a quartz oscillator with the stock
value caps (very unstable).
I also experienced more stable behaviour when doing measurements yesterday.
Right now I am using a 10pF ceramic cap for C23 (instead the 22pF cap) and
the synth has yet to crash. I'll let it run for a few hours.
One thing that was odd (or may reflect on my measuring abilities...) is
that the signal for XTAL1 and XTAL2 is reading not 6 MHz but around 10 to
12 MHz. One of the new boards reads even 18 MHz!
I'm still in the "theory" stage of everything.
It appears that my measurements as far as amplitudes went were probably
completely off. They were done with a "x10" probe setting since this seemed
to affect the operation of the KLM-367 least. However the waveforms and
values looked very different from what I am getting now with a "x1" probe
setting.
Using two 33pF caps (as suggested by the 8048AH datasheet) did not work out
well (instant lockup). Neither did using a quartz oscillator with the stock
value caps (very unstable).
I also experienced more stable behaviour when doing measurements yesterday.
Right now I am using a 10pF ceramic cap for C23 (instead the 22pF cap) and
the synth has yet to crash. I'll let it run for a few hours.
One thing that was odd (or may reflect on my measuring abilities...) is
that the signal for XTAL1 and XTAL2 is reading not 6 MHz but around 10 to
12 MHz. One of the new boards reads even 18 MHz!