On Thursday, 21 March 2019 18:30:09 UTC, J.B. Wood wrote:
On 3/21/19 1:49 PM, Mike wrote:

Youa culpa because you posted a vague question and expected a precise/exact
answer.
How much accuracy do you need?
Call up a few vendors and ask if they can meet that spec over all your
environmental conditions and time.Â* Good luck with that.


People can't help solve your problem if you can't disclose it.
Feel free to continue to waste your (and other's) time.

Hello, and I see nothing "vague" about my OP. And I don't think I ever
implied I had a "problem" nor that I was attempting to construct the
subject appliance. I had a question about commercial design practice
and was seeking some info that I thought some folks on this ng might
know as a result of either repair experience and/or had seen circuit
schematics. Nothing else.

I can disappoint you then. My answer comes from understanding the principles behind the designs, which comes from years designing electronic stuff. I've never taken such a gen apart nor do I need to to understand why no-one in their right mind is going to derive the 50 or 60Hz from a crystal. Nor are they likely to clock a rock bottom price processor with a crystal.

Everyone has their point of view, and that's all good, but when you have not a clue and repeatedly criticise those that do, and then criticise peoples' fair criticisms of you... at least the rest of us can figure out where that goes.