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I don't have the audio tone problem, so can't say for sure it is due to the 16mhz resonator.
However, when I put my finger on my 16mhz resonator, it's more than happy to move.
So there might be an easy solution here, perhaps solder a cap or two from resonator to ground,
though the pins are awfully small for most folks in the forum.
An easier solution might be to cover the resonator with insulating tape, then cover that
with some grounded copper tape.? About the same as putting a finger on it.
I'll experiment with that here.?

And while we're at it, that unshielded USB interface does not belong in a radio with a 12mhz IF
if it is ever going to be active while the radio is operating.

Long term, put a $2 processor chip down on some new Raduno
and feed it a different processor clock rate.
Or move to a different filter frequency on v5, and put a #define for it at the top of the source code.




##############? Continue reading at your own risk!!!? #################

Way off topic, we may need to create a new group for this one.? But oh well:

Don't do a Bill Gates and wallow in mistakes made decades previous.

You may make billions, but Bill (and that IBM PC crew) were responsible for an entire generation
of programmers making a career of cooking their shoes.? Just google for "segmented memory advantages".
Here's an especially good one, posted recently, aimed at CS students:
? ?

Those "advantages" were laughable in 1980 when Intel came around to us flogging their new 8086 against
Motorola's 68000 with its flat?4 gigabyte address space.? ?A 40 year old list of bullet items
that students today are still trying to make sense of.?
Try to avoid doing that sort of thing to ham radio.? ?;-)

"Cooking their shoes" is a reference to this old chestnut of a unix fortune cookie:
?
Of course, that was a reference to the IBM 360 crowd, not the IBM PC,
which did not yet exist when that was written.? But applies nonetheless.

And I won't mention Bill's snuffing out of any competition through any means available,
including that SCO vs linux crap.?

Though I must admit, Bill is trying to do good things with his money these days.

Now you got me going.
Don't worry, I'll go have a beer and try to calm down.

Jerry, KE7ER