[R-390] 390 non A calibrator is not 200 kc

[Bob Camp]

Hi

Locking up a multi vibrator over a decade frequency ratio is quite a 
bit more tricky than over an octave. I suspect that's one of the 
reasons why they went to 200 KHz in the later radios.

	Take Care!

		Bob Camp
		KB8TQ


On Jul 8, 2004, at 9:22 PM, Tom Norris wrote:

> Far be it from me to start a fight or anything, but...
>
> In my previous post, I said the 390 non A uses a 1 mc crystal
> I'm sitting here looking at the manual, and I quote -
> "Calibration oscillator V901A, a Pierce Crystal oscillator
> supplies a 1 mc signal for synchronizing multivibrator V902"
> Not 100 kc, not 200 kc, but 1 mc. I've got two versions of the
> manual here. Both say the same thing. Latest is TM 11-5820-357-35
> dated 9 March 1962. The other is the "Air Force" printing
> which is the same manual same date. Also have the Navy Manual.
> Also says the Y2K CD.
>
> The 390A does indeed have a 200 kc crystal oscillator in
> the cal circuit. So does the 392. Got both those radios
> right in front of me. Only have the manual for the 390
> NON A right now. Mind you the manual and schematics may
> be wrong....
>
>
> Tom
>
> Out of Lutefisk, so gotta stir up something.
>
> [Heck, I thought I was one of the old guys, now all I did was change
> my call from KA4RKT and no one recognizes me anymore... heehee]
>
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