[Milsurplus] Mil HF rigs not NTIA compliant

[Bob Camp]

Hi

At least as I read the NTIA standards the issue of stability only comes 
in above 20 MHz. Below that a 1 ppm radio is perfectly acceptable since 
it will be inside the +/- 20 Hz specification.

A lot of the military portable gear is TCXO based. Over a reasonable 
military temperature range 1 ppm was a rational stability 
specification. The  mobile and base gear usually was specified at 
something better than 0.1 ppm.

Does the good old NTIA specify a temperature range? If they do I missed 
it on their site ...

	Enjoy!

		Bob Camp
		KB8TQ



On Sep 13, 2004, at 5:16 PM, Peter Gottlieb wrote:

> Does anybody know why most military rigs are spec'd at 1 PPM frequency 
> accuracy while NTIA compliance requires 0.66 PPM ?
>
> I would like to use mil surplus (and very rugged and reliable) 
> equipment for CAP etc. but am prohibited due to this non-compliance.
>
> Side note:  I have yet to find a rig that wasn't significantly better 
> than that 1 PPM spec, but nevertheless, NTIA compliance is based on 
> radio specs, not performance.
>
> Peter
>
>
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