Fw: K1 stability

[Mike Morrow-3]

>I know the specs say < 200 Hz / hour but I'm really hoping to see
>less than 100 Hz per month, kind of thing

Pardon me for asking, but is this a realizable goal (3 ppm/month at 28 MHz
over an unspecified temperature range) for the K1 frequency system which
consists of a crystal hetrodyne oscillator, crystal product
detector/transmit mixer oscillators, and LC VFO, none of which are
temperature controlled or compensated?  Would it be realizable for your K2?
Would it even be realizable for a FT-1000??

Even commercial DDS/PLL rigs don't come close without some sort of TXCO.

I guess I have my doubts.

73,
Mike / KK5F

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[Stephanie Maks]

On 30-Jan-06, at 11.38 .47, Mike Morrow wrote:
> Pardon me for asking, but is this a realizable goal (3 ppm/month at  
> 28 MHz
> over an unspecified temperature range) for the K1 frequency system  
> which
> consists of a crystal hetrodyne oscillator, crystal product
> detector/transmit mixer oscillators, and LC VFO, none of which are
> temperature controlled or compensated?

I don't know.  That's why I'm asking...  :-)

There are folks using converted CB radios, and folks using HTX-100's,  
that seem to stay on frequency all the time.  Granted, none of them  
are using an LC VFO, but they aren't rock-bound either.  I've been  
using converted crystal-based CB transmitters for 6 or 7 years and  
they've worked, but never looked or sounded as nice as the K1.

If it's an impossible goal for the K1, I'll accept that.

Thanks again and 73 de
Stephanie va3uxb
K2#5311 - K1#2132



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