> Why would you do this? The reason for H&P was to stablize VFOs
> to get near crystal stability. Crystal oscillators are very stable
> and any drift is usually directly related to thermal effects on the
> crystal itself. The thermal effects are easily controllable with
the
> oldest and best but power hungry being an oven at 50-70C. Second
to
> that is TCXO applying temerature compensation via resistance
> thermometer and applying a correction to a varicap based on some
> predetermined curve.
>
> However if you want the ultimate in stability the usual path then
is
> GPS referenced when the Crystal osc is tuned over a rance on usualy
> less than 100cycles in a PLL system referenced to the very accurate
> GPS time clock. This is usually used when you want 10-8 or better
> stability and accuracy.
>
> Allison
GM Allison. I think the question was as to using a Rhubidium
standard to discipline a lower accuracy crystal to Rhubidium
standards by slaving it with a Huff n Puff in lieu of a PLL. By the
nature of the Huff n Puff, where the controlled oscillator is never
on frequency (except when passing thru) but always trimmed in the
direction of being on frequency, I too suspect he would be better
served to use a PLL instead. However, in the interest of the
experiment I would like to know the result, (increased jitter in
lieu of increased phase noise?) particularly when using the G7IXH
stabilizer instead of Klaas's circuit. I have one of those built and
functional. (Functional only after Pete steered me to a solder
bridge on my board that was making me unidirectional!) Now all I
need is the Rhubidium standard.
Regards
W4ZCB
>