[GPS_Standard] Replacement 10 MHz Oscillators

[P M Gant]

I have spent the last week experimenting with replacement homebrew
oscillators for use in the GPS standard. After some work I now have a
fixed 10 MHz oscillator that drifts less than 3 Hz per hour after warm
up, this unit is single ovened but well insulated from the outside
world.

My next task is to turn this unit into a OCXO so I am looking for tips
about the recommended +/- frequency spread, control voltage and types
of varicap to use. All suggestions are welcome.

HA5RXZ