[time-nuts] Vectron Labs OCXOs Pin-out
sar10538 at gmail.com
Tue Mar 3 17:57:25 UTC 2009
Many thanks for your help with this. It looks like some types of these
use 15V and others 24V. I received a PM from Bob Raker with the
Both are 7 dBm output & 1 ppb/day aging
225-7639: +24V supply - EFC: .3 ppm min for 0-6V, +/- 1 ppb for 15 to 35C
217-8364: +15V supply - NO EFC, +/- 30 ppb for -20 to 70C.
In case anyone else was interested in this information.
2009/3/3 <Brucekareen at aol.com>:
> In my experience Vectron has not been able/willing to provide info on
> earlier oscillators. I acquired a 229-7730-9, 100 MHz unit and with an ohmmeter
> decided the pin connections seemed to match the diagram shown for the current
> CO-706 series. The question then was whether the supply voltage should be 12,
> 15 or 24 volts. The unit oscillated with 15v, but plotting the warm-up
> drift, I found that even after hours of operation the unit did not completely
> warm-up. The can was barely warm to the touch. I then tried 24v and the
> oscillator warmed-up in 16 minutes from a cold start -- that is the direction of
> frequency drift reversed in 16 minutes. The can was much warmer and reached
> that temperature much faster. Applying a 0 to +6 v control voltage to pin 6, I
> was able to shift the frequency about +/- 50 Hz. The mechanical tuning
> adjustment, at the top of the housing, allowed shifting the frequency over a much
> wider range. Initial current at 24v was 200 ma. This decreased to 105 ma
> after about 30 mins. Output power at 24v was +7.6 dBm. At 15v input, output
> power was a steep function of input voltage.
> Bruce Hunter
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Steve Rooke - ZL3TUV & G8KVD & JAKDTTNW
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