[time-nuts] Vectron Type 229 Crystal Oscillator
GandalfG8 at aol.com
GandalfG8 at aol.com
Sat Jun 23 20:13:12 UTC 2012
Hi Don
Thanks for the reply, the can itself is certainly soldered shut but whether
or not the base is intended to be fully sealed or just to provide
insulation around the pins I'm not sure, given that the can seal is probably
breached anyway by the nut fixed SMA socket.
I've been assuming the output is sinusoidal but that's really just a guess
as I have no information on either that or the specified power output.
I've also been searching to try and identify any items of Racal kit that
might have used a 100MHz oscillator but have drawn a blank so far, and not
too sure they would have used a Vectron oscillator anyway if it was a UK
manufactured product, so that might just have been a false alarm.
Regards
Nigel
GM8PZR
In a message dated 23/06/2012 20:54:28 GMT Daylight Time, djl at montana.com
writes:
Kovar is a glass seal, much like a tube base :-), so that's sorted. The
voltage is as you point out another problem. The presence of the Kovar
seal suggests that the unit is nicely sealed up, not to be opened. Do
you know what the waveform or power level should be on the output?
Don
GandalfG8 at aol.com
> I've recently bought a Vectron 229-9268 100MHz crystal oscillator via
> Ebay with no information other than it was supposed to have been
> removed from
> an item of Racal radio equipment several years ago.
>
> It has an SMA RF connector and a 7 pin circular power connector, much in
> the style of a B7G valve base, with several leads attached to that which
> terminate at what appears to be a miniature version of a 9 pin D
> connector.
>
> A search through the list archives, and online generally, has thrown up
> two different connection options offered in response to previous
> requests for
> information on 229-xxxx series oscillators, the first listed as being
> for a
> CO-229 is as follows.......
>
> Pin 1 No connection (NC)
> Pin2 Case(0V)
> Pin3 Case(0V)
> Pin4 B+ 24VDC
> Pin5 VCXO Supply For option V models only
> Pin6 VCXO Input For option V models only
> Pin7 VCXO Return/case For option V models only
>
> The second is shown as being for a "VECTRON 229 osc with 7 pin Kovar
> feed
> through in circle similar to a
> tube base".......
>
> 1 B+ (Oven)
> 2 N/C
> 3 N/C
> 4 B+ (Osc)
> 5 VCXO Supply
> 6 VCXO Input
> 7 return (Case)
>
> Mine looks to be a very close match to the second option, pins 2 and 3
> aren't used, 7 is definitely ground, and there are small decoupling caps
> from
> pins 1 and 6 to pin 7, although no decoupling on 4 and 5.
>
> I've seen suggestions for the single power feed versions that the
> supply
> options were either 12, 15, or 24 volts but have found nothing to
> indicate
> whether or not the dual power feed versions would always use identical
> supply voltages, or if they might also have been available requiring
> different
> voltages for oven and oscillator.
>
> I'm happy enough to play "suck it and see" with the oven voltage, and
> judge
> that by current and case temperature, but would prefer not to fry the
> oscillator as part of that process, bit self defeating really:-), so any
> information would be very much appreciated.
>
> regards
>
> Nigel
> GM8PZR
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--
"Neither the voice of authority nor the weight of reason and argument
are as significant as experiment, for thence comes quiet to the mind."
R. Bacon
"If you don't know what it is, don't poke it."
Ghost in the Shell
Dr. Don Latham AJ7LL
Six Mile Systems LLP
17850 Six Mile Road
POB 134
Huson, MT, 59846
VOX 406-626-4304
www.lightningforensics.com
www.sixmilesystems.com
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