[time-nuts] Vectron Type 229 Crystal Oscillator
GandalfG8 at aol.com
GandalfG8 at aol.com
Mon Jun 25 16:44:34 UTC 2012
I agree totally, but if you could see the current state of my test area
you'd understand why I just wanted to run a few hours quick test to make sure
it was ok and then get it out of the way for now:-)
regards
Nigel
GM8PZR
In a message dated 25/06/2012 17:39:53 GMT Daylight Time, lists at rtty.us
writes:
Hi
Letting it sit on the power supply should not damage to an OCXO (this one
or
any other). Having it "baked in" when you need it is a lot easier than
waiting two weeks once you have the need :)...
Some will stabilize to X.XXX pp(what ever) in fewer days than others. They
all get better if you leave them on power.
Bob
-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of GandalfG8 at aol.com
Sent: Monday, June 25, 2012 12:32 PM
To: time-nuts at febo.com
Subject: Re: [time-nuts] Vectron Type 229 Crystal Oscillator
Hi Bob
Initially I just wanted to confirm all was working, oscillator, oven, and
EFC, and have put it to one side for now, but I agree it should run for
at
least a couple of weeks to settle down once it's powered more permanently.
I've got a plot I made of another nice Vectron oscillator, a 10MHz
CO_206B59V, after it had been in storage for a couple of years and it took
around
10 days before that was anywhere near asymptotic to a stable value, and
this is supposed to have been unpowered for several years more than that
one!
regards
Nigel
GM8PZR
In a message dated 25/06/2012 17:11:10 GMT Daylight Time, lists at rtty.us
writes:
Hi
Probably best to let it run for a couple weeks before doing anything
really
serious with it.
Bob
-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of GandalfG8 at aol.com
Sent: Monday, June 25, 2012 8:23 AM
To: time-nuts at febo.com
Subject: Re: [time-nuts] Vectron Type 229 Crystal Oscillator
Oh My God......IT'S ALIVE !!! :-)
-----------------
In a message dated 25/06/2012 01:14:25 GMT Daylight Time,
GandalfG8 at aol.com
writes:
Hi All
I'd like to say thanks again to all who've offered advice and
information
on this one, either via the list or directly, and having now been
provided
with the all the information I need would like to share it just in case
it's useful to anyone else.
The connection data for the Vectron 229-9268 is indeed as follows.....
1 B+ (Oven)
2 N/C
3 N/C
4 B+ (Osc)
5 VCXO Supply
6 VCXO Input
7 Return (Case)
The supply to both pin 1 and pin 4 is +24V with a combined 250 mA
maximum
current at turn-on.
The unit has +7dBm minimum output.
EFC is 12 ppm p-p minimum for 0-6V on pin 6
Reference voltage on pin 5 should be ~6V
Given that it's after 0100 here, I think I might just quit for now and
put
it on test in the morning:-)
Regards
Nigel
GM8PZR
In a message dated 23/06/2012 19:20:57 GMT Daylight Time,
GandalfG8 at aol.com
writes:
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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