[time-nuts] Vectron Type 229 Crystal Oscillator

GandalfG8 at aol.com GandalfG8 at aol.com
Mon Jun 25 00:13:48 UTC 2012


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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