[time-nuts] Vectron Type 229 Crystal Oscillator

Mon Jun 25 16:40:46 UTC 2012

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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