[time-nuts] eBay Giveaway Vectron OCXOs

Peter Gottlieb nerd at verizon.net
Fri Dec 23 14:57:03 EST 2011


A search of the Vectron site for OCO500 (which is on my unit) brings up 
a datasheet which references that as a "replaced" unit.

http://www.vectron.com/products/ocxo/c4550.pdf

Shows there are 5, 12 and 3.3 volt options.  I don't see where 4.8 volts 
is a reference output voltage, the closest is 5 volts with the 12 volt 
unit.  I would put the unit on a variable bench supply and slowly raise 
the input voltage to see where the reference stops increasing but I 
would hazard a guess that it is a 12 volt unit.  If you increase the 
supply to 5.5 etc then in that case you would see the reference stop 
increasing at 5.0.

Peter



On 12/23/2011 2:42 PM, Magnus Danielson wrote:
> On 12/23/2011 08:26 PM, SAIDJACK at aol.com wrote:
>> Running it at 5V with a Ref out at 4.8V would seem too close. Maybe 
>> it's a
>> 12V part?
>>
>> If nothing else this could be a very stable, ovenized 4.8V lab  
>> reference
>> source..
>>
>> Is anyone planning to monitor the aging/stability/noise of this  
>> reference?
>
> My guess would be for 12 V, but 5V would be one to try.
>
> Measuring the frequency stability on 5V would be one thing to try.
>
> Cheers,
> Magnus
>
>> bye,
>> Said
>>
>>
>> In a message dated 12/23/2011 07:28:34 Pacific Standard Time,
>> danrae at verizon.net writes:
>>
>> Thanks  for all the responses.  A quick check before breakfast shows 
>> that
>> mine would seem to be for 5 Volts since the power consumption at that
>> input agrees with the data sheet referenced; the current peaks at 0.95 A
>> warming up and 0.13 A warm.   Reference V out is 4.8  V.
>>
>> Dan
>>
>>
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