[time-nuts] cheap 5V OCXO in 14DIP has about 1E-9 drift per day

Greg Broburg semiflex at comcast.net
Thu Apr 7 01:23:42 UTC 2011


Hi Pete;

I bought 10 of these from you already. Im working on
a converter that has 26M00 Hz in to 10M00 Hz out.
Not sure if that is of any interest but Im putting it on
the table.

Greg

On 4/6/2011 3:56 PM, Peter Loron wrote:
> Hello, folks. I'm the seller of the 26MHz OCXOs. Please reply off list 
> if you are interested in some. Thanks.
>
> -Pete
>
> On 04/06/2011 08:58 AM, Oz-in-DFW wrote:
>> Who is the seller?
>>
>> On 3/28/2011 1:40 PM, beale wrote:
>>> Just FYI, I'm not sure how this compares to other similar parts, but 
>>> I'm seeing about +/- 1 ppb (1E-9) frequency drift per 24 hour period 
>>> from one sample of the Pletronics OHM40480526, which I've had 
>>> running for about 10 days now. It runs on +5V and after a warmup 
>>> current of 250 mA for a few seconds, it draws about 60 mA steady 
>>> state at room temperature.  I'm driving the tuning voltage on pin 1 
>>> from a separate +5V reference to avoid variations due to heater 
>>> current shifts.  I use a simple resistive trimpot divider to set the 
>>> voltage, this is not a GPSDO (yet :-).
>>>
>>> I'm sure most on this list have more refined tastes in oscillators 
>>> than this one (and probably want 10 MHz instead of 26 MHz), but I 
>>> thought it noteworthy because it is so cheap. These parts are 
>>> currently available online for $2 each. I'm not affiliated with the 
>>> seller.
>>>
>>> a few more details:
>>> http://www.bealecorner.org/best/measure/time/Pletronics-26MHz-OCXO-tuning.pdf 
>>>
>>> http://www.bealecorner.org/best/measure/time/26MHz-osc-notes.txt
>>>
>
>
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