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

wa1zms at att.net wa1zms at att.net
Wed Apr 6 22:03:44 UTC 2011


Hi Peter-
I just bought 3 of them for 222MHz ham transverter use like Joe has  
done.
Can't wait to get them. Thanks for listing them!


-Brian, WA1ZMS

On Apr 6, 2011, at 5:56 PM, Peter Loron <peterl at standingwave.org> 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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