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

[Bruce Griffiths]

A conjugate regenerative divider with 2 parallel (16MHz & 10MHz) low Q 
bandpass filters should suffice.

Bruce

Peter Loron wrote:
> I can't speak for anybody else on the list, but if there was an 
> inexpensive converter to get a good stable 10MHz signal from one of 
> the cheap 26MHz OCXOs, I'd sure be interested in building/buying one.
>
> -Pete
>
> On 04/06/2011 06:23 PM, Greg Broburg wrote:
>> 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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