[time-nuts] Z3801 replacement

[Adrian]

How about using the 10811 from your broken Z3801A?

Adrian

Jim Sanford schrieb:
> Bob:
> Thanks.
> You correctly anticipated that I will use this to lock a 100 MHz 
> Oscillator, and either multiply or lock from there.  (I'm considering 
> a VCXO at 1GHz as well, it would either be locked to 100 MHz or 10 
> Mhz.  Haven't decided yet, also considering multiplying up to 1000 and 
> then from there to 2Ghz, 3Ghz, and 5. Haven't decided about 10 Ghz yet.
>
> Appreciate the info.  The units on ebay are cheaper than the VCXO I 
> was considering (first time I looked, they were more), so will 
> probably just do that.
>
> Thanks again,
> Jim
> wb4gcs at amsat.org
>
> On 6/28/2013 10:07 AM, Bob Camp wrote:
>> Hi
>>
>>
>> On Jun 28, 2013, at 9:45 AM, Jim Sanford <wb4gcs at wb4gcs.org> wrote:
>>
>>> All:
>>>
>>> My Z3801 no longer works, and I've not been able to get any new 
>>> ideas on it, so am looking for a replacement.
>>>
>>> I've come across a nice 10 MHz that has very good phase noise 
>>> (-145db or so at 10 KHz offset), but costs $175 in single quantities 
>>> (digi-key, I think.)
>> The OCXO in the TBolt is about -165 at 10 KHz
>>
>>>   I was considering using one of W1GHz's boards to lock it to a 
>>> jupter GPS engine that I already have. Several people have told me 
>>> this is overkill, recommending the Thunderbolt.
>>>
>>> I've read that there are various OXCXs used in Thunderbolts, some 
>>> OK, some not so good.
>>>
>>> Looking on ebay right now, I see a Nortel Trimble NTBW50AA, a 
>>> Symmetricom, NTBW50AA, and another Nortel.
>>>
>>> Does anybody have experience with these?
>> Yes
>>
>>>    I'm particularly interested in the best phase noise I can get.
>> Spurs are what will kill you.
>>
>> Phase noise is about 10 db worse than the TBolt far removed. It's 
>> similar close in.
>>
>>>   This will be station master frequency reference, and will 
>>> ultimately lock stations up to 10 GHz.
>> Simple answer is to run a clean up oscillator at 100 MHz and then go 
>> from there. None of the GPSDO's have low enough spurs to really do an 
>> excellent jobs at 10 GHz.
>>
>>
>> Bob
>>> Thanks & 73,
>>> Jim
>>> wb4gcs at amsat.org
>>>
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