[time-nuts] Z3801 replacement

[Bob Camp]

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.)  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.
> 

The "Nortel" version is the one you want to get. It runs pretty well with LH. If it's from RDR, they are in good shape and the ones I've gotten from him have worked well. Since you are using a cleanup oscillator after the GPSDO, they should do just fine.

Bob


> Does anybody have experience with these?   I'm particularly interested in the best phase noise I can get.  This will be station master frequency reference, and will ultimately lock stations up to 10 GHz.
> 
> Thanks & 73,
> Jim
> wb4gcs at amsat.org
> 
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