[time-nuts] Odd-order multiplication of CMOS-output OCXO

Bob kb8tq kb8tq at n1k.org
Mon Jan 20 19:44:01 UTC 2020


Hi

> On Jan 20, 2020, at 2:38 PM, jimlux <jimlux at earthlink.net> wrote:
> 
> On 1/20/20 10:01 AM, Mark Haun wrote:
> 
>> A fair question... in fact I was initially planning to use the ABLNO +
>> a PLL.  The OCXOs I found, however, are CTS VFOV405's with phase noise
>> claimed to be just as good as the ABLNO or CVHD VCXOs:
>> https://www.ctscorp.com/wp-content/uploads/VFOV405.pdf
>> They are reasonably low power, small[-ish], and have adequate stability
>> for my needs.  You can see why it is tempting to make the multiplier
>> scheme work, as it should save on both power and board area. (The
>> target application is a battery-powered SDR.)  So far there don't seem
>> to be any show-stopper issues with the plan, except that I am going to
>> have to put together a phase-noise measurement system, or find a friend
>> with one.
> 
> Have you checked delivery times? - Just because it's listed in the catalog does not mean you can get it in the next few weeks or months. If the online sources (Digikey, mouser, Newark, etc.) have them in stock, then you're good to go, but otherwise you could be looking at 6 months or more.

…. and maybe nasty stuff like minimum order quantities in the range of 10 or 20 pieces ( or prices below that which work out to the same thing). 

Bob

> 
> 
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