[time-nuts] Looking to build 10 MHz tp 5 MHz regenerative frequency divider

[ed breya]

Been busy planning and rounding up parts and subsystems for my 
multi-function box for looking at phase noise and stability etc mostly 
on 10 and 5 MHz. The PN part will be kind of like Erik's recent project, 
using those identical MTI 10 MHz OCXOs (the subject of my recent info 
search) for initial experimenting. The baseband analyzer will be the 
HP3561A (0-100 kHz).

The other part will be a fairly simple analog DMTD system, with fixed 
100 Hz offset for 10 MHz, and 50 Hz for 5 MHz. I found I have a nice old 
10 MHz OCXO that has mechanical tuning only, that will be committed 
(built in) to this project. It's set now for 9.9999 MHz (10 MHz - 100 
Hz). I have no suitable 5 MHz OCXOs for this, so figured on dividing the 
9.9999 MHz by two when needed.

I recall many times over the years encountering talk about low noise 
regenerative dividers, but now that I'm actually contemplating making 
one, I can't seem to find much detail. I found a number of commercial 
ones like at Wenzel et al, but not much in the way of design detail. 
John M's ke5fx site has a good example for 80-40-20 MHz, but I can't 
seem to find any of the linked papers and such that were the basis. What 
I'm hoping is to find one or more examples of designs already figured 
out for 10 MHz/2. I think there must be some out there.

Does anyone know of such?

BTW I finally pulled the trigger on acquiring an HP8663A, which I've 
been wanting to get for a very long time. I've had a fully loaded (all 
bands) HP11729C for many years, to go with it, and finally be of use. In 
the TIM department, I have a busted HP5370A, and a good HP5372A.

Ed