[time-nuts] 5 MHz Frequency Doubler

Christopher Hoover ch at murgatroid.com
Thu Oct 26 02:13:55 EDT 2006

Hey 'nuts,
I'm looking for a good design for a 5 MHz frequency doubler.
The Wenzel Blue Tops HF doubler is said to be  based on a low phase
noise, public-domain NIST design:

The LNHD is a fixed-frequency HF doubler based on a public-domain design
developed by the National Institute of Standards and Technology (NIST
<http://www.boulder.nist.gov/timefreq/> ) for superlative phase noise

Can anyone point me at a this design?  I haven't had any luck finding it
on the web.
I'm open to suggestions on other doubler designs, as well.  

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