LF: EbNaut / Coherent PSK reception with SDR (-IQ) or similar radios

[Wolfgang Büscher <dl4yhf@freenet.de>]

Greetings all,

After trying a couple of modifications to my SDR-IQ, I found the 
following site ..
http://g4hup.com/SDRlock.html

.. which describes how to lock the 66.6667 MHz 'ADC clock' in the SDR-IQ 
to an external 10 MHz reference.
Does anyone here have own experiences with this, or a similar circuit ?
Dividing the 10 MHz reference by three, and subtracting that from 10 MHz 
multiplied by 7 sounds intriguing, but a multi-pole crystal ladder 
filter to 'clean up' the resulting 66.6666666 MHz signal is easier said 
than done (..lacking such crystals in the junk box).
73,
  Wolf DL4YHF .