Moin Wolfgang,

Just back from a fun-field-day at M30.

You wrote:

...
Single-edge triggered flipflops for that counter (400 kHz in, 100 kHz
out)... doesn't matter where the "other" edge is.

Fine, that was my hope. Thanks!

Out of curiosity : You aren't building a Loran-synchronized 10 MHz
reference by chance ?
...

That's not the first goal, but may be an option later.
I'm thinking about extending the frequency ranges of the
monitors running here up to 196 kHz. These OCXOs are
looking quite stable (df/f = 10e-10/day).

BTW: read on Spiegel-Online that the Mars explorer
"Curiosity" has special profiles on its wheels -
leaving imprints in the soil in Morse code: "JPL".
Need new tires, at car, next winter...

73 de df3lp,
Peter