> > > The results are decent but not stellar: > > http://www.anderswallin.net/2016/09/ettus-octoclock- > distribution-amplifier/ > > In particular the AM noise on the 10MHz looks high. Any > thoughts/comments? > > I am not surprised. They used a digital clock distribution chip. The chip > is not designed for lowest phase noise, neither is the surrounding > electronics. > And selling that whole thing, which is nothing more than the example > circuit > in the datasheet, for 1700 is a bit of a rip-off, IMHO. >
In fairness my link was to the version also containing a GPSDO. The price I see on the web for only the distribution amplifier is 960 eur. Timetech and/or Microsemi are probably better - at a higher cost. > IIRC your design beats theirs already in performance, doesn't it? > Yes, my prototype of the TADD-1 design with an AD8055 op-amp, powered from a +12VDC battery, and wrapped in alu-foil to shield, looked quite good: http://www.anderswallin.net/wp-content/uploads/2015/12/alufoil_and_battery.png The 6502 is better and I opened it up to find it has an LMH6702 input stage and LMH6609 output stages. I will try that at some point. Anders _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
