OK, I tried the AD8055A op-amp in the buffer. Output now looks exactly like the output of the OCXO (square wave). Unloaded output is 3.2Vpp. Output into 50 ohms is +10dBm, nice and clean. So, if you buy one and want to add the components to get 10MHz sq-wave output, you need to add a TBA 1-1219 isolated DC/DC converter, and an AD8055A op-amp. Works great. Mouser has them in stock. While I do have hot-air SMD-rework capability, the SOIC-8 package was easy to hand-solder with a small tip on my Hakko solder station so I didn't have to go get solder paste.
BTW, the price quoted for a unit WITH 10MHz output was $350, substantially more than the $201 for the non-10MHz unit. For $10 in parts I am happy. OK, it isn't sine-wave output. I don't have anything that requires a sine wave reference. So this meets my needs for NTP stratum-1 for the machines in my house, and 10MHz for my radios. Still, I wish to graduate to full time-nuttery status. I would like to do the ADEV analysis. Other references I have kicking around: Thunderbolt, Leo Bodenar GPSDO, Ephratom LPRO-101 Rb. Unfortunately I don't have a good, free-running OCXO for short-term comparison. Still, I suspect the Rb should work well enough for that. Also, the only device I have to DO the comparison is a Fluke T7260a. Thinking about a TICC. Advice? Brian, WB5BL --  <https://www.lloyd.aero> Brian Lloyd 706 Flightline Spring Branch, TX 78070 br...@lloyd.aero <mailto://br...@lloyd.aero> +1.210.802.8359 _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.