Ed Palmer wrote: "The second board is 05061-6165. It includes frequency divider, amplifier, and level adjust circuitry to make it plug-compatible with the older oscillator. Here's a picture of that board. Notice the 4 SMB connectors and the four single lead connectors - just like the older oscillator. The 110 VAC heater on the old oscillator isn't needed with the 10811 so they didn't duplicate that." ++++++++++++++++++++
I don't have a newer HP 105 to compare and only have the schematic for the newer oscillator assembly that shows that it used the 10811 oscillator and a couple of circuit boards. It seems HP loved to make revisions. Here is another board similar to the one you just attached a link to. This one has the same connections as the one you have to connect to the older oscillator (this one was modified and in a piece of non-HP equipment)and although it appears at a glance to be functionally identical to your board, has a far different layout. The HP number on this board is 05061-6199 http://farm5.static.flickr.com/4126/5095072396_83f549bd25_b.jpg -Arthur _______________________________________________ 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.
