[time-nuts] Fleamarket find

Ed Palmer ed_palmer at sasktel.net
Tue Oct 19 00:27:43 UTC 2010

As you say, another revision.  Searching on 05061-6199 refers back to 
this list.  The 6199 board was apparently another one that showed up in 
the 5061B.  As you guessed, it has the same functionality as the 6165 board.


Arthur Dent wrote:
> 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

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