[time-nuts] Fleamarket find

Arthur Dent golgarfrincham at yahoo.com
Mon Oct 18 23:16:18 UTC 2010


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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