[time-nuts] Fleamarket find

Bob Bownes bownes at gmail.com
Tue Oct 19 01:47:53 UTC 2010

Fascinating discussion.

One of my 'fest finds long ago was a 10811 on a 05328-20027 board.
When I recently went and googled on that, I came up with a 5+year old
discussion from the archives of this very list.
http://www.febo.com/pipermail/time-nuts/2005-May/018382.html says that
the 05328-20027 goes in a 5328. Oddly enough, the 5328 I have has a
10811 plugged directly into the motherboard so the two must be at
least pin compatible. Any opinions on using the 10811 alone or should
I put the 05328-20027 in as well?


On Mon, Oct 18, 2010 at 8:27 PM, Ed Palmer <ed_palmer at sasktel.net> wrote:
> 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.
> Ed
> 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
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.

More information about the time-nuts mailing list