[time-nuts] HP105B

[VE7HR]

Thank you Charles,
That will be a great help.  
I shall wait for them to surface.  
Looking on K0KBB there might be another addendum that is posted but no schematics. 
It appears my unit has an 10811 in it.  
Has anyone modified the HP105x to bring out the 10MHz to the outside? 
Seems it might have utility.  
If I recall the older units bring 5 MHz almost straight out to the connector.  And divide down for the rest. 
I am guessing I am not the first person to think this is a interesting idea.  
Any downsides to doing this. 

Thanks
Dave
VE7HR 

Sent from my iPhone

> On Nov 3, 2020, at 8:59 PM, Charles Steinmetz <csteinmetz at yandex.com> wrote:
> 
> Julian wrote:
> 
>> I also have one  *  *  * , if anyone has a manual.
> 
> As far as I know, HP never published a manual exclusively for these later 105s.  But there is a 39-page addendum to the 105A/B manual, dated April 5, 1989, which contains what you need.
> 
> I just uploaded the addendum to Didier's site (ko4bb.com).  I uploaded two files -- one contains the complete addendum, the other contains the schematics only (2, 11x17" sheets).  The file names are:
> 
> HP_105A_B_manual_addendum_later_units_with_10811_OCXO_1989.pdf
> 
>     and
> 
> HP_105A_B_schematics_later_units_with_10811_OCXO_1989.pdf
> 
> Once Didier moves these files out of the "holding pen" into the "general population" (likely days to weeks), you will be able to search for and download them.
> 
> Best regards,
> 
> Charles
> 
> 
> 
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