[time-nuts] Regarding the 00105-60xx (Bringing a 5065A back to life)

Bob kb8tq kb8tq at n1k.org
Sun May 14 19:44:29 EDT 2017


If you do decide to go with the 105 OCXO’s in your 5065A, you probably will need to test the samples you
have on hand. The selection process that sorted them into groups took place before many Time Nuts were
born. Over that sort of time period, stuff drifts and (possibly) gets better.  Even when they were brand new,
there was no guarantee that a “plain spec” unit would actually be worse that a special spec unit. 


> On May 14, 2017, at 12:43 PM, Ulf Kylenfall via time-nuts <time-nuts at febo.com> wrote:
>   What I wanted to know was the differences (specs) betweensome of the 00105 oscillator modules in order tomount the best one in the 5065A which I am trying tobring back to life.
> I have a bunch of 10811assy:s and thereare differences in drift, phase noise, etc. Thecoarse frequency adjustment hole does not havethe same coordinates as the 00105 so I will not fitany of these.
> Fortunately I have an excellent printed copyof the 5065A manual with all schematics and so on.The manual is printed 1971.
> (I found some newer manuals where HP appearentlyhad made some modernisation of modules, replacingregenerative dividers with TTL versions, changedOP-amps into modern versions and so on, but the one at Keysight.com is not readable.)
> Otherwise, replacing obsolete components withmodern available ones would be another thing to do.
> Digging into the junk bin I found HP original 5065 extender boardsso that I will be able to check the PCB's once the workstarts.
> Ulf - SM6GXV
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