[time-nuts] hp5065b !!!
bobdarby at triad.rr.com
Wed May 1 13:46:15 EDT 2013
Thanks for the link. The manual I had was simply missing all details
related to the A3 module but this is superb. And yes, it would be nice
to see the later version.
I'm sure most everyone would like to have the level of performance
demonstrated by the Corby modified 5065's. As Magnus has stated there
is probably great interest on the list but many of us can't contribute
in any meaningful way. Keep us posted.
My question re the A3 module is related to the fact that an upgrade
there appears to be necessary to take advantage of Corby's mod. I don't
know the numbers of early versus late A3 modules but upgrades there may
be necessary for many (or most?) owners to take advantage of his work.
Also, is a change to the later A3 module a standalone improvement or
were there systematic upgrades throughout the entire system to go with
the newer A3 module? Is it practical to reverse engineer the later modules?
On 5/1/2013 8:41 AM, Adrian wrote:
> all of the manual donloads appear to be the Nov. 1979 version only.
> The A3 board is on pages 8-22 ff.
> There is a high resolution 3 vol version scanned by Brian Kirby KD4FN
> standing out
> Anyone has a later manual version? I would much appreciate to get the
> late A3 version pages.
> I have to say that Corby's modification in its simplicity and achieved
> improvement is absolutely ingenious.
> Robert Darby schrieb:
>> I have a question for the list that I'm sure Corby can address but
>> perhaps someone else can explain as well.
>> Corby notes that this mod has only been effective with late series A3
>> modules. My question is: what change did HP make to the A3 module
>> (early to late) that affects the mod Corby is making? I do not own a
>> 5065 and the the only manual I have found on the web omits the pages
>> related to the A3 multiplier so I'm not sure of it's exact function:
>> I assume it generates the phase modulated 6.8 GHz?
>> Bob Darby
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