Re: 10811A schematic - was( Re: [HP-Agilent-Keysight-equipment] 5061A advice sought)
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Hi Tam,
Yes it's available online. I don't know if Artek has better scans than what you find below. But I think these should be good enough.
Br, Askild
On Sat, Sep 12, 2020 at 10:03 AM Tam Hanna < tamhan@...> wrote: Hello,
now that my wife flies off to Germany for business, the good season
resumes at Tam H.Q.
My HP 53310A has the OXCO. Sadly, it blew up when I connected it to
230VAC for the first time, with the unit since always throwing a lesser
self test fail.
I bought the schematics from Artek, only to see that the OXCO unit is
not in there. Anyone have the schematics on hand, or know where to buy
them? I'll gladly pay Artek some extra cash - if only, because that
would confirm that he is still alive and should PLEASE PLEASE return my
Systron Donner manual
Tam
- - - - -
With best regards
Tam HANNA
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On 11.09.20 23:49, John Ackermann N8UR wrote:
> Is it the newer 10811A oscillator, or the older one (can't remember
> the number right now)?? They have different oven circuits.? But yes,
> it's been known to happen.? In particular, there's a thermal fuse that
> can give out.? Careful disassembly of the outer case will get you to it.
>
> John
> ----
>
> On 9/11/20 5:46 PM, Dave McGuire wrote:
>>
>> ?? Hmm, as in no longer heating?? That would make sense.? Is there a
>> common failure mode?
>>
>> ?? I'll de-rack it over the weekend.
>>
>> ??????????? -Dave
>>
>> On 9/11/20 5:44 PM, John Ackermann N8UR wrote:
>>> For that big an offset, I'd suspect the oven in the OCXO.
>>>
>>> John
>>> On Sep 11, 2020, at 5:41 PM, Dave McGuire <mcguire@...
>>> <mailto:mcguire@...>> wrote:
>>>
>>>
>>> ??????? I have a 5061A Cs-beam oscillator that was working great, in
>>> very
>>> ??? occasional use.? One day recently it refused to lock.
>>>
>>> ??????? A quick glance through the important stuff showed that the 5MHz
>>> ??? oscillator, with the loop open, in "Cs off" mode, was about
>>> 100Hz high.
>>> ??? I believe this is well outside the PLL capture range.
>>>
>>> ??????? Not stopping to think much, I cranked the coarse 5MHz
>>> oscillator
>>> ??? frequency adjustment down.? It hit the end of its travel with the
>>> ??? oscillator's output still being 40Hz high.
>>>
>>> ??????? Before I start digging in, can anyone offer any thoughts as
>>> to what
>>> ??? may have happened to the oscillator?? I had been performing
>>> flawlessly
>>> ??? until now, but I'd not checked its output in probably nine
>>> months, so I
>>> ??? don't know if the frequency drifted high, or if it "jumped".
>>>
>>> ??????? Any advice or thoughts on this would be greatly appreciated.
>>>
>>> ?????????????????? Thanks,
>>> ?????????????????? -Dave
>>>
>>>
>>
>>
>
>
>
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