[time-nuts] Frequency satndard on ebay UK / sulzer manuals

[Timeok]

Hi Jeroen,

I have a paper copy of the SULZER 5A (the 5 MHz version) and of the 
Racal. If you want I can make a paper copy and send you it by postal 
service. I do not know if Tom have a pdf copy of the manuals. Me too 
have these OCXO for passion. I suggest you to buy e ceep GPSDO and use 
it as reference for your counter, so you can start to do accurate 
measurement and compare the standard you have (or will have) in your 
lab.

Let me know, for logistic use my direct email:  timeok at timeok.it


Luciano
IZ5JHJ
www.timeok.it



Il 2012-09-18 09:04 Jeroen Bastemeijer ha scritto:
> Dear Tom, Luciano, all,
>
> Thank you for your comments. The Sulzer is not intended to be used as
> a high accuracy standard. The oscillator fits nicely to some old
> radio's ;-) However, I think (not measured) that stability of the
> oscillator is better then the average stability of a modern low 
> budget
> oscillator.
>
> Therefore it would be nice to have it up and running. The schematic
> on the website of  Tom was very helpful. Basically it would be
> sufficient for trouble-shooting/repair. However, I would like to
> figure out the numbers which should be indicated by the moving coil
> meter on the front.
>
> I did a quick measurement with a HP counter 53230A (without a very
> stable reference). The number shown for the allen variation (after a
> couple of hours) was 1.5mHz on the 5MHz signal. (Maybe this number
> shows the stability of the HP....??) This number gives good hope,
> according to me.
>
> Is there a source for manuals on these instruments? I checked the
> site of KO4BB, unfortunately he doesn't have a PDF of the manual.
>
> Best regards, Jeroen
>
>
>
>
> On 09/17/2012 02:50 PM, Timeok wrote:
>> Yes Tom you right,
>>  but your example is on a rare Sulzer 2.5 MHz. Another very good 
>> reference can be an HP 106 (quasi impossible to find). This is not 
>> valid for the Racal model as described. I have had several unit of 
>> this standar under test and I keep one for my personal small museum. I 
>> have also a Suzer 5 MHz, it is better than Racal but same as 
>> performance to several others. I have an HP 107Br but it is not 
>> working and I cannot test it at the moment.
>>
>> All us are looking to find some units in flea market, old and good, 
>> but this is a very rare event due the fact there is a large 5e-10 
>> (OCXO)production or lower, and few top performance  products as you 
>> describe.
>>
>> good luck to us!
>>
>> Luciano
>>
>> Il 2012-09-14 19:32 Tom Van Baak ha scritto:
>>>> This equipment is only good to spend winter time or for museum. 
>>>> Several
>>>> newer oscillator,like HP10811/10544, have the same characteristics 
>>>> or
>>>> better in smaller size.
>>>> The component used ar not the best and you can have fault 
>>>> expecially on
>>>> the power supply.
>>>
>>> Luciano,
>>>
>>> My experience is that some of these old 2.5 or 5 MHz Sulzer
>>> oscillators have vastly better performance than most 10811/10544. 
>>> For
>>> example, see:
>>> http://www.febo.com/pages/oscillators/sulzer/
>>> http://leapsecond.com/museum/sul25-1/
>>> http://leapsecond.com/museum/sul25-2/
>>>
>>> While it is true that they don't always work out-of-the-box when 
>>> you
>>> find them cheap on eBay, once fixed, their performance is stunning.
>>> That's why these rare old Sulzer's are highly prized.
>>>
>>> /tvb
>>>
>>>
>>> _______________________________________________
>>> 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.
>>
>
>
> _______________________________________________
> 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.

-- 
timeok