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

[Jeroen Bastemeijer]

Dear Luciano,

Thank you for your offer to make copies of the manuals. If it is OK with 
you, I can make a PDF-scan of the manuals and send them to KO4BB to be 
put on his website. I will contact you offlist for my address details.

Luckily enough I have a GPSDO, but... the GPSDO is at home and the 
counter is at work. A challenge to get these two together ;-)

Best regards, Jeroen PE1RGE

On 09/18/2012 10:30 AM, Timeok wrote:
> 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.
>