[time-nuts] Sulzer 5A & 5P PSU/battery question

Adrian rfnuts at arcor.de
Fri Nov 2 02:21:26 UTC 2012


and here is the corresponding Racal manual:
http://www.ko4bb.com/Manuals/Racal/Racal_MA2595Mc-s_Precision_Frequency_Standard.pdf

Unfortunately, the schematic of the Sulzer manual is incomplete. So, the 
above manual might be useful.
Just the oven control circuits differ a little, but the oscillator stuff 
appears to be exactly the same.

Adrian


paul swed schrieb:
> Thanks for the pointer I have a pretty dirty pdf from some place the links
> very clean.
> Paul
> WB8TSL
>
> On Thu, Nov 1, 2012 at 7:24 PM, Magnus Danielson <magnus at rubidium.dyndns.org
>> wrote:
>> On 11/01/2012 10:27 PM, Attila Kinali wrote:
>>
>>> On Thu, 01 Nov 2012 21:51:21 +0100
>>> Magnus Danielson<magnus at rubidium.**dyndns.org<magnus at rubidium.dyndns.org>>
>>>   wrote:
>>>
>>>
>>>   Yesterday I picked up a Sulzer 5A + 5P without batteries. It is supposed
>>>> to have 21 D-cell NiCd batteries, but today those are not easy to come
>>>> by,
>>>>
>>> NiCd Batteries still exist, but have been mostly replaced by LiIon/LiPoly
>>> packs these days. Though, you should be still able to find NiMH batteries,
>>> which are in most cases a drop in replacement for NiCd, if you keep
>>> two things in mind:
>>>
>>> 1) The maximum charge current of the battery should never be exceeded.
>>> NiCd were much more forgiving in that regard.
>>>
>>> 2) When charging finished, then the batteries need to be disconnected
>>> unless you do a trickle charge. At least this was a problem with the
>>> early NiMH, it might have changed in the past 15 years. Check datasheet.
>>>
>>> 3) Charge end detection for fast NiCd chargers (>1C) does not work with
>>> NiMH as the negative Voltage slope of NiMH is not as pronounced as with
>>> NiCd. If you have such a charger, you need to replace it with a modern
>>> one.
>>>
>> Thanks for the input guys!
>>
>> The manual for them both is at
>> http://www.ko4bb.com/Manuals/**09)_Misc_Test_Equipment/**
>> Sulzer_Laboratories_Model_5A_**Frequency_Standard.pdf<http://www.ko4bb.com/Manuals/09)_Misc_Test_Equipment/Sulzer_Laboratories_Model_5A_Frequency_Standard.pdf>
>>
>> The 5P manual describes the charging operation, it has a 50 mA charge
>> current, a fast charging feature.
>>
>> By the look of things, the way that the design is done, it should survive
>> without the battery-pack installed.
>>
>>
>> Cheers,
>> Magnus
>>
>> ______________________________**_________________
>> time-nuts mailing list -- time-nuts at febo.com
>> To unsubscribe, go to https://www.febo.com/cgi-bin/**
>> mailman/listinfo/time-nuts<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.
>





More information about the time-nuts mailing list