[hackspacebristol] Massive HP 6268B laboratory power supply up for grabs: it needs fixing

EJEDV/J.Egger office at ejedv.at
Sun Nov 1 11:09:47 UTC 2015


Thank you very much Marcus!

Was too busy the last days and away since Thursday. 

Regards,
Joe

Von meinem iPhone gesendet

> Am 29.10.2015 um 23:07 schrieb Marcus Valentine <marcus at marcusv.org>:
> 
> Hi Joe
> 
> The power supply is at now the hackspace, on the left hand end of the
> work bench.
> 
> Best
> 
> Marcus
> 
>> On 26/10/2015 16:33, Marcus Valentine wrote:
>> I have an HP 6268B laboratory power supply, (0 to 40V, 0 to 30A, in a 3U
>> rack mount case) which I used for many years.
>> 
>> http://www.keysight.com/en/pd-1000001533:epsg:pro-pn-6268B/dc-power-supply
>> 
>> The manual, containing schematics, parts list and component layouts is here:
>> 
>> http://literature.cdn.keysight.com/litweb/pdf/5950-1766.pdf?id=734358
>> 
>> In Section 3-32, the manual states
>> 
>> "When using remote voltage sensing, it is possible to damage the supply
>> by disconnecting a load while the sensing lead is still connected ..."
>> 
>> Foolishly, this is exactly what I have done.
>> 
>> Despite by best efforts and the comprehensive documentation in the
>> manual, I haven't managed the locate the fault (R107 and R109 seem fine,
>> as do other components I have investigated).
>> 
>> I am now admitting defeat, and offering this power supply to anyone who
>> fancies having a crack at getting it going again.
>> 
>> When working, it's ideal for powering your latest doomsday machine project.
>> 
>> Collection from BS7 preferred.
>> 
>> 
>> Marcus



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