[time-nuts] HP 5370B Leds pulsing slowly, buttons selecting normally, PB ...

GandalfG8 at aol.com GandalfG8 at aol.com
Sat Jul 6 13:29:35 UTC 2013


Running load might not be quite as bad as you'd expect, switching them  all 
on at exactly the same time would probably cause a nice fat  pulse but 
perhaps that's a bit extreme:-), allowing an adequate margin  though is always a 
good idea.
 
If you could tap into the supply and get an idea of running  current that 
would be a good start, after that it's likely to come  down to an appropriate 
autotransformer, fixed or variable, one of the older  style saturable 
reactance type constant voltage transformers, or perhaps an  "online" UPS, 
sinusoidal to be preferred, that will handle the input  voltage and regulate the 
output.
 
The latter would probably be the best, or easiest anyway, option these  
day, and assuming it meets your voltage and current needs then the off mains  
hold up time, unless you do need that too, probably wouldn't be too  much of 
an issue so that could help keep the cost down.
 
Regards
 
Nigel
GM8PZR
 
 
 
In a message dated 06/07/2013 13:26:06 GMT Daylight Time,  
marks at non-stop.com.au writes:

I  reckon, the line voltage here is 250v and the equipment is set for 240V, 
that  extra 10V on the mains is why I am having so much equipment failure.
Also  the Heat sink on the 5370B got so hot I mounted a 5" fan across it to 
keep it  at a respectable temperature.

How can I drop the Mains to 240V, I have  a boat load of gear that needs to 
be powered concurrently.
(8566A, 8568B,  3585A, 5335A, 5370B, 8901A, etc, powered on together) we 
are starting to talk  some serious current there.



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