PC power supplies

V

Vesku

Guest
I bought couple of used PC power supplies to get 12 V supply. Table on
supply says 8 A with +12 V. But when connect to mains, voltage only 10 V
without load. When connecting to load that should take 2..5 A with 12-14
V supply, voltage at +12V goes down to about 6 V and current probably
only one amp or so (I did not measure)

Manufacturer Zeck, model ZKS-620T, I didn't find spec fron web.

Should there be some load on +5V as well to have +12 functioning
properly and if yes how much ?

Is it possible to connect two or three separate PC power supplies +5V
outputt in series to get +10 or +15 V ?

br Vesku
 
put a 5 watt 100ohm resistor on the 5v+
to ground, i do that with all mine and work fine.

john

"Vesku" <noveskuspam@geekmail.de.invalid> wrote in message
news:cjmco3$ut$1@phys-news1.kolumbus.fi...
I bought couple of used PC power supplies to get 12 V supply. Table on
supply says 8 A with +12 V. But when connect to mains, voltage only 10 V
without load. When connecting to load that should take 2..5 A with 12-14
V supply, voltage at +12V goes down to about 6 V and current probably
only one amp or so (I did not measure)

Manufacturer Zeck, model ZKS-620T, I didn't find spec fron web.

Should there be some load on +5V as well to have +12 functioning
properly and if yes how much ?

Is it possible to connect two or three separate PC power supplies +5V
outputt in series to get +10 or +15 V ?

br Vesku
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