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philips retro power supply


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#1 saxonman

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Posted 13 October 2011 - 03:04 AM

I just bought a philips 1960's/70's power supply with three voltages 6,7.5,10 volt but when i test it the voltage is 6.9,8.5,and 10.4 why is this i changed the caps but still the same, before i start using this power supply is the voltage dangerous to use on my box's??? or are these early power supply's just like this?? if not how can i repair it?? it seems pretty simple and i have the skill to replace componants any help will be great thanks

#2 Superduper

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Posted 13 October 2011 - 03:17 AM

Unregulated power supplies always have no-load voltages higher than spec'd. Once a load is connected, the voltage will drop. The higher the current draw, the lower the voltage will be. I don't believe you have anything to worry about. I've tested no-load voltages on the M9994 (12v box) @ 16-17 volts and the M90, I've observed around 21volts on a (15v box).

#3 saxonman

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Posted 13 October 2011 - 04:41 AM

thanks superduper thats all i needed!!

#4 monchito

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Posted 13 October 2011 - 02:54 PM

:thumbsup: ok i guess i can connect my mega volt powersupply to my boxes :w00t: :w00t: :w00t: :lol: :lol: :lol: :lol:

#5 Superduper

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Posted 13 October 2011 - 08:12 PM

Not after hearing your description of your ham radio power requirements Ramon.