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  #1  
Old 07-15-2019, 11:52 PM
Av8rRob's Avatar
Av8rRob Av8rRob is offline
 
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Default Bench power voltage

A buddy of mine loaned me a bench power supply that is putting out 14.8 volts. Seems a bit high, anything to worry about using it to test items in my plane as I build? It is an American made unit that goes up to 30 amps (not ebay **** from china).

Thanks
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  #2  
Old 07-16-2019, 06:56 AM
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Probably not a problem, but its a bit high for my liking. Theres always a voltage pot inside, so if it were me, I'd open it up and turn it down to 14.4 if you have something with rechargable batteries, 13s if you dont. No need to push the internal regulators of your expensive gear on the bench.

BTW unless your American supply is from the 1970s, its undoubtedly assembled with chinese parts.......just like everything else.
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  #3  
Old 07-16-2019, 10:26 AM
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set it to 14.2V if you can.
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  #4  
Old 07-16-2019, 11:29 AM
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Unfortunately the lowest I can set it with the little pot screw is 14.78. Any other ideas?
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  #5  
Old 07-16-2019, 11:47 AM
Mich48041 Mich48041 is offline
 
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Use an automotive battery.
Be careful not to reverse polarity.
Charge the battery when not powering the aircraft.
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  #6  
Old 07-16-2019, 07:20 PM
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Quote:
Originally Posted by Mich48041 View Post
Use an automotive battery.
Be careful not to reverse polarity.
Charge the battery when not powering the aircraft.
Sounds like a simple solution. Thanks
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  #7  
Old 07-16-2019, 10:51 PM
SHIPCHIEF SHIPCHIEF is offline
 
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Run the output thru a large diode, which will drop about a half a volt.
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  #8  
Old 07-17-2019, 04:28 AM
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Quote:
Originally Posted by SHIPCHIEF View Post
Run the output thru a large diode, which will drop about a half a volt.
Now thats an excellent idea. Something like this would probably fit your bill

https://www.amazon.com/NTE-Electroni...ct_top?ie=UTF8

Google for the datasheet....forward voltage is about .7v.......I'm sure you can find others.
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  #9  
Old 07-17-2019, 05:58 AM
Nova RV Nova RV is offline
 
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Rob look into an Iota power converter, they are used in the RV (Winnebago) world to run electronics at campsites with 110 power and have very clean output for electronics. They also charge 12v batteries. I have used one for 15+ years to power my big R/C battery chargers (30+ amps) and bought another one to run my avionics in the hangar.
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