Help finding DC power supply please. 10A 14V

[Moddoo]

Hello guys,
I am looking for a current regulated power supply that is rated to at least 10 Amps.

Voltage range should reach 14V minimum.

Adjustable output.

Digital readouts needed.

Single output is fine.

110 AC input.

I have found a few online, but hoping you guys can help.

Can this be had for around $150?


Thanks

 

[alpg88]

car battery charger wioll give you 10 amps, and around 15v

 

[Moddoo]

car battery charger wioll give you 10 amps, and around 15v

I need an adjustable precision instrument for the testing of prototype torches.

 

[Norm]

Have a search for Manson power supplies, they make a range of good switch mode power supplies that are inexpensive.
Norm

 

[VidPro]

get car charger of very high amperage, snag the fat transformer out of it, use big mondo bridge rectifyer (like the 25 or 50amp) , or make it yourself with Huge heat potted metal type Shotkey diodes to keep the voltage up. tack in a big fat capacitor and or coils to balance it out and fully flatten the DC.
use huge round heat synced variable voltage regulator and 10 turn pot to control it.

add in one of those 5-15V led single readout voltage meters, the accurate bigger one , and a ampmeter, one cheap way to do this is an old analog ampmeter , then ride it off of a fat Shunt.
fuse the input , and the output , or use curcuit breakers for the output and fuse the input.
total cost about $100 , value as good as you make it. by being a fat Linear power supply, it will be around for the next 20 years or more, and it will be reasonably efficient use of power.

 

[Kestrel]

I need an adjustable precision instrument for the testing of prototype torches.

I for one can't wait to see what's coming out after it's tested on your power supply.

 

[Bright+]

Would 13.8v fixed, 10A be acceptable? They're pretty cheap on eBay

 

[SemiMan]

You want a precision instrument for a $1.00/watt... give your head a shake... ;-) ... if you want precision you have to pay for it .... and you tend to get what you pay for.

Semiman

 

[jasonck08]

I would think you can pick up a decent lab style power supply with an adjustable voltage and aperage knob for around $100.

 

[Mr Happy]

I would think you can pick up a decent lab style power supply with an adjustable voltage and aperage knob for around $100.

I think 10 A makes it a bit more difficult though...that seems quite a hefty current requirement for a fully adjustable precision supply? (Based on my brief market surveys, at least.)

 

[LumenHound]

Digital readouts needed

This is the requirement that's tough to meet if you need 10 amps.
Looks to be some available with digital readouts at 6 amps output under $150 but not much more.

Scour the kit market, maybe there is something that can meet your needs if you are willing to put it together first?

 

[poguy]

Except for the 14 volt requirement, you're looking for the same kind of power supply amateur radio operators use. Most of those are in the 13.5-13.8 range the radio expects to see, and also what comes from a car electrical system.

10 amps isn't a lot, and I would go for something bigger to keep things running cool. I would look for a used one to keep cost down. Hamfests are good places to look.

Note: Always ask the seller to demo the unit. There will be an elecrical outlet somewhere to plug it in. Get his name, callsign, address and phone number, and make it clear that if it doesn't work you are coming back for a refund. Most people are OK, but the few that aren't spoil it for all of us.

 

[Mr Happy]

Except for the 14 volt requirement, you're looking for the same kind of power supply amateur radio operators use.

I believe Moddoo is looking for a lab power supply with voltage finely adjustable between 0 - 14 V and current regulation finely adjustable between 0 - 10 A. Power supplies like that with digital readouts for voltage and current do not tend to come for $150 in my experience...

 

[VegasF6]

I bought a linear power supply, Mastech HY3010D.
http://www.mastechpowersupply.com/d...ear-power-supply-30v-10a-hy3010d/prod_11.html

Switching is a bit cheaper.
http://www.mastechpowersupply.com/d...-dc-power-supply-30v-10a-hy3010e/prod_14.html
(out of stock)

New model, the HY3010EX, this is news to me as well, so check the specs:
http://www.mastechpowersupply.com/d...-voltage-over-current-protection/prod_70.html

Mastech may not be the most high end equipment available, but I have been pretty happy with mine. My biggest complaint by far is meter resolution, only .1A and .1V.

eBay is a good source for these as well. Of course, look at others experiences here.
http://www.candlepowerforums.com/vb/search.php?searchid=4921729

 

[Moddoo]

Thank you guys,
this is helping me get closer to what I need.

Mr Happy, and VegasF6 are on the right track for sure.

Now I am wondering if I should go with the linear or the switching type?

The Mastechs should be fine for my current needs.

I'll read some more on these supplies on the forum.
However, I am not an Electrical engineer, so it is a bit tough for me.

I wish that I could build my own, but am not ready for that project yet.

Thanks, and keep it coming please.

 

[VegasF6]

My limited understanding is noise and ripple our a factor between the two types. You should get cleaner power with linear, but then, it runs hotter, is heavier, and slightly more expensive than switching type.

There is a guide here you can read (if you haven't seen it.) I was thinking I had read one type was better for metal plating as well, but I am a bit fuzzy on the details.

Prevailing wisdom says to pony up as much as you can now, so you won't have to re-purchase in the future. There has already been 2 instances where I wished for the HY3020D instead of the 3010 that I bought. In fact, if times were better for me, I would offer to sell it to you so I could upgrade.

Here is a page from ancient history where luxluthor had the same question. I followed his lead as charging batteries was something I expected to do.
http://www.candlepowerforums.com/vb/showthread.php?t=176589&highlight=mastech+linear

 

[poormanq45]

for the digital readouts you could simply buy two digital multimeters. upgrade the probe wires and hook them into the output circuit.

this would give you digital readouts for under $20 additional.

 

[dafeichu]

If you are ever in the mood some day to make your own, this project is top notch. 30V, 10A.

 

[Lynx_Arc]

I wonder if it is possible to just use a computer power supply and adjust the regulator for 14vdc instead of 12 as they typically can do more than 10amps on the 12v rail these days. You may be even able to combine a 3.3v and a 12v rail and get 15.5v and these can be bought for cheap everywhere.

 

[Moddoo]

thanks for the help guys.

I just ordered a Mastech 3020D

Hopefully this will be all I need for a little while.:devil: