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Icepick
| | Posted on Saturday, October 18, 2003 - 12:34 pm: | 
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In theory....... Would it be possible to run two 48 amp power supplys in paralel to run a 60 amp pull from my 667V ? For that matter, what about a 40 amp and a and a 25 amp supply in paralel?? Any and all coments are much welcomed!!! Thanks, Icepick. |
Bruce
| | Posted on Saturday, October 18, 2003 - 1:58 pm: |
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ice it can be done some supplys have sence leades to let you do that ask the people who made your supply |
Kc0gxz
| | Posted on Saturday, October 18, 2003 - 4:19 pm: |
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Icepick
I've been doing just that for quite some time now. I have two paralelled 52 Amp Pyramids that I use in my shop for mobile amplifier repair/testing.
Your 48s will work together just fine "BUT", they both have to be set at the same, identical voltage level. I can't stress that enough. If you have built-in volt meters on them, DO NOT use them to adjust the voltage on the two supplys. Instead, be sure to use a volt/ohm meter.
I have both of mine set at 14.0 volts.
Look for my E-mail address in my profile if you have any questions. There is something else that I did for ease of operation if you're interested.
Jeff, kc0gxz.
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Hootyal
| | Posted on Saturday, October 18, 2003 - 5:18 pm: |
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Make sure they are both putting out the same voltage also. |
Johnhenre
| | Posted on Thursday, January 08, 2004 - 5:34 am: |
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I HAVE A 10 VOLT 200 AMP POWER SUPPLY OPERATES ON 220 VOLT I'VE STRIPPED IT DOWN TO JUST THE TWO TRANSFORMER )BIG) AND THE RECTIFIER,AND CAP'S BUT I GOT 24 VOLT DC COMING OUT,SO WERE CAN A PERSON GET A ITEM THAT WILL LET ME RUN BETWEEN 12 TO 16 VOLTS DC,AND CONTROLL THE CURRENT OR AMPS SO I WANT FRY AN AMPLIFIER? ANY TECH's OUT THERE THAT CAN LEAD ME THE RIGHT WAY. THANK'S |
Bigbob
| | Posted on Thursday, January 08, 2004 - 7:24 pm: |
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Buy a 317t voltage regulator and 10 NTE 30,300 watt pnp transistors and you'll need an appropriate heat sink,this'll give you 129 amps at 12 to 14 volts,attach the emitters to the input,attach the collectors to the output stud,attach the bases to the input pin of the 317t,attach a 3 ohm resistor to the input pin of the 317t and to the emitters,connect a 390 ohm resistor to the adjust pin and output pin of 317t,connect a 5000 ohm pot to adjust pin and ground,connect the output pin of the 317t to the collectors,attach a 10 mfd cap to adjust pin and ground,there you have a 129 amp P.S. that will really kick some but t,for more amps just add more NTE 30s,figure with an input of 24 volts divided into 300 watts gives 12.9 amps per transistor,now when you load her up if the input voltage drops to 20 then those same transistors will put out 15 amps,some big power supply.Bigbob |
Bigbob
| | Posted on Thursday, January 08, 2004 - 7:24 pm: |
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Buy a 317t voltage regulator and 10 NTE 30,300 watt pnp transistors and you'll need an appropriate heat sink,this'll give you 129 amps at 12 to 14 volts,attach the emitters to the input,attach the collectors to the output stud,attach the bases to the input pin of the 317t,attach a 3 ohm resistor to the input pin of the 317t and to the emitters,connect a 390 ohm resistor to the adjust pin and output pin of 317t,connect a 5000 ohm pot to adjust pin and ground,connect the output pin of the 317t to the collectors,attach a 10 mfd cap to adjust pin and ground,there you have a 129 amp P.S. that will really kick some but t,for more amps just add more NTE 30s,figure with an input of 24 volts divided into 300 watts gives 12.9 amps per transistor,now when you load her up if the input voltage drops to 20 then those same transistors will put out 15 amps,some big power supply.Bigbob |
Bruce
| | Posted on Thursday, January 08, 2004 - 11:00 pm: |
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bigbob 129 amps now THAT'S a power supply! |
Bigbob
| | Posted on Friday, January 09, 2004 - 6:39 am: |
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I must say I am incorrect as to the amps out maybe knock off 10 %,but you can add more transistors ,so its either what you want or what you can afford,I used an incorrect formula in figuring out the amps,sorry,Bigbob |
Johnhenre
| | Posted on Friday, January 09, 2004 - 7:32 pm: |
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BIG BOB THANK'S DO YOU KNOW WERE I CAN GET A DEAL ON THE PART'S I NEED TO BUILD MY POWER SUPPLY BOB |
Bigbob
| | Posted on Saturday, January 10, 2004 - 6:33 pm: |
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NTE,online,radio shack,RFparts,online,and you can procure a 1/2 farad or 1 farad cap for filter cap from audio store or get a bunch of 4700mfd caps and connect in paralell,from rad.shack.The neat thing about this supply is the 317t is the heart of the beast,it has a lot of safety factors built into it,to prevent damage to the gadgets it's hooked to,if you want an over voltage protector,get an industrial scr,say 200 amp,install it between the +and- cables right after the fuse,use a 15 volt zener diode for the trigger,I put a 100ohm res. in series with the zener,I tried mine before putting it online,man it popped the fuse RIGHT NOW,cool,so there you have it.I bet you could do this with a 24v submarine battery. |
Johnhenre
| | Posted on Saturday, January 10, 2004 - 11:41 pm: |
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THANK'S BIGBOB FOR THE INFO.THE UNIT IS ALREADY SET UP TWO TRANSFORMOR; BIG RETIFIER;ON A BIG HEAT SINK ;TURBO FAN ;TWO BIG ALUMUINM BUZZ BARS WITH (4) SPRAGUE CAPS 200000-15DC.SETTING UNDER AND BOLTED TO THE BUZZ BAR'S BOB IF YOU CAN E-MAIL ME A ROUGH SCHEMATIC TO KINDLY TO GO BY IF YOU CAN? IF IT WAS A SIMPLE 12AMP POWER SUPPLY I'V BUILT A FEW BUT THIS IS GOING TO COST I THINK AND DON'T WANT TO SMOKE AND CHOKE ON IT BOB |
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