I just did this mod to one of my '...PD18', and I used a 22.0k resistor. This mod with this value of resistor changed the output voltage from (measured) 12.5 to 13.4 volts, without adjustment. I left it there as it's close enough, and I wish to avoid any trouble. I *just* used it to power a 100 watt HF transmitter and it worked fine. Thank you for the information.
Works perfectly. For those hams out there. Don't go buying flashy expensive powersupplys. These are better than most. And do the job. Low noise for a Switching supply. I'm so happy I got two. That's about 40 dollars for both.
Dear Peter, thank you very much !! Made the mod and figured out that 14,00 V is possible but not recomended: becomes unstable, shuts off under load, doesnt start under load etc. looks like 14,05 V is the shut off level. wonder what is the function ofe the 2 other pots, couldnt figure out... maybe sombody knows ...... all in all your value 20k is the best ! Thanks again !!
A quick calc derated @13.8v they are good for 54 amps! Pretty damn impressive given that you can pick these up for under a tenner! No question - these are a real bargain if you are after high amps @"car" volts for super low cost!
Ham Radio manufacturers specify 13.8 volts + or - 15% for input power. This supply with no modifications to the circuit board can be adjusted to 12.7 volts which is well within the 15%. I have had no problems running my radios with the 12.7 volts. It's almost impossible to solder that resistor to the pot on the board. Your value for that resistor is 20K Ohms yet another video with the same modifications calls for 2.2k. I could not get either one to work with my supple so I adjusted it to 12.7 and it works fine.
I can confirm that 20K is much closer to the correct value, and that this works to 13.8 volts. I used a trim pot, so I'm not exactly sure of the final value. The multimeter doesn't give correct values once this is soldered in place. Also, there is a test pad to ground very close to that trim. Therefore the final mod need not be bigger than 1 cm. However, I feel that the supply is now too unstable. It almost trips the breaker on power up each time. Also, I need 14.7 volts in series (29.4v = 7S) and can't figure out how to disable the OVP. Likely I will just go back to stock.
Soldering was not easy, needed to use my 10x eye piece magnifier, but I did it with wire wrap size wire and the resistor in-between. I measured 13.95V but Im keeping mine at 13.8V
Hi Peter, nice mod to an old pc power supply. I modded an old Xbox 360 power supply for radio projects , added Anderson power poles to the 12v output (14A) also has a 5v, 1A supply too, handy for the RasPie projects. 👍
4 layer PCB....not too smart to drill holes for "nuts and bolts". It has been shown that this contributes to failure of this power supply. Soldering to the large positive and negative pads is a better idea.
i have the pd14. i can get the voltage to 13.8v but its very unstable. especialy when i connect a load. the OVP or OCP kicks in and i need to unplug the psu. how can i modify the protection to be higher?
They are ridiculously cheap for what they are. Not all Chinese-made stuff is crap, these are an industrial grade SMPS. I have 18 units of the 1200W version. I'm in the process of floating the output by insulating the appropriate metal stand-offs in the case. File back the stand-offs, then use nylon washers and screws. This allows for series and/or parallel configuration.
Have you tried adjusting the over-current protection circuit? Does anyone know how? I have the voltage set right where I want it. I have used the supply successfully with several radios, but when I try to power my FT-847 the supply trips when I turn the radio on. The radio FT-847 works just fine with my Jetstream switch mode supply. I am guessing the instantaneous current when I turn the 847 on is tripping the supply, but would listen to other theories!
@@johnnykarasonthomassen6971 Hi Johnny. My power supply shot down when I tried to power the transceiver. I just connected a large capacitor in parallel to the 13V output and it seems to compensate for the sudden current surge. I noticed that the more you increase the voltage, the more sensitive it gets. For me it worked best at 13.5V
@@wowzande I'm not 100% sure when it comes to wiring them in parallel, but I think it involves connecting the load sharing pins (not sure where they are, you could probably find it on a forum post). But sheesh, 2800w? I'm only bumping like 2-300 and that enough for me 😂
I will never run the subwoofers at full power. Iongevity . It will use maybe volumio with a raspberry pi? I design the box and everything else, truck line it.. Make it a fit a good spot in the house. I wanna go big! Hopefully not to ever trip my circuit breaker but I'm sure it will
Wondering if you know what the other potentiometers to the left of the 'set voltage' adjust? Current limit or some other function?? I could do with setting one at 15A.
Hi , you set that the blue model HSTNS-PL14 has a web page which describes how to mod. voltage. I could not find it, would you point me in right direction please ?
i have bought a HSTNS-PD29 power supply it only has two potentiometers in roughly the same place wondering if you figured one like out for the same modification to raise the voltage?
I'm a little confused -- Just to be sure I understand. 1. One end of the resistor connects to ground 2. The other end of the resistor connects to the upper left leg of the pot. 3. Is the upper left leg of the pot disconnected from the circuit board or still connected? 4. The lower leg of the pot is then disconnected from the circuit board and left unconnected? Thanks!
i use these for mining. 1200w ones are being sold for £80 but these are a tenner. So if I can do this mod it will give me how many watts output here in UK safely?
Hi Peter, I just followed what you've done in these video, but i have a problem, the voltage is not constant to 13.8volts. sometimes it goes to 12.85 and going up to 15v? please let me know how set the voltage to 13.8 volts? Cheers
Only if you did an actual load test monitoring the current, then we'd really tell for sure how many amps you can pull from it at 13.8v before it shuts itself down.
I just did the test, but my PSU is a PD-14 designed for 460W and 38,3 at 12 V. It goes up to 35 A with no problem. I use a variable dummy load and a Fluke 337 clamp meter. I left the voltage in 13,3V just by adding the resistor and, at 35 A, it drops to 13,1 V.
Hi Peter, Have a HP NSTNS- PD14 and put bridge between 33 and 36 or 1-4 pad but not getting green power up light any assistance would be greatly appreciate
At around 50 minutes you say that there is a web site for modding the PL14. I need to know how to start it and how to float the ground mod so I can connect in series and get 24v. Have searched and searched and found nothing. Thanks so much!
Hello, I have a HSTNS-PD14, this mod doesn't work for me, I think it's the overvoltage protection, how do I set the overvoltage protection? If I solder in a 20 or 22k resistor, it immediately recognizes the higher voltage.
Hi, I just accidentally touched the pins you talked about and isolated. Of course it no longer works, the green LED no longer lights up. Do you think it's completely destroyed? there is the possibility of entering into any protection. thanks. all the best
Hello. please help me, I accidentally made contact between those small pins, the fan went into speed and from that moment even if I make contact between the first and fourth pin, I don't have 12v and the green LED doesn't light up anymore. Did I burn her? Is there any chance it will work? thanks a lot
Hi Peter, thank you for the excellent video & share. Just a quick notice. Your actual PSU is a HSTNS-PL14 and not PD14 as mentioned in description. Mine is a PD14. The controller looks very similar but is not the same. I wonder if the same modification applies here. 73 de sv1onk
@@MrPknuts Many thanks for the link. Unfortunately my controller is different to the one shown at the link. Your circuit is much closer to mine. I think I 'm gonna give it a try, starting with a higher resistor and gradually drop it to 20K so I can safely monitor the behavior of the output voltage. Thanks again for your prompt reply.
I have a HSTNS-PD18 :-) not sure if the same mod will work. As far as I tested so far. Once I do the bridging 33 with 36 , I get 12.2 v output. I have noticed little bit of ~ current like 0.03 A while load testing with a 55w alogen lamp.
@@MrPknuts Thanks for that link as it is exactly my board. My French isn't that good, but I can see they shorted that resistor. Not obvious at first glance.
I doubt that these PSU are clean on their HF spectrum. Without any filtering on the secondary side you could easy load up your portable or nearby #HF antenna with unwanted #RF noise. You need some sort of filtering. If you like to get more evidence on that topic just have a look at Roberts video. ua-cam.com/video/1kFAyaeHwS8/v-deo.html I made the same experience. Be careful with open PSUs ... 73 es all the best
I just did this mod to one of my '...PD18', and I used a 22.0k resistor. This mod with this value of resistor changed the output voltage from (measured) 12.5 to 13.4 volts, without adjustment. I left it there as it's close enough, and I wish to avoid any trouble. I *just* used it to power a 100 watt HF transmitter and it worked fine. Thank you for the information.
Works perfectly. For those hams out there. Don't go buying flashy expensive powersupplys. These are better than most. And do the job. Low noise for a Switching supply. I'm so happy I got two. That's about 40 dollars for both.
Dear Peter, thank you very much !! Made the mod and figured out that 14,00 V is possible but not
recomended: becomes unstable, shuts off under load, doesnt start under load etc. looks like 14,05 V
is the shut off level. wonder what is the function ofe the 2 other pots, couldnt figure out...
maybe sombody knows ...... all in all your value 20k is the best ! Thanks again !!
ive done that mod and it work great on 13.8V. Only thing i noticed it the power supply easily gets HOT.
A quick calc derated @13.8v they are good for 54 amps! Pretty damn impressive given that you can pick these up for under a tenner! No question - these are a real bargain if you are after high amps @"car" volts for super low cost!
Ham Radio manufacturers specify 13.8 volts + or - 15% for input power. This supply with no modifications to the circuit board can be adjusted to 12.7 volts which is well within the 15%. I have had no problems running my radios with the 12.7 volts. It's almost impossible to solder that resistor to the pot on the board. Your value for that resistor is 20K Ohms yet another video with the same modifications calls for 2.2k. I could not get either one to work with my supple so I adjusted it to 12.7 and it works fine.
I can confirm that 20K is much closer to the correct value, and that this works to 13.8 volts. I used a trim pot, so I'm not exactly sure of the final value. The multimeter doesn't give correct values once this is soldered in place. Also, there is a test pad to ground very close to that trim. Therefore the final mod need not be bigger than 1 cm. However, I feel that the supply is now too unstable. It almost trips the breaker on power up each time. Also, I need 14.7 volts in series (29.4v = 7S) and can't figure out how to disable the OVP. Likely I will just go back to stock.
Soldering was not easy, needed to use my 10x eye piece magnifier, but I did it with wire wrap size wire and the resistor in-between. I measured 13.95V but Im keeping mine at 13.8V
23.2k ohm resistor is what you're supposed to use if you want 14.1 volts. I hear 13.6 is the maximum you can volt it and be stable
Hi Peter, nice mod to an old pc power supply. I modded an old Xbox 360 power supply for radio projects , added Anderson power poles to the 12v output (14A) also has a 5v, 1A supply too, handy for the RasPie projects. 👍
Thanks for the video, just built mine today, running perfect!
The PD18 is quad layer board so I would not drill bolt holes through it.
4 layer PCB....not too smart to drill holes for "nuts and bolts". It has been shown that this contributes to failure of this power supply. Soldering to the large positive and negative pads is a better idea.
Link for the website that tells how to modify to increase voltage pls!
i have the pd14. i can get the voltage to 13.8v but its very unstable. especialy when i connect a load. the OVP or OCP kicks in and i need to unplug the psu.
how can i modify the protection to be higher?
Great idea with the bolts
They are ridiculously cheap for what they are. Not all Chinese-made stuff is crap, these are an industrial grade SMPS. I have 18 units of the 1200W version. I'm in the process of floating the output by insulating the appropriate metal stand-offs in the case. File back the stand-offs, then use nylon washers and screws. This allows for series and/or parallel configuration.
What is needed to run these units together in a parallel setup?. I want to build a 200+ amp supply at 14v
Hi. By any chance, do you have a user guide for modding the HSTNS-PL14?
Have you tried adjusting the over-current protection circuit? Does anyone know how? I have the voltage set right where I want it. I have used the supply successfully with several radios, but when I try to power my FT-847 the supply trips when I turn the radio on. The radio FT-847 works just fine with my Jetstream switch mode supply. I am guessing the instantaneous current when I turn the 847 on is tripping the supply, but would listen to other theories!
Hello. It happened to me too. A large capacitor at the output does the job. I put 15000microFarads and never failed again. Didn't try with less.
@@Racov Would you please explain a little more :) best regards OY5ET
@@johnnykarasonthomassen6971 Hi Johnny. My power supply shot down when I tried to power the transceiver. I just connected a large capacitor in parallel to the 13V output and it seems to compensate for the sudden current surge.
I noticed that the more you increase the voltage, the more sensitive it gets. For me it worked best at 13.5V
@@Racov Yes I get the same 13,5 or 13,6 over that and it just shuts down :/
I'm using three of these in series with the voltage hack for a PA audio system amp. Thanks for sharing!
Hey can you tell me In your honest opinion the safest way to run 2 1400 watt server power supplies parralel for a car audio amp. I'm in the US.
@@wowzande I'm not 100% sure when it comes to wiring them in parallel, but I think it involves connecting the load sharing pins (not sure where they are, you could probably find it on a forum post). But sheesh, 2800w? I'm only bumping like 2-300 and that enough for me 😂
I will never run the subwoofers at full power. Iongevity . It will use maybe volumio with a raspberry pi? I design the box and everything else, truck line it.. Make it a fit a good spot in the house. I wanna go big! Hopefully not to ever trip my circuit breaker but I'm sure it will
@@wowzande I can get behind that philosophy. For my PA speakers I'm trying to decide between carpet and truck liner, lmk how your build turns out
@@isaiahhiggins I do have a speaker that I did truck line. How do I send you a message?
Nice clear description. Do you know if any of the smaller pins output 5 volts at a few amps?
Wondering if you know what the other potentiometers to the left of the 'set voltage' adjust? Current limit or some other function?? I could do with setting one at 15A.
Hi , you set that the blue model HSTNS-PL14 has a web page which describes how to mod. voltage. I could not find it, would you point me in right direction please ?
i have bought a HSTNS-PD29 power supply it only has two potentiometers in roughly the same place wondering if you figured one like out for the same modification to raise the voltage?
I'm a little confused -- Just to be sure I understand.
1. One end of the resistor connects to ground
2. The other end of the resistor connects to the upper left leg of the pot.
3. Is the upper left leg of the pot disconnected from the circuit board or still connected?
4. The lower leg of the pot is then disconnected from the circuit board and left unconnected?
Thanks!
Just add the 20k resistor in parallel with the pot.
i use these for mining. 1200w ones are being sold for £80 but these are a tenner. So if I can do this mod it will give me how many watts output here in UK safely?
Thanks, you have just answered my question :-)
hello, i wonder why the device is short-circuiting when I plug the resistor into my hp brand power supply, can you help
Hi Peter, I just followed what you've done in these video, but i have a problem, the voltage is not constant to 13.8volts. sometimes it goes to 12.85 and going up to 15v? please let me know how set the voltage to 13.8 volts? Cheers
Only if you did an actual load test monitoring the current, then we'd really tell for sure how many amps you can pull from it at 13.8v before it shuts itself down.
I just did the test, but my PSU is a PD-14 designed for 460W and 38,3 at 12 V. It goes up to 35 A with no problem. I use a variable dummy load and a Fluke 337 clamp meter. I left the voltage in 13,3V just by adding the resistor and, at 35 A, it drops to 13,1 V.
Hi Peter,
Have a HP NSTNS- PD14 and put bridge between 33 and 36 or 1-4 pad but not getting green power up light any assistance would be greatly appreciate
Don't drill the holes like he did, unless your sure it's ok, it's a multi layer board and you can easily brick the power supply.
how u know its ok to drill?
You have video adjust current? Thanks!
At around 50 minutes you say that there is a web site for modding the PL14. I need to know how to start it and how to float the ground mod so I can connect in series and get 24v. Have searched and searched and found nothing. Thanks so much!
Did you do any hp hstns-pr16 2450w mods. I have 1 but can't find any videos to get it up to 13.8. Any help would be appreciated
Hello, I have a HSTNS-PD14, this mod doesn't work for me, I think it's the overvoltage protection, how do I set the overvoltage protection? If I solder in a 20 or 22k resistor, it immediately recognizes the higher voltage.
I have the same problem, PD14 switches to device protection
Hello,
I want to slow the voltage to 10V-10.5V. Is it possible? And how to do it?
Thank you.
Hi, I just accidentally touched the pins you talked about and isolated. Of course it no longer works, the green LED no longer lights up. Do you think it's completely destroyed? there is the possibility of entering into any protection. thanks. all the best
Hey mate, how do you know which pad is + and which is - just by looking at it?
one next to small connectors is ground. other is 12+ lookup the pinout on google.
Use a multimeter
I have 18k and 22k resistors which one is more suitable
is there a link to youtube is there a link to the hp 460w dps-00F device model no.,?
i want to make 14.4v modified
Will this HSTNS-PD14 power supply come inside
For Yaesu ft-897D
13.8V (min 25A)
sure ! VE2DQB
@@jeanmandeville428 Hello buddy, how to convert so that I have 13.8V.
HSTNS-PD14
thank yoy
Hello. please help me, I accidentally made contact between those small pins, the fan went into speed and from that moment even if I make contact between the first and fourth pin, I don't have 12v and the green LED doesn't light up anymore. Did I burn her? Is there any chance it will work? thanks a lot
Hi Peter,
How does the fan noise sound? I had bought another brand of those server power supplies and the fan noise was to loud.
Whisper quiet. They do spin up faster if the unit gets hot but I've never had that happen with normal day to day use. Around 5 ~ 15A load.
Hi, can you tell me how to disable OVP to Delta DPS-750 nb?
thanks....
I have the go 460 watt how do I get the voltage higher please help
Hello hp dsp pl14 modified 14.4v ?
hello, i want to modify my hp brand pl 14 power supply device and take out 14v, can you help
Does anyone has a schematic or solution to increase voltage on the DPS 1200w PL19 version ?
Check out ( DPS-800GB Full Hack Including OVP Hack )
What to do because at 15A it pays out?
Hello. How do these work in parallel? If I get all to 13.8, can i parallel more than 1? Maybe 2 or 4 ?
Did you ever find out if these will work together in parallel setup?
@@captaininsano2777 yes. I built a bank with 4 in parallel. Set to 13.8v. Used to start cars, charge batteries, and power car stereo setups.
@@ATCA hey. How did you wire in parallel.
@@ATCAall i need to know is if pin 34 is the current share pin. The pin i connect the power supplies with.
Can you send me the website to modify the 460w
ua-cam.com/video/gO4luB08rFA/v-deo.html
That link doesn’t work did we find the info ?
Hi Peter, thank you for the excellent video & share. Just a quick notice. Your actual PSU is a HSTNS-PL14 and not PD14 as mentioned in description. Mine is a PD14. The controller looks very similar but is not the same. I wonder if the same modification applies here. 73 de sv1onk
Hi John, have a look here. Maybe this is the the mod you need ? on5vl.org/alimentation-petit-prix/
@@MrPknuts Many thanks for the link. Unfortunately my controller is different to the one shown at the link. Your circuit is much closer to mine. I think I 'm gonna give it a try, starting with a higher resistor and gradually drop it to 20K so I can safely monitor the behavior of the output voltage. Thanks again for your prompt reply.
I have a HSTNS-PD18 :-) not sure if the same mod will work. As far as I tested so far. Once I do the bridging 33 with 36 , I get 12.2 v output. I have noticed little bit of ~ current like 0.03 A while load testing with a 55w alogen lamp.
@@MrPknuts Thanks for that link as it is exactly my board. My French isn't that good, but I can see they shorted that resistor. Not obvious at first glance.
If you go to the french site that peter has linked you can use Google translate and it reads fine.
Hi great job but here a challenge to you. Can you hack a hp-dps 750ab-3 to 14.6V?
Robert Wartanian If you know then please tell us, How to increase the voltage upto 14.6????
Soldering iron😉
Fat finger in the way the whole time. Trying to take a screenshot.
this psu loud ?
no and its temp dependent
I doubt that these PSU are clean on their HF spectrum. Without any filtering on the secondary side you could easy load up your portable or nearby #HF antenna with unwanted #RF noise. You need some sort of filtering. If you like to get more evidence on that topic just have a look at Roberts video. ua-cam.com/video/1kFAyaeHwS8/v-deo.html I made the same experience. Be careful with open PSUs ... 73 es all the best