HP DPS-1200SB A power supply conversion. Final output 13.8v and up to 70A. 

REV09F ?

So you're saying that both resistors are 15k to get that voltage variance?

Rev 11F does not turn on with these values

Nice. Thanks for sharing. 73

Glad I can help, I always like to see videos that show how and what to do so I can exactly copy the project and be happy that actually works 😂. 73

... But BBI did... he has like 2 different videos... one video in particular tells which values for 14 14.8 and i think 15.5 volts as well as telling you where to put the resistors and which variable to mess with in case it goes into crowbar....

not sure about that. google your model number and maybe somone else did video for your model.

Glad I could help. Get the same exact model if you can. 73

I don't have experience with that kind of situation. I guess those power supplies work 24/7 in servers. I guess if you get one cheap try it for what you like to use it and see what happens. If anybody has any experience with HP power supplies running them all day long please comment. 73.

Not sure why drops to 12.8v. So far mine at 55 amp sits steady at 13.8v. Is it the same exact model ? Maybe you need to put different values of the resistors to bump the nominal voltage so when you put 60 Amp load it will drop to 13.5v or so. Check comments in hear maybe someone mentioned other resistor values that they used to bump the voltage over 13.8v.

@@myszaca thank you bro .mine is rev 06f maybe 09f is different

not sure if you buy another model it's gonna be the same. hard to tell. try to get the same one or check if anybody got video for the model you gonna buy. 73.

@@myszaca I will measure connections to see if they are the same 😊👍

So far no problem, I am probably pulling daily between 18 and 55Amp on and off to run my equipment in my station. Fan kicks in sometimes in to higher speed to cool off the power supply but that's normal. I actually can't believe that I was able to find this power supply and do the mod for that cheap. Even if it works for one year it's still worth it to buy another one and do the modification again. I do not see any side effects that would cause any noise or some interference causing my Anytone 5555N II to run funny or getting RF noise etc. I did put 60A fuse with automatic reset function at the output 13.8v power supply cable just so I don't overload the power supply over that value, I just like to have that not necessary but always extra protect ion. I think that's it, nothing bad happened that I would complain about. Not sure what kind of experience other people have with it but if someone likes to add some knowledge and advice we all would appreciate it. 73 from 0767 South California.

maybe someone did a video with your version. 73

when you plug the power supply to the outlet watch the fan it should kick in for a second and depending on outside temp it may spin very slowly. At the end of the video I showed where the sensor should be relocated to control the fan more accurately so it cools it faster. 73

So far I have no issues with my power supply. Works fine.

Don't see any interference on my side. That was a statement from BBI guy that it runs clean. So so far all good. If you run that power supply with higher current draw for a longer time it will get warm and the fan will kick in in higher rpm, I can hear it but not too bad. I installed this power supply behind the cabinet so I don't hear it too much. Like they say different stations have different experiences. If you get one for cheap try it. Maybe run it with 12v only before converting to higher voltage and see if you get any weird issues. 73.

try 15k for both resistors!

maybe for 220v cable version since this will run 110v or 220v

Good question. Honestly I have no clue. Never run that with 220v. One way to know would be to try it and see what you will get. I think input voltage doesn't matter what you gonna get on the output. You may be able to push more amps from 220V. Maybe someone in hear from Europe did that conversion and will give us some answers.

In Aus and I used 1/4w 15k and 51k resistors and got 14.4. Humming like a dream. Many thanks to 767 and Mr BBI. Really appreciate the video.

@@peterkomninos122 Thanks for sharing. Glad that I was able to help. 73.

Foot Warmer from eBay 😂,🤪.

I put the load on it and it was able to do it for some time. I needed max 60A so I didn't push it too hard. Plus watch videos of the MR BBI channel about this power supply, he explains all. Links in description.73

1200 Watts divide by 13.8 volts = 86.95 Amps

😂, good one.

www.ebay.com/itm/285116561630?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=BF3VjAoYRwi&sssrc=2349624&ssuid=luhS-baRQ6u&var=&widget_ver=artemis&media=COPY /////////// This ones are refurbished. Can't imagine they will be bad because they are refurbished. It will give you an idea of where to look for it. ///////////// www.ebay.com/itm/264423637554?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=aY7OL6JIRbO&sssrc=2349624&ssuid=luhS-baRQ6u&var=&widget_ver=artemis&media=COPY

I got the switch so just in case if I want to remove wires and connect to something quickly etc I won't make a short. Up to you what you like to use, it really doesn't matter if you have a jumper or switch. To kill the power to this amp circuit board to prevent constant draw I have to switch my power cord to off position every time I am done for the day 😂 . So really one or the other works fine.

@@myszaca Okay, thank you. 😃

scroll down in comments sections I gave someone else a link to resistors I bought on Amazon. 1/4watt. I used 20 and 51 kohm resistors. when you use 15 ohm may not work. go to my links in description where I have links to BBI channel. I copied his idea and changed the resistors value to what I want and it worked,got lucky. He is mentioning other values and voltages somewhere in those two videos. start with that. If you want more then 13.8v then see his video and listen to what he says about resistor values etc. It is possible that your crowbar protection is kicking in and cutting power, not sure about that because I didn't come up with that idea. Watch his video if you need more than 13.8v output. If you put the same resistors as I did and it doesn't work then it's a hard one because diagnosing that kind of issue here is almost impossible. make sure soldering connection points are good and ohm the circuit from the leg at the transistor to the end of the leg at the 20kohm resistor or 15ohm and see if you have continuity ,not open circuit etc. I would definitely start with BBI videos and see what he is talking about resistors etc. maybe other people who did one of those had the same issue may share their experience. FYI make sure it's the same model also. 73.

@@myszaca 20k and 51k?

Maybe he is out of the power supplies already. Someone will sell them. Got to be the same model number. Good Luck and 73.

15v will reduce the amps down to 80

Nice. So far I made 3 of them and they work like a charm.