I modified the HP1200 supply with the black power connector quite a few years ago so I could get 14.6volts. Thank you for showing the mods on the 1200sb(blue power connector). Can't wait to mess around with one. I did make a variable external voltage control for the black connector 1200, and had it controlling 2 of them. It's still working like a charm as my bench power supply.
I've seen that mod before but a long time back. I never got around to buying any of these but this video reminded me. I just found two for $60 total including delivery. Done.
"Now i am going to talk like a ham operator" lol. Thanks for the video great information and just a prime example of why you are the best and always will be
@@BoxBuilderIdaho being humble and willing to share information that is basically unheard of in your business. I have learned more from watching your videos then anyone else. I thank you sir
Good Evening BBI FANS and Friends: Nice job Luke with these HP switching modules. Your hard work & talent is much appreciated. My best as always to you & your family, TMP, Unit 22 from N.J.
Super cool I'm thinking 3 of these tied together then hooked to an insulated copper feed bar should be enough to handle a couple radios and a transistorized amp when I'm not running the base amp. Thank you Luke and 249 for sharing this knowledge 😁
I have heard of guys slaving a bunch of units in a bigger box with larger slower moving fans and extra filter caps etc. They use an old school 555 Timer IC to mimic the RPM signal. They measure the pulses the unit expects to see an set the 555 IC to send that signal constantly. Oh I cut this from another reply. The fans in these units are usually 3 wire and the 3rd wire sends RPM speed signal to a controller. I have not done this myself though. They mount a bunch of these in a bigger box with big slow moving fans and large filter cap banks and then mimic the fan signal to keep everything happy! Hope this helps someone!
Sweet BBI, I've been using them for about five years and I appreciate the extra tip on the resistors. 516 a local Builder here in Indianapolis has been using those and a couple of different versions. And there sure are a lot cheaper then the meanwell power supplies also longer-lasting. Peace and blessings out there keep up the good work. You're 47 around the fields of Indiana the all seeing third I got down right there.
Mr BBI, some feedback if I may. I purchased two of these units for some projects that I had. One was to be used as a simple 12v supply to a 3000lb winch for my tower, which it does very well without modification. Good by old lead acid battery and charger setup. Its fed 230/240v volts (I'm in the UK) and it drives the winch at its nominal 60-80 amp load. It even supported a peak of 135a when I deliberately stalled the winch without tripping out! Excellent I then modified the second unit as i wanted a good quality shack 13.8 (ish) volt supply for my ham gear. To get 13.8v i needed 20K of resistance across the voltage adjust point, and i used your suggested 51k on the crowbar circuit. So far so good. I will report back if i have any issues when this is in use. I can confirm the units are very quiet acoustically(less noise than my linear unit!) and I haven't had any noise on my receiver from them yet. Cheers Des, GI0UTE.
Not really. As you change the resistance value on the voltage side you would also need to change the resistance value on the crow bar protection side. It is not likely to be a linear relationship so you would need a programable system that would change both in relationship to your input. Not saying it could not be done but not in the fashion you are thinking about. These are designed to be completely and total stable with next to zero ripple and to run continuously for X number of hours and then be pulled and hot swapped for a new unit! imagine having 20 of these running under the control of another controller that brings them all seamlessly into play as needed. There is likely that capacity already on the board but without knowing the instructions in each IC it is hard to know where to start. In this situation it is better to say "Yes please!" and "Thank You" and take it for what it is! If you for instance had one of these NOS imagine running it at it's rated output for 8000 hours continuously at it's rated load and voltage and 95% of these in its doing that all day and night with out a hiccup! Try that on a non-server supply and in no time it would fail. At the rated 12.5V this on 200+V this unit would give BBi the full 100amps. Luke is trading some current capacity for more voltage but the total watts the unit can do stays the same. He is also making it less temperamental with regard to how fast the load can be applied with out tripping the protection circuit. Thanks for the share BBi!
Thank you, Mr. BBI for this really cool info i picked up 2 of these units ..looking to put one in a RCI 2995 .thats been plagued with power supply issues ...
You need to try one one these... DELTA AHF-2DC-2500W-PE 2500 Watt Power Supply This is a 208 amp @ about 12.3V 200-240V input. can get them for around 30 to 40 bucks. I have a few here I'm testing with. Runs a sweet 16 with virtually no power drop. still trying to mod the voltage up and figure out the protection circuit . There is no info on them for mods anywhere. So this one is going to be a hard nut to crack. I did not have any noise on my IC-7300 receiver too which was a big Plus.
I have repurposed similar switchmodes before, they don't like the load suddenly removed, the response time means they tend to crowbar. Amazing value for money though... and the crowbar issue can be addressed...very tempted to buy a few of these, 14v will be fine for my purposes. Tempted to just use high current diodes to combine a pair, unfortunately that will whack the efficiency a bit. Thank you for taking the time to do the video...
Another Win. Thanks BBI. I have one of these up and running and a 2nd one on the way. The way your videos are done the haters are shut down. Thank you for your service to the radio community. Best 73 OM.
If anyone is interested, I can supply information on how to mod Delta BML 353 206/2 (~70A @ 27V charger/rectifier) for different output voltages. Also figured out digital control information for Emerson/Vertiv rectifier (eg R24-2500 and R48-3000, 24V and 48V at 2.5/3kW). All modules are or at least were quite cheap on the telecom surplus market. The digital control information likely also works for a 12V Vertiv rectifier module, but I never saw or touched one.
A *really* needed hack to this PS is to add an adjustable current control. That is to make it a constant current PS with a max voltage limit. This is needed for viable battery charging. Some one how figures this out would be a hero !
Thanks for sharing 👍 I will be calling you tomorrow this is awesome especially for someone on a fixed income like me I like the video so much I watched it 4 times
Just got my DPS1200 SB and getting ready to do mods. Im going with the 9K and 18K resistors. I did not see in any of your videos if the resistors are 1/8,1/4 watt. Thanks
Wow! Mr. BBI i been messing around with these and have not been successful they always end up shutting down dude you're a BEAST NO DOUBT ABOUT THAT 73's
That is awesome. Now with clone 2879s becoming more easily available and hopefully closer to original specs, kind of makes me want to go retro lol. If I stacked them I'd have to pull from multiple house circuits LoL😅 Great Video.
@@robertmeyer4744 Right, that was later in the video and I had already commented. That is pretty cool auto switching too! If I did a stack, I would still probably use isolation diodes into a nice stiffening cap. I tell you, I may get one just to build a jump start booster. LoL 70+ amps is nothing to sneeze at lol.
Luke, thank you so very much for all of your videos. I am going to try and make one for my broke ass self . Love the comments about Bob and Fred . But this Fred just had 2 rods, 10 screws and 4 degreed cages added to my L2-S1 and finally getting to spend about 10 minutes to get my own damned socks on. About 3 years ago I had seen a video in one of my groups running a server power supply for his radio. But I never continued to follow-up with him. 73 2WR003 Fred in the Shed in the Swamps of Dinsmore Florida
Bird meters used to be the industry standard for power indication 50+ years ago when nothing else was available. Fast forward to 2023, no respectable professional engineer would want to use a Bird Thru Line meter to measure power they are a coarse indicator at best. The running joke is "Bird Thru line meters are for those that want to see lots of power where there is none".
Hi master, thank you for all the great knowledge you share with us. Quick question….what would I need to add to make one of this into a suitable battery charger? Thanks in advance!
@@DownloaderVideo you'd have to add a circuit that ramps the voltage up and down. So I guess you could get on Amazon and you could use a timed voltage controller and fluctuate the resistance on the 14k resistor that controls the voltage reference. I'm just shooting from the hip I don't know I've never really sat down and thought about it
@@BoxBuilderIdahoAnother question, are you aware of variations depending on the revision? I just got 2 and same model and everything except these are Rev16. Thank you!
I would think if you were to stack 2 or 3 of these and run a variable voltage option, you may be able to find a variable resistor within the value range needed for the crowbar circuit. You would just need to mark the values of your variable resistor on the outside of the cabinet or wherever mounted on a rack. Just an idea though.
They look great. was wondering about the hash noise on them. The last 2 blue label base amps I did was china PS blown. 1 converted to ICA IRON core outher Meanwell supply's but the cost. I got 2 meanwell SE 1500-15 on my test bench. they RFI pretty quite. but the cost ! 73's
Very good video. OK, so I'm in the UK that uses 240v, would I still use the same resistor values? Also, when searching for resistors, they also mention eg., 1/2W 5% tolerance, is this figure important?
Fantastic video, I’ve been using them in Rc for some time now. With the increased voltage. How would I go about reducing voltage to 8v for testing motors ?
I make /run a different hp server power supply that is 65 Amp rated at factory settings. I figured out how to get the voltage to 12.55 cont I nious with a drop of only .05 when approaching max output. I have the fan also running so slow it can hardly be heard. It only ramps up approaching max current output. The power supply has reverse polarity protection and overload protection and direct short protection. Almost impossible to blow up. Protects the equipment it is powering. All this is accomplished without removing the cover. All done with jumping pins on the end. I connect 2 together using the common share pin connection . I use number 6 all copper welding cable for out put connections. I have and my friends I built some for have left them running for over 4 years continuously. Never had a failure yet but if one fails I will replace it no charge. I hooked to carbon pile load tester and got 70 amps without shutting down and that was good enough for me. Search for pin outs for the common share connection when combining. It equally distributes the load. When over voting from factory design the early attempt proved to be unreliable and failures. I hope this has been solved by BBI. 12.55 with no current or little voltage drop is perfect for Mr with a quiet fan. These were designed to run 365 days a year from the factory. Never got a bad one from ebay just dirty sometimes and I believe all were used to some extent.
Sub just for the humor! What do you think a good combo would be for running Just ham radios and ham related equipment? I don't have nor plan on right now to have any amps as I'm just getting into ham. My first radio is a Ft-857D but I plan on getting a 7300 or the new FTDX-10. Seems like most, at least 100W, radios use " 13.8 v +- 15% or 2V for a nominal range of 11.8 to 15.8V" as the range. Would trying for a 14.5-15V be a good landing place? I assume from the manual you don't want to go over 15.8V so that's where the cut off or Crow bar should come in before that?
Thanks in advance. Any detailed pics for exactly where to solder the resistors /size K? l did this once with a HPE 1200W DPS-1200FBA PSU but they are hard to find these day's That was only 2 resistors as l remember.
If a small switch was wired into the tabs up front instead of a jumper would that be safe to turn the power supply off and on? Wanting to hook two units together for a 200 amp 240v supply
finally!! I have 2 of these for sale actually I had 4. I have access to unlimited amounts of them for free. Im throwing one in a 1x2. trying to mount them is what I am figuring out and howto tie them into a switch.
Be aware that there are typically TWO DIFFERENT VERSIONS of these power supplies. The PD version you show, and a PL version. The boards are somewhat different. Mods are not the same.
might be worth checking out gaming computer power supplies..they can get big numbers and some are switchable ..obviously they are more pricey but could be another option.they have built in fans and such for cooling.
Normal PC PSUs have unneeded voltages and usually cost MUCH more. Server PSUs are typically designed to be run 24/7/365 with minimal down time so are the better choice.
After watching 3 times it's occurred to me maybe an experiment in destruction is in order. With some ratty amplifier that's been left unpaid and most importantly doesn't have Toshibas in it.. To see what happens if the crowbar protection After modification kicks in or fails to kick in entirely and the PSU Chernobyl's? I wonder what the rectified voltage is at the FREDs. Is there post regulation after high frequency rectification or is it controlled by the switchers feeding the toroidal with input amplitude while still an AC signal. I should get mine soon but I will want to know what it's failure mode is because they certainly have one. It's probably all good. But Toshibas are pricey to learn on!
@@cavidoman I have found that there are some similarities between a few of the modules but none of the modifications are in the same place with the same valued resistors
I also modified my DSP-1200 SB A with a 22k and a 56 resistor to get a perfect 13.84V for my Icom Ham radio. Work fine for a few days but then went completely dead. Opened it up and noticed the 22k resistor got detached from the varible leg. Soldered it back on but doesn’t go on. It’s completely dead. is there a fuse somewhere in the PS? Any Clues if it can be fixed?
I ask about the resistance watts because I use 1 watt (15k-51k), and it looks like it doesn't work. Yours look smaller. After the mod works for a minute and I reconnect the power and the fan works only at a high speed and no green led, no voltage output any help? Thank you
I've got one of those power supplies that you waved across the screen at the beginning running my old Cobra 148GTL radio. Has been working for 5 or more years perfectly. It peaks at 20 amps which this radio never draws that. But the darn fan runs all the time. Can't figure that one out. Have you had this problem before with these?
Iv seen the DSP 1200fb A has been hacked on YT but they didn't show the video properly. they said to go on your page but I don't see it. Was it the same way you did the SB ?
You can parallel these out of the box, there is also a load sharing pin on most ... Best is to get the server that these go into an build a hot plug redundant PS. See the top comment that I posted earlier.
I use 1 watts resistor after the mod turns on with 13.9 volts, but after 1 min, the voltage lowered to 13.3 no load. unplug the power and plug again, and no power is coming out. No led light and fan stock on high speed. Do you have any idea what could be wrong?
Thanks for the video. I am very interested in modding this psu. I can't find the seller though. I search for hopin-around and I think the seller changed the name. Do you still have contact with the seller?
hello sir,i have 1200w 100A max hp power supply PD-19,just wanna ask if i done that trick can i charge my 22A Lifo4 battery pack?will the battery damage or someting,?thanks in advance!🙂
Installed a 15k on the outside and 51k on the inside. Powers up at 14.4 volts then after maybe 20 seconds voltage drops to nearly zero with no load. Triple checked the solder points and no shorts. Any ideas?
Been trying to find a breakout board for this model. 1 website claims the fb breakout board will work with the sb a. Anyone know for sure? I know Im not the only one thats curious!! SmogControl 3311 TJ Border Controller
Very well aware I'm. Very very well aware but when the Crowbar protection is automatically set so high you cannot search even half of the rated output for the power supply it needs to be adjusted at that point
RC and crypto mining guys have been hacking these for years now. If you buy an old server, that these go into, you get a nice slide slot and typically an adapter board where these plug into. You can use that to get a redundant, hot pluggable PS that does load sharing. These can be also connected in series for higher voltage but that is bit more involved operation.
How much would you charge to modify one for 14.9 v if I bought one because I have a nerve condition can not solder my hands shake to much when trying to do certain things
@@SDS-1 Yes! If you wanted to say run a 5Ch car amp in your garage or basement for some affordable power. Most of these units use a 3 wire fan and the fan sends RPM info back to the controller. I have heard of guys slaving a bunch of units in a bigger box with larger slower moving fans and extra filter caps etc. They use an old school 555 Timer IC to mimic the RPM signal. They measure the pulses the unit expects to see an set the 555 IC to send that signal constantly.
Just wanted to say you really need to pay attention to the hstns# also I bought 2 dps1200sb and mine were hstns pl30 not pd30 totally different control board
![Twenty One Pilots - The Line (from Arcane Season 2) [Official Audio]](http://i.ytimg.com/vi/XCz7WUotXs8/mqdefault.jpg)
I modified the HP1200 supply with the black power connector quite a few years ago so I could get 14.6volts. Thank you for showing the mods on the 1200sb(blue power connector). Can't wait to mess around with one.
I did make a variable external voltage control for the black connector 1200, and had it controlling 2 of them. It's still working like a charm as my bench power supply.
I've seen that mod before but a long time back. I never got around to buying any of these but this video reminded me. I just found two for $60 total including delivery. Done.
"Now i am going to talk like a ham operator" lol. Thanks for the video great information and just a prime example of why you are the best and always will be
Who me? Nope that a lot of people helped me get this way so it's not me it's all these other people
@@BoxBuilderIdaho being humble and willing to share information that is basically unheard of in your business. I have learned more from watching your videos then anyone else. I thank you sir
Good Evening BBI FANS and Friends: Nice job Luke with these HP switching modules. Your hard work & talent is much appreciated. My best as always to you & your family, TMP, Unit 22 from N.J.
This is an AWESOME video. It is exactly what I'm running with my als500m- works great.
Fantastic power supply for the price and great modification
Super cool I'm thinking 3 of these tied together then hooked to an insulated copper feed bar should be enough to handle a couple radios and a transistorized amp when I'm not running the base amp. Thank you Luke and 249 for sharing this knowledge 😁
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I have heard of guys slaving a bunch of units in a bigger box with larger slower moving fans and extra filter caps etc. They use an old school 555 Timer IC to mimic the RPM signal. They measure the pulses the unit expects to see an set the 555 IC to send that signal constantly. Oh I cut this from another reply. The fans in these units are usually 3 wire and the 3rd wire sends RPM speed signal to a controller. I have not done this myself though. They mount a bunch of these in a bigger box with big slow moving fans and large filter cap banks and then mimic the fan signal to keep everything happy! Hope this helps someone!
Sweet BBI, I've been using them for about five years and I appreciate the extra tip on the resistors. 516 a local Builder here in Indianapolis has been using those and a couple of different versions. And there sure are a lot cheaper then the meanwell power supplies also longer-lasting. Peace and blessings out there keep up the good work. You're 47 around the fields of Indiana the all seeing third I got down right there.
Thank you Mr.BBI your the best teacher I know. Bless you and yours
Mr BBI, some feedback if I may. I purchased two of these units for some projects that I had. One was to be used as a simple 12v supply to a 3000lb winch for my tower, which it does very well without modification. Good by old lead acid battery and charger setup. Its fed 230/240v volts (I'm in the UK) and it drives the winch at its nominal 60-80 amp load. It even supported a peak of 135a when I deliberately stalled the winch without tripping out! Excellent
I then modified the second unit as i wanted a good quality shack 13.8 (ish) volt supply for my ham gear. To get 13.8v i needed 20K of resistance across the voltage adjust point, and i used your suggested 51k on the crowbar circuit. So far so good. I will report back if i have any issues when this is in use. I can confirm the units are very quiet acoustically(less noise than my linear unit!) and I haven't had any noise on my receiver from them yet.
Cheers Des, GI0UTE.
Did the same mode 20k and 51k, 13.8V. Works awesome.
Ordered 10 for the price now to just build out the power supply and get something that needs that many amps. thank you sir. good honest content
Not really. As you change the resistance value on the voltage side you would also need to change the resistance value on the crow bar protection side. It is not likely to be a linear relationship so you would need a programable system that would change both in relationship to your input. Not saying it could not be done but not in the fashion you are thinking about. These are designed to be completely and total stable with next to zero ripple and to run continuously for X number of hours and then be pulled and hot swapped for a new unit! imagine having 20 of these running under the control of another controller that brings them all seamlessly into play as needed. There is likely that capacity already on the board but without knowing the instructions in each IC it is hard to know where to start. In this situation it is better to say "Yes please!" and "Thank You" and take it for what it is! If you for instance had one of these NOS imagine running it at it's rated output for 8000 hours continuously at it's rated load and voltage and 95% of these in its doing that all day and night with out a hiccup! Try that on a non-server supply and in no time it would fail. At the rated 12.5V this on 200+V this unit would give BBi the full 100amps. Luke is trading some current capacity for more voltage but the total watts the unit can do stays the same. He is also making it less temperamental with regard to how fast the load can be applied with out tripping the protection circuit. Thanks for the share BBi!
Thank you, Mr. BBI for this really cool info i picked up 2 of these units ..looking to put one in a RCI 2995 .thats been plagued with power supply issues ...
You need to try one one these... DELTA AHF-2DC-2500W-PE 2500 Watt Power Supply This is a 208 amp @ about 12.3V 200-240V input. can get them for around 30 to 40 bucks. I have a few here I'm testing with. Runs a sweet 16 with virtually no power drop. still trying to mod the voltage up and figure out the protection circuit . There is no info on them for mods anywhere. So this one is going to be a hard nut to crack. I did not have any noise on my IC-7300 receiver too which was a big Plus.
I have repurposed similar switchmodes before, they don't like the load suddenly removed, the response time means they tend to crowbar. Amazing value for money though... and the crowbar issue can be addressed...very tempted to buy a few of these, 14v will be fine for my purposes. Tempted to just use high current diodes to combine a pair, unfortunately that will whack the efficiency a bit.
Thank you for taking the time to do the video...
BBI your awesome,I came up with 14.39 and that's fine for me and it runs my Texas star 350 beautifully.
I bought one 3 years ago and have never modified it, they are very good for charging RC cars, trucks etc.
Another Win. Thanks BBI. I have one of these up and running and a 2nd one on the way. The way your videos are done the haters are shut down. Thank you for your service to the radio community. Best 73 OM.
If anyone is interested, I can supply information on how to mod Delta BML 353 206/2 (~70A @ 27V charger/rectifier) for different output voltages. Also figured out digital control information for Emerson/Vertiv rectifier (eg R24-2500 and R48-3000, 24V and 48V at 2.5/3kW). All modules are or at least were quite cheap on the telecom surplus market. The digital control information likely also works for a 12V Vertiv rectifier module, but I never saw or touched one.
BTW: The 48V model works as a very under-powered, but nonetheless functional, welder ;)
A *really* needed hack to this PS is to add an adjustable current control. That is to make it a constant current PS with a max voltage limit. This is needed for viable battery charging. Some one how figures this out would be a hero !
Thanks for sharing all this Master Luke from 2WR/NB267
Thanks for sharing 👍 I will be calling you tomorrow this is awesome especially for someone on a fixed income like me I like the video so much I watched it 4 times
Just got my DPS1200 SB and getting ready to do mods. Im going with the 9K and 18K resistors. I did not see in any of your videos if
the resistors are 1/8,1/4 watt.
Thanks
Awesome video mr. BBI. Thanks for taking the time to do this. Game changer. You da man. 28chicago got down. 73’s.
Wow! Mr. BBI i been messing around with these and have not been successful they always end up shutting down dude you're a BEAST NO DOUBT ABOUT THAT 73's
I agree sharing information like this is what keeps the cb community going 73's god bless
That is awesome. Now with clone 2879s becoming more easily available and hopefully closer to original specs, kind of makes me want to go retro lol. If I stacked them I'd have to pull from multiple house circuits LoL😅 Great Video.
that why run on 240V . less AC input amps.
@@robertmeyer4744 Right, that was later in the video and I had already commented. That is pretty cool auto switching too! If I did a stack, I would still probably use isolation diodes into a nice stiffening cap.
I tell you, I may get one just to build a jump start booster. LoL 70+ amps is nothing to sneeze at lol.
Luke, thank you so very much for all of your videos. I am going to try and make one for my broke ass self . Love the comments about Bob and Fred . But this Fred just had 2 rods, 10 screws and 4 degreed cages added to my L2-S1 and finally getting to spend about 10 minutes to get my own damned socks on. About 3 years ago I had seen a video in one of my groups running a server power supply for his radio. But I never continued to follow-up with him. 73 2WR003 Fred in the Shed in the Swamps of Dinsmore Florida
Bird meters used to be the industry standard for power indication 50+ years ago when nothing else was available. Fast forward to 2023, no respectable professional engineer would want to use a Bird Thru Line meter to measure power they are a coarse indicator at best. The running joke is "Bird Thru line meters are for those that want to see lots of power where there is none".
I recon you prefer Dosey because lord knows RF engineers 50 years ago had absolutely no idea what they were doing. You made me laugh out loud !
thank you for showing me about this little trick im new to cb. and i did my first one today i got 14.94 volts.
I've been a fan of the HP for about 5 years now and I have always run them at the 12volts
The now pretend you're a ham operator was so spot on. I laughed out loud.
Lol if you only new.....
Hi master, thank you for all the great knowledge you share with us. Quick question….what would I need to add to make one of this into a suitable battery charger?
Thanks in advance!
@@DownloaderVideo you'd have to add a circuit that ramps the voltage up and down. So I guess you could get on Amazon and you could use a timed voltage controller and fluctuate the resistance on the 14k resistor that controls the voltage reference. I'm just shooting from the hip I don't know I've never really sat down and thought about it
@ Thanks Master, I’ll research about that.
@@BoxBuilderIdahoAnother question, are you aware of variations depending on the revision? I just got 2 and same model and everything except these are Rev16.
Thank you!
Sr, Thank you for your time doing this video, does it matter and which direction I solder the resistor? Thanks
Thank you Mr. BBI getting ready to try and do one
Thanks BBI. I got one on the way to play with.
I would think if you were to stack 2 or 3 of these and run a variable voltage option, you may be able to find a variable resistor within the value range needed for the crowbar circuit. You would just need to mark the values of your variable resistor on the outside of the cabinet or wherever mounted on a rack. Just an idea though.
Thank you kindly Brother Luke!
They look great. was wondering about the hash noise on them. The last 2 blue label base amps I did was china PS blown. 1 converted to ICA IRON core outher Meanwell supply's but the cost. I got 2 meanwell SE 1500-15 on my test bench. they RFI pretty quite. but the cost ! 73's
Very good video. OK, so I'm in the UK that uses 240v, would I still use the same resistor values? Also, when searching for resistors, they also mention eg., 1/2W 5% tolerance, is this figure important?
Fantastic video, I’ve been using them in Rc for some time now.
With the increased voltage. How would I go about reducing voltage to 8v for testing motors ?
I like it! Once again your da man. Thanks for sharing your knowledge.
I make /run a different hp server power supply that is 65 Amp rated at factory settings. I figured out how to get the voltage to 12.55 cont I nious with a drop of only .05 when approaching max output. I have the fan also running so slow it can hardly be heard. It only ramps up approaching max current output. The power supply has reverse polarity protection and overload protection and direct short protection. Almost impossible to blow up. Protects the equipment it is powering. All this is accomplished without removing the cover. All done with jumping pins on the end. I connect 2 together using the common share pin connection . I use number 6 all copper welding cable for out put connections. I have and my friends I built some for have left them running for over 4 years continuously. Never had a failure yet but if one fails I will replace it no charge. I hooked to carbon pile load tester and got 70 amps without shutting down and that was good enough for me. Search for pin outs for the common share connection when combining. It equally distributes the load. When over voting from factory design the early attempt proved to be unreliable and failures. I hope this has been solved by BBI. 12.55 with no current or little voltage drop is perfect for Mr with a quiet fan. These were designed to run 365 days a year from the factory. Never got a bad one from ebay just dirty sometimes and I believe all were used to some extent.
Where do you modified the fan
Sub just for the humor! What do you think a good combo would be for running Just ham radios and ham related equipment? I don't have nor plan on right now to have any amps as I'm just getting into ham. My first radio is a Ft-857D but I plan on getting a 7300 or the new FTDX-10. Seems like most, at least 100W, radios use " 13.8 v +- 15% or 2V for a nominal range of 11.8 to 15.8V" as the range. Would trying for a 14.5-15V be a good landing place? I assume from the manual you don't want to go over 15.8V so that's where the cut off or Crow bar should come in before that?
Thanks in advance. Any detailed pics for exactly where to solder the resistors /size K? l did this once with a HPE 1200W DPS-1200FBA PSU but they are hard to find these day's That was only 2 resistors as l remember.
Thank you Bbi can you please make a video step-by-step how to do that thank you
If a small switch was wired into the tabs up front instead of a jumper would that be safe to turn the power supply off and on? Wanting to hook two units together for a 200 amp 240v supply
You got it
i have been using one of these for years as psu and its been great. 🤷♂️
Great Video. Thank you for that. Got one also and did the mode. Working great 👍.
Excellent video, thank you!
finally!! I have 2 of these for sale actually I had 4. I have access to unlimited amounts of them for free. Im throwing one in a 1x2. trying to mount them is what I am figuring out and howto tie them into a switch.
Free? I’ll take four. 😂
Well Luke Miller this is beyond my soldering skills and eyes....lol
Starting to think even me to had to put on the jeweler's loupe last night after about 20 of them
Be aware that there are typically TWO DIFFERENT VERSIONS of these power supplies. The PD version you show, and a PL version. The boards are somewhat different. Mods are not the same.
might be worth checking out gaming computer power supplies..they can get big numbers and some are switchable ..obviously they are more pricey but could be another option.they have built in fans and such for cooling.
Normal PC PSUs have unneeded voltages and usually cost MUCH more. Server PSUs are typically designed to be run 24/7/365 with minimal down time so are the better choice.
After watching 3 times it's occurred to me maybe an experiment in destruction is in order. With some ratty amplifier that's been left unpaid and most importantly doesn't have Toshibas in it.. To see what happens if the crowbar protection After modification kicks in or fails to kick in entirely and the PSU Chernobyl's? I wonder what the rectified voltage is at the FREDs. Is there post regulation after high frequency rectification or is it controlled by the switchers feeding the toroidal with input amplitude while still an AC signal. I should get mine soon but I will want to know what it's failure mode is because they certainly have one. It's probably all good. But Toshibas are pricey to learn on!
Hello, do you think it's the same procedure for the 1400w one? I have a dps1400 cb and wanted to do the same thing to mine. Thank you
@@cavidoman I have found that there are some similarities between a few of the modules but none of the modifications are in the same place with the same valued resistors
I also modified my DSP-1200 SB A with a 22k and a 56 resistor to get a perfect 13.84V for my Icom Ham radio. Work fine for a few days but then went completely dead. Opened it up and noticed the 22k resistor got detached from the varible leg. Soldered it back on but doesn’t go on. It’s completely dead. is there a fuse somewhere in the PS? Any Clues if it can be fixed?
Can you show us where to solder the resistor for the fan and the value please and thank you, I ordered 4
Thank you so much Luke!!!!
My life would be changed LUKE if I can figure out how to voltage mod the Dell E2700P-00 220A I can hold in the palm of my hand ✋
Fyi the 1400 watt 240v can be used as well
I ask about the resistance watts because I use 1 watt (15k-51k), and it looks like it doesn't work. Yours look smaller. After the mod works for a minute and I reconnect the power and the fan works only at a high speed and no green led, no voltage output any help? Thank you
I've got one of those power supplies that you waved across the screen at the beginning running my old Cobra 148GTL radio. Has been working for 5 or more years perfectly. It peaks at 20 amps which this radio never draws that. But the darn fan runs all the time. Can't figure that one out. Have you had this problem before with these?
1w metal film resistors can be used? what type did you use?
Iv seen the DSP 1200fb A has been hacked on YT but they didn't show the video properly. they said to go on your page but I don't see it. Was it the same way you did the SB ?
Thank you Sir
Curious what the min/max voltage range was when you used the 9k and 18k ohm resistors.
Assuming the pot still sets the voltage.
Thanks
10k/20k I’m see a range from 15.4-16v .
nice job,,, thanks for sharing man
I can't find the seller.
Could you use a variable resistor to set the voltage...make it easier to parallel 2 or more together?
You can parallel these out of the box, there is also a load sharing pin on most ... Best is to get the server that these go into an build a hot plug redundant PS. See the top comment that I posted earlier.
I need 13.6-13.8 volts, but only 50 A or so. Does anyone know the resistor values for that voltage?
been using them for awhile for just radio power or 2 pill testing without any mods 12.2 volts
Strange.. the lowest I can get using the resistors you recommended for 14.8v is 15.05 🤔
Very well done 👏
I use 1 watts resistor after the mod turns on with 13.9 volts, but after 1 min, the voltage lowered to 13.3 no load. unplug the power and plug again, and no power is coming out. No led light and fan stock on high speed. Do you have any idea what could be wrong?
I would double-check your solder joints on the inside and make sure that you've got decent insulation all around the leads of your resistors.
Thanks for the video. I am very interested in modding this psu.
I can't find the seller though. I search for hopin-around and I think the seller changed the name. Do you still have contact with the seller?
Bbi I really think you're on to something here.
hello sir,i have 1200w 100A max hp power supply PD-19,just wanna ask if i done that trick can i charge my 22A Lifo4 battery pack?will the battery damage or someting,?thanks in advance!🙂
Installed a 15k on the outside and 51k on the inside. Powers up at 14.4 volts then after maybe 20 seconds voltage drops to nearly zero with no load. Triple checked the solder points and no shorts. Any ideas?
Yeah the Crowbar protections taken over so drop the resistor down to 9k for the Crowbar protection which is the one on the inside of the unit
Working perfectly at 14.2V! Thanks for the video!@@BoxBuilderIdaho
Does anyone know the value of the voltage control potentiometer? Somehow managed to damage and lose the one on mine....Help please
Been trying to find a breakout board for this model. 1 website claims the fb breakout board will work with the sb a. Anyone know for sure? I know Im not the only one thats curious!!
SmogControl 3311 TJ Border Controller
What resistors do I need for the output Vdc of 14.7vdc?
@@danialphaomega9kohm crowbar and 12 k ohm for the voltage adjustment
@BoxBuilderIdaho
Thanks BBI!
and 73s from southern AZ
Well you going to start making a little boxes and putting them in there and sell them?
I ordered mine with offer and BBI sent me, it says 467 sold
You know "crowbar" is not used for current. It's for over VOLTAGE! Normally a triac fires at the max voltage threshold, and causes the fuse to blow.
Very well aware I'm. Very very well aware but when the Crowbar protection is automatically set so high you cannot search even half of the rated output for the power supply it needs to be adjusted at that point
So how much would it cost 2 build a 1000 amp power supply
BBI That finger you hit the wrong nail.
Does the type and tolerance of the resistors used matter?
Wonder what the DC purity looks like as the load increases over time?
RC and crypto mining guys have been hacking these for years now. If you buy an old server, that these go into, you get a nice slide slot and typically an adapter board where these plug into. You can use that to get a redundant, hot pluggable PS that does load sharing. These can be also connected in series for higher voltage but that is bit more involved operation.
amazing!
👍👍✌
Has anyone measured these for RF noise?
Zero
What and where do you put the resistor for the fan?
By the way, I love your vids
How much would you charge to modify one for 14.9 v if I bought one because I have a nerve condition can not solder my hands shake to much when trying to do certain things
I could set that up. Call me tomorrow
@Mr BBI will do thanks
@@BoxBuilderIdaho I called you left you a voice mail I know your busy you can call me anytime thanks
@@BoxBuilderIdahohow we can contact you?
How do they work stock at 12 volts??? Is it still very sensitive to sudden current?
No
Alright let me start over they work fine they're not too overly sensitive
@@BoxBuilderIdaho lol 😂 thank bud
@@BoxBuilderIdaho I'm thinking they would be perfect for car audio Deck tinkering. 12v would be all id need 🙂✌️
@@SDS-1 Yes! If you wanted to say run a 5Ch car amp in your garage or basement for some affordable power. Most of these units use a 3 wire fan and the fan sends RPM info back to the controller. I have heard of guys slaving a bunch of units in a bigger box with larger slower moving fans and extra filter caps etc. They use an old school 555 Timer IC to mimic the RPM signal. They measure the pulses the unit expects to see an set the 555 IC to send that signal constantly.
I just ordered 4
Better give schematics then its easy too make greetz from holland 73,
Just wanted to say you really need to pay attention to the hstns# also I bought 2 dps1200sb and mine were hstns pl30 not pd30 totally different control board
plenty of power just don't like the turbo prop