paulktreg Posted June 19, 2008 Posted June 19, 2008 roadkill You can get 1kW with that set-up? My set-up, although not as well made, can only do about 750W before heat becomes a real problem and the maximum I am running any resistor at is 70% of its rated power. I have had to get four extra 1R 150W, one for each 12V line, to take me upto approximately 1300-1400W total. Will probably get four more to take me up to 2kW and that should do for a while. Can I ask what value the 150W resistors are and is it one per 12v line? Cheers Paul Share this post Link to post Share on other sites More sharing options...
anthony Posted June 19, 2008 Posted June 19, 2008 Hey Paul, thanks for your input! I haven't actually tested this thing yet, so the 1kw is entirly speculated, and theoretical. Heat will for sure be an issue, only I dont know how big of an issue till I hook it all up . How hot are your 150W resistors getting? The big ones I have are 150W 3R resistors. I might heatsink up the other side of the resistors too I guess, ive got tons of room ! These are the heatsinks I am using, http://cgi.ebay.com/ws/eBayISAPI.dll?ViewI...=tab%3DWatching. edit: no new updates for a few weeks... waiting on some more parts Share this post Link to post Share on other sites More sharing options...
paulktreg Posted June 20, 2008 Posted June 20, 2008 (edited) roadkill These are the resistors I have had to use: When on the 12V lines they dissipate 144W each, they get pretty hot and need fans to keep them from melting. They are rated at 1ohm 150W without the need for heatsinks but do need air cooling. Got these on ebay too. Apparently ex-russian miltary and I think I got them from Bulgaria or somewhere similar. The quality is actually pretty good and they do the job nicely. They are wirewound ceramic coated so they should withstand the heat. Time will tell. Your 150R resistors will only dissipate 48W each maximum on 12V. You appear to have five of these that will give 240W total. Have you not miscalculated somewhere or are you fitting more? Don't want to throw a spanner in the works, just trying to help. Regards Paul Edited June 20, 2008 by paulktreg Share this post Link to post Share on other sites More sharing options...
anthony Posted June 20, 2008 Posted June 20, 2008 OOPS typo! I meant 150W 1R ... sorry about that! They are Arcol HS1501R resistors. I will have air cooling, a 25 inch AC fan in the back of the sink, and 4 120mms at various spots. Those... russian mil ones, holy! Where did you find the mount for those? And btw, your not 'throwing a spanner', I really appreciate your help. Best I sort all the issues out now than find out later! =) Share this post Link to post Share on other sites More sharing options...
paulktreg Posted June 20, 2008 Posted June 20, 2008 OOPS typo! I meant 150W 1R ... sorry about that! They are Arcol HS1501R resistors. I will have air cooling, a 25 inch AC fan in the back of the sink, and 4 120mms at various spots. Those... russian mil ones, holy! Where did you find the mount for those? And btw, your not 'throwing a spanner', I really appreciate your help. Best I sort all the issues out now than find out later! =) I have used cast iron pipe mounting brackets for the resistors, not quite the right diameter but they do the job. Need any help at all just ask. Regards Paul Share this post Link to post Share on other sites More sharing options...
anthony Posted July 2, 2008 Posted July 2, 2008 It was a shelf till I took a dremel to it, previous page for 'before' pics edit nope, here http://forums.overclockersclub.com/index.p...d=1558512 From 3d page Small update, started doing the wiring. Just a tip, get a cheap crimp, and your hand will cry about it :angry2: (pics reduced to clean up thread) (btw, its not 3 resistors connected to molex) Share this post Link to post Share on other sites More sharing options...
anthony Posted July 7, 2008 Posted July 7, 2008 moved to previous page Share this post Link to post Share on other sites More sharing options...
anthony Posted July 14, 2008 Posted July 14, 2008 Biggest update 07/14/08 (how it all fits together) Share this post Link to post Share on other sites More sharing options...
paulktreg Posted July 14, 2008 Posted July 14, 2008 Does it work? Whats your maximum load? How's the temperatures? Am I jumping the gun here? Found a supplier for PCI-E 6 and 8 pin connectors if you need them. Need any help just ask. Regards Paul Share this post Link to post Share on other sites More sharing options...
hardnrg Posted July 14, 2008 Posted July 14, 2008 is the 120-80 adapter so that you can run ducting out the window? Share this post Link to post Share on other sites More sharing options...
anthony Posted July 14, 2008 Posted July 14, 2008 I havent really tested it with a real power supply yet (real being, a proper one) I did plug in my fan power supply, works of course, but didn't push it. So, I dont know how much of an issue heat will be yet. My massive snake nests of wires probably does not help . For the 6 pin and 8 pin connectors, I found some at performancePCs, work nicely, cept the screwed up half my order and sent me some male 4 pin molex connectors. Nrg, duct isnt for out the window, althoug that would be a good idea =). Duct goes from load tester to silverstone case, its to pump heat into the case where the power supply being tested will be mounted. A heatbox! Share this post Link to post Share on other sites More sharing options...
road-runner Posted July 14, 2008 Posted July 14, 2008 Nice , is this to test PSU for OCC also? Share this post Link to post Share on other sites More sharing options...
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