Joe
I never cease to amaze myself, today I re-routed the remoted pump to tidy it up, and get it a bit further away as it could be heard humming slightly. Got it all plumbed in running just testing for leaks and decided I'd check the input neck clamp on the pump was tight. Turned it the wrong way. My god! an Eheim 1060 can create some output with no flow restriction, I got drenched.
Anyway the goal is achieved
silence. It may not be 100% absolute silence but as the only thing I can hear if I strain when sitting at my PC is the monitor I consider that silence. It's been a fun project with many different parts, the PSU cooling success being perhaps the most satisfying. In truth it's still in testing as it could yet fail or not cope with the summer but for now it's working fine, also no hardware has been killed during or by the project build.
gmat
The drives are IDE 7200 ata 100
The mosfets are plastic packaged except the back plate but the screw hole and an area around the hole is also plastic so the blot does not come in electrical contact with the back plate. All I have do is transfer the mosfets as they were on two heatsinks (that were live, no apparent reason for the liveness), to a water block that is not live keeping all the isolating mica shims as they were on the sinks. These mica isolators have good thermal properties and excellent electrical isolation. can be bought from Maplin in the UK and probably Radio Shack in the USA.
I wasn't sure if this lack of a "liveness" to the sinks would be a problem but in asking around it didn't appear to be. I'd researched this PUS cooling for 6 months to ensure it had a good chance of success and would be safe. The water block is earthed so would trip the RCD if there were any leakage.
As said it's working fine but still very much in beta testing. The silence is wonderful.
Here is how the block is mounted which also helps cool the transformer a bit. It's a copper and brass "table" that fits snugly over the transformer casing. the water block is then bolted to it. pipe unions exit the side of the PSU to ensure any pipe connection drips are outside the PSU and it's spun the other way up to help the natural heat rise of the PCB.
