luvdunhill Posted November 9, 2008 Report Share Posted November 9, 2008 So, I'm working on a pair of monoblocks. swt61 has seen these monster heat sinks. 12.2" wide x 12" tall with 2.925" fins and 0.326" base, weight is 13 pounds... and I got four. I've done some thermal plots of 6 devices per heatsink on a small PCB. Each device is dissipating 14.8W x 6 devices x 4 channels ~ 350W. I'm wondering how much further I can push the devices. The sim data is very close to actual temperatures and since I don't want to drill holes under the devices for thermal probes, the simulator will be gospel. I don't really want to move the devices apart anymore, as I have a PCB in mind I'd like to accommodate, plus a design of my own. Datasheets for devices: http://www.fairchildsemi.com/ds/FQ%2FFQA12P20.pdf http://www.fairchildsemi.com/ds/FQ%2FFQA19N20C.pdf Attached are some plots and below is the tabular sim data: Thermal Design Details Heatsink type: Extrusion Part number: Extrusion: 9012 Weight: 5.26685 kg Heatsink dimensions: 309.96 mm wide x 304.8 mm long x 74.3 mm high Material: Aluminum Finish: B Environment Ambient Temperature: 25.0 C Altitude: 0.0 m Thermal Design Details Temperature Source Names %sc Power Tsink-avg Tsink-max Tcase Tjunction C C C C N2 0.3% 14.8 W 49.5 49.6 49.6 77.9 N1 0.3% 14.8 W 48.6 48.9 48.9 74.4 N3 0.3% 14.8 W 49.1 49.3 49.3 75.5 P2 0.3% 14.8 W 49.5 49.6 49.6 75.9 P1 0.3% 14.8 W 48.6 48.9 48.9 72.3 P3 0.3% 14.8 W 49.1 49.2 49.2 75.5 Quote Link to comment Share on other sites More sharing options...
Icarium Posted November 9, 2008 Report Share Posted November 9, 2008 Sweet I'm sure this will be awesome. Quote Link to comment Share on other sites More sharing options...
n_maher Posted November 9, 2008 Report Share Posted November 9, 2008 Are you sure you want to push them any harder? I mean seriously, how much of a space heater are you trying to create? Quote Link to comment Share on other sites More sharing options...
guzziguy Posted November 9, 2008 Report Share Posted November 9, 2008 These will be TWAs. Texas Winter Amps. Quote Link to comment Share on other sites More sharing options...
swt61 Posted November 10, 2008 Report Share Posted November 10, 2008 I'll be making solid wood face panels for these big boys. Maple with Pink Ivory heart shaped inlays. Marc did you want little Purple Heart daisy inlays as well? No extra charge. Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted November 12, 2008 Author Report Share Posted November 12, 2008 just bought some metal online. If anyone needs to buy from onlinemetals.com, let me know and I can send you a discount coupon as part of their refer a friend. It's an additional 5% off, which is added to their 5% discount for signing up and the 10% discount for material orders over $100. Anyways, here's what I got: Aluminum 6061-T6 Bare Extruded Square 0.375" Cut to: 11.8425" 8 @ $1.66 Aluminum 3003-H14 Perforated Sheet Round Hole 0.125" Thick (0.5" dia. holes) 0.6875" stagger Cut to: 12.0457" x 5" 4 @ $10.84 Aluminum 6061-T6 Bare Extruded Rectangle 0.375" x 2" Cut to: 4.25" 4 @ $2.55 Plastic Teflon Virgin NATURAL Extruded Round 0.8125" Cut to: 12" 1 @ $9.03 Plastic Acetal Black Round 1.375" Cut to: 12" 1 @ $9.29 Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted November 12, 2008 Author Report Share Posted November 12, 2008 oh, and before you ask what the last two items are for.... Quote Link to comment Share on other sites More sharing options...
JBLoudG20 Posted November 12, 2008 Report Share Posted November 12, 2008 Plastic Teflon Virgin NATURAL 1 @ $9.03 You dog. Quote Link to comment Share on other sites More sharing options...
swt61 Posted November 12, 2008 Report Share Posted November 12, 2008 Building your own sex toy belongs on another forum! Quote Link to comment Share on other sites More sharing options...
JBLoudG20 Posted November 12, 2008 Report Share Posted November 12, 2008 Building your own sex toy belongs on another forum! Aerius' forum. Quote Link to comment Share on other sites More sharing options...
Sherwood Posted November 13, 2008 Report Share Posted November 13, 2008 Which parts of the plastic virgin are teflon and which parts are natural? At least she'll be warm Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted November 13, 2008 Author Report Share Posted November 13, 2008 Which parts of the plastic virgin are teflon and which parts are natural? At least she'll be warm as long as the black Delrin rod doesn't get involved. Quote Link to comment Share on other sites More sharing options...
swt61 Posted November 13, 2008 Report Share Posted November 13, 2008 Cue Aerius, cue Aerius. Quote Link to comment Share on other sites More sharing options...
grawk Posted November 13, 2008 Report Share Posted November 13, 2008 cuckold jokes hit too close to home for aerius. Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted November 13, 2008 Author Report Share Posted November 13, 2008 so, does anyone need anything anodized black? I found a place to do it locally, but requires a minimum order of $100... Quote Link to comment Share on other sites More sharing options...
Pars Posted November 13, 2008 Report Share Posted November 13, 2008 so, does anyone need anything anodized black? I found a place to do it locally, but requires a minimum order of $100... Oooh... could in the future, but not right now. Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted November 20, 2008 Author Report Share Posted November 20, 2008 this is the general idea... the heat sinks totally dwarf that big Plitron Quote Link to comment Share on other sites More sharing options...
guzziguy Posted November 20, 2008 Report Share Posted November 20, 2008 Ah yes, the ghetto Halcro look. Very nice! Quote Link to comment Share on other sites More sharing options...
Dusty Chalk Posted November 20, 2008 Report Share Posted November 20, 2008 so, does anyone need anything anodized black? I found a place to do it locally, but requires a minimum order of $100...Yes. Quote Link to comment Share on other sites More sharing options...
guzziguy Posted November 20, 2008 Report Share Posted November 20, 2008 Yes. So you're the one that bought the chrome plated PS-1s. Quote Link to comment Share on other sites More sharing options...
Dusty Chalk Posted November 20, 2008 Report Share Posted November 20, 2008 No, I just want something -- possibly several somethings -- anodized black. Quote Link to comment Share on other sites More sharing options...
JBLoudG20 Posted November 20, 2008 Report Share Posted November 20, 2008 No, I just want something -- possibly several somethings -- anodized black. It would probably be a bad idea to anodize your penis. Just thought you might like to know. Quote Link to comment Share on other sites More sharing options...
n_maher Posted November 20, 2008 Report Share Posted November 20, 2008 this is the general idea... the heat sinks totally dwarf that big Plitron Heatsinks look undersized to me. Quote Link to comment Share on other sites More sharing options...
asebastian0 Posted November 20, 2008 Report Share Posted November 20, 2008 Those are some manly heatsinks! Curious as to what type of topology you are using for this amp... I have a ton of these devices and no set design yet. If you still have a referral to onlinemetals I could definitely use one for an upcoming copper sheet purchase. Quote Link to comment Share on other sites More sharing options...
swt61 Posted November 20, 2008 Report Share Posted November 20, 2008 Heatsinks look undersized to me. Yeah and John Holmes had a small pee pee. Quote Link to comment Share on other sites More sharing options...
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