Cooling fans
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Thanks to all for the input
When I build computers I also pay attention to the thermodynamics and air flow inside the case. The fan on the CPU is pulling air through the heat sink and away from the motherboard and the hot air is expelled out the back or top of the case and cold air is drawn in at the bottom front. I'm going to place them flat, up front right and back left to not cover the speaker. To fasten them I thought I'd use some very small pieces of double sided foam tape on each corner of each fan, just to keep them from sliding around. Thanks again. -- R. Kevin Stover ACØH K2/100 #4684 Reclaim Your Inbox! http://www.mozilla.org/products/thunderbird _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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Kevin;
You may not want to use foam tape. The heat's effect on the tape's glue should create quite a mess and eventually eliminate the stickiness of the tape. It would be interesting to know what other folks have done to keep the fans in place. On Oct 30, 2005, at 6:25 AM, R. Kevin Stover wrote: > I'm going to place them flat, up front right and back left to not > cover the speaker. To fasten them I thought I'd use some very small > pieces of double sided foam tape on each corner of each fan, just > to keep them from sliding around. > - Jack Brindle, W6FB ------------------------------------------------------------------------ --------------------- _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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When I was experimenting with a box fan on top of the KPA100 heat sink, I
simply affixed four soft plastic feet to the corners. The kind one finds at the hardware store to protect table tops, etc. They had enough traction to keep the fan in place on top of the fins without any other adhesive, even with the K2 elevated at an angle on the bail. Of course there was a small gap between the bottom of the fan and the fins, but I had the air blowing down onto the fins instead of up. I positioned the 3-inch fan a couple of inches from the forward edge, and there was no discernable flow from the top fan that far away to interfere with the air exiting the K2. I quit using it for two reasons: 1) I HATE the sound of fans blowing. It's one of the most obnoxious sounds I know. It's something that's almost not noticed while they're running, but it feels like someone just took a huge weight off of me when they finally shut up. Yes, that "whizzer" on the back of the K2/100 is real irritating to me <G>, but at least it goes off after a bit. 2) The fan wasn't needed, even after my longest, long-winded CW rag chew at 100 watts. Ron AC7AC _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by Jack Brindle
I use four "desk drawer bumper pads". They are sticky on one side to
mount to the fan, round and about 3/8" diameter with enough friction to keep the fan in place. Works for me. Tony W7GO Jack Brindle wrote: > It would be interesting to know what other folks have done to keep > the fans in place. > > _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by Jack Brindle
Jack Brindle wrote:
> Kevin; > > You may not want to use foam tape. The heat's effect on the tape's glue > should create quite a mess and eventually eliminate the stickiness of > the tape. It would be interesting to know what other folks have done to > keep the fans in place. I'm using a 3" fan on the right side of the heatsink (it's only needed there, right over the finals). Mine pulls air up. I put several diodes in series with the 12v supply to get a speed that would move enough air to be effective without making too much noise. With the fan, it just does not ever get very hot! I've been using double-sided tape for about a year with no problem. -- 73, Vic, K2VCO Fresno CA http://www.qsl.net/k2vco _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by ac0h
At 09:28 AM 10/30/2005, Jack Brindle wrote:
>It would be interesting to know what other >folks have done to keep the fans in place. I took two small rectangles of cardboard, punched a hole at one end, and secured them to the back of the K2 using the chassis screws. The 12V 3" fans are lashed together using cable zip-ties and are simply laid on top, blowing down. With the K2 tilted up (necessary for me) the fans slide down and rest against the cardboard stops. I suppose you could use metal stops for a more elegant look, but the two fans sitting on top make that seem pointless. Using the fans I can run full tilt RTTY without worry. cheers & 73 - jeff wk6i -- Jeff Stai [hidden email] Twisted Oak Winery http://www.twistedoak.com/ _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by ac0h
I don't have a K2 (yet), but I have a fair bit of experience with
trying to cool computer cabinets. You can get a wide variety of 'box' fans, that vary greatly in how much noise they make and how much air they draw. I'm very fond of the ones that Antec sells - they cost a little more, but have a very good airflow/noise ratio. One model that might be of interest to the K2 (and similar) users is the SmartCool line http://www.antec.com/us/productDetails.php?ProdID=75008 which has a builtin thermistor and varies the speed by the exhaust air temperature. They are also offering a variant that has the thermistor on a separate mount, so you could have it cool based on the temperature of the final output stage. 73 de chris K6DBG _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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