George, That 145 degF temperature is 62.8 degC. While that is high, it is not so high to create any damage. Your shack temperature is much higher than what is considered "normal ambient", so that is a contributing factor.
The auxiliary cooling with your high ambient temperature is a good thing. 115 degF is 46.1 degC. In "normal" situations with an ambient temperature of 23 degC, the internal fan will do its job nicely and will usually keep the heatsink temperature below 60 degC. If the CAL tpa parameter is set properly, the fan will go to high speed at 40 degC (104 degF) and remain on high until the temperature drops to 37 degC (98,6 degF). In most cases, the "hold" temperature rule applies. If you can hold your hand on it with only minor discomfort, all is OK, but if you cannot hold your hand on it for more than 2 minutes, it is hotter than normal. We are experiencing some hotter than normal temperatures over much of the NA continent, so be safe and stay cool. Temperatures in excess of 100 degF are expected here in North Carolina for the next 2 days, with heat indexes in excess of 115 degF - going outside is like stepping into a sauna bath. Anyone disagree with global climate change? 73, Don W3FPR On 7/22/2011 10:33 PM, [email protected] wrote: > Put a thermometer in the middle of the heatsink on my rig. On long CW > xmissions I see temps as high as 145 Degrees F. Shack temp is 85F. I have the > fan set to run on high all the time. Is this normal. I laid another small > fan on the heatsink and the temp stayed below 115F. Has anyone added more > cooling to their K2? 73 George/W2BPI > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
