At 07:20 PM 2011-01-07, Don Wilhelm wrote: >It should not get that hot that fast. >Do you have the fan installed the right way around? >Is the fan running?
Its pulling air up from the bottom, and blowing air up. It comes out the holes above the attenuator resistors. > Is the bias for the power module correct? - your DMM may read > 0.02 volts or 0.020 volts depending on the number of digits it displays. It was running way hot at a bias of 0.0200, and I slightly increased it and subsequently got more output and less heat. The manual said to look for 3-5V on VGG, and I'm only seeing about 2.25 (at bias 0.02) and 2.4 at my current bias level. The current consumption is less than 4A at about 13.6V. I should mention am running it continuous (1min on/off) (not SSB) as I do a lot of digital work. >On 1/7/2011 6:25 PM, Colin VE3MSC wrote: >>I've built up all 3 XVs, and find the 432 the hottest of the bunch. >>What are you doing to manage the heat ? My output power drops and >>the case hits over 60C / 140F if I run for a minute at about >>10W. (Attenuator not a factor as driving at low level). >>VE3MSC Colin ______________________________________________________________ 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
