Well, I know that the transformer makes heat all by itself, but in the repeater cabinet, a fan is blowing directly on the back of the supply and I've never had anything get hot inside in over 5 years of operation (except for the MaxTrac exciter running at 6 watts, but the fan keeps it cool too).
I also load-tested the supply that's currently running, with a pair of 1 ohm resistors in parallel. They got really hot after several minutes while the supply itself stayed ice cold. I did discover that the supplies don't like being powered up with a 1/2 ohm load across the output. I only got 5V/10A; I presume that was a foldback of some kind. When I disconnected the load, everything went right back to 14V. With the supply running, the only thing that changed when I reconnected the load was the ammeter went from 0 to 28. The voltage at the output terminals only dropped a few dozen millivolts. Bob M. ====== --- skipp025 <[EMAIL PROTECTED]> wrote: > > "Bob M." <[EMAIL PROTECTED]> wrote: > > Someone else mentioned that 25A is the limit for > > continuous use. Yup, I'm not disagreeing. However > it > > should be capable of that load for hours at a > time. > > The heatsink temp will tell you the real story. > Astron Linear > Power Supply heatsinks are not "well sized". > s. ____________________________________________________________________________________ Get your own web address. Have a HUGE year through Yahoo! Small Business. http://smallbusiness.yahoo.com/domains/?p=BESTDEAL
