On Fri, Jan 14, 2005 at 08:57:08PM -0600, Joe Ford wrote: > Hello Elecrafters, I have a little problem and would appreciate some > advice. > > My ham shack is in a room which is separated from the main house. > Consequently, it does not receive heat from the main house and during > this cold weather is only heated when I am in the room and even then I > don't get it very warm. I normally only have an hour or so in the > evenings for operating. I dress warm, and, fortunately I'm in Alabama > where winters are relatively mild. > > Well I have almost completed construction of the KPA100 and planned to > power it with an Alinco switching supply. I was using this supply with > my K2 on a cold morning recently and almost as soon as I powered up it > notified me my battery was low (not on battery). I looked at the > Alinco's meter and the voltage was showing just over 10V when it should > have been 13.8. > > First question: Am I correct in attributing this drop in voltage to the > cold? I think it was about 45 degrees in the room at that time. I also > have an Astron RS-20 which did not show a similar voltage drop, leading > me to this conclusion. I can use the Astron to power the KPA100 but will > need another supply for the K2. Second question: Can someone suggest a > smaller supply to use with the K2 which will not suffer in the cold > (most of the small ones seem to be switchers)? Or, final question, Is it > really necessary to use separate supplies for the K2 and KPA or > could/would the Astron power both. > > Thanks in advance for any assistance.
My shack is in my unheated garage, which often gets to <50F this time of year. I use an Alinco supply for my K2, TS-570 (not at the same time) and packet station and have never had any problems with the voltage being temperature sensitive. I keep the voltage control on the detent. Bob, N7XY _______________________________________________ Elecraft mailing list Post to: [email protected] 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
