My specs: 250 watts out 10 watts drive 64 volts 8.5 amps 240 V line Temp has got up to 52c @ 300 watts. Haven't seen any warnings, but the fan kicks in more often as expected. I'm uneasy running it at 500 watts during a contest.
Joe Hutchens ( AJ8MH ) http://webpages.charter.net/aj8mh-radio/ On Sun, Sep 30, 2012 at 11:15 AM, Brian Alsop wrote: > Dwight. > > Something is wrong. Mine at 400-500 watts gets to about 65C during > bunches of RTTY CQ's. It probably can go higher. Fan kicks in at > expected values. 240v line. > > 73 de Brian/K3KO > > On 9/30/2012 14:53, DGB wrote: >> Am running my fairly new kpa-500 in the rtty contest. It is situated >> out >> in the open. >> >> it from 220v and during the run it's current runs at 10a and 64-74v. >> The >> temp starts at 35c and as I run it slowly creeps up to 55-57c and >> kicks >> out with the error message of "Pwr In High". >> >> I'm only driving this with a K-3 set at about 13w to drive the amp to >> 350 watts. I wanted to take it easy on the amp and seems from the >> specs >> that it should handle that. The amp. seems to be real sensitive to >> the >> driving power of just a watt difference from the K-3. The power >> varies >> at the amp from 250-350 watts when running and not fiddling with the >> K-3 >> power knob. I have the fan set on 1 and didn't make any difference if >> I >> set it to 6, it still would kick out in due time, just slightly >> longer. >> Must mention it does it whether it's into a resonant antenna or a >> dummy >> load. The temps just slowly climb. >> >> Anyone have a similar problem, makes it useless for rtty contesting >> and >> running. No problems in CW contests at full bore! >> >> 73 Dwight NS9I. >> > > > ----- > No virus found in this message. > Checked by AVG - www.avg.com > Version: 2012.0.2221 / Virus Database: 2441/5300 - Release Date: > 09/30/12 > > ______________________________________________________________ > 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 ______________________________________________________________ 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
