Jim, The first thing to check in a situation like yours is the DC path from the power supply and inside the supply itself. The entire DC path must have a very very low series resistance - if it does not, the voltage will sag drastically under load and the K2 will shut down due to the instantaneous low voltage that results.
This may or may not be your particular problem, but the first order of business is to be certain that all the 'stuff' (including connection points inside the supply) have tight or well soldered connections and are truly capable of handling 20 amps of current when the current demand changes from milliamps to something like 17 amps - a slightly loose bolted connection could cause the conditions that you are reporting. After determining that the DC current path is intact and capable of handling the proper current, then you can look to potential RFI considerations. 73, Don W3FPR > -----Original Message----- > > I am in the testing phase of my KPA-100 construction using an Astron 20A > power supply. When I attempt to adjust the power of the K2 in > Tune mode it > will reset at levels between 40-90W depending on the band > selected. I tried > adjusting the power using a battery and I was successful to 100W without > having a reset. Therefore the problem points to the Astron. Tech Support > mentioned to me that this is a problem that has happened a number > of times. > > I have tried ferrite beads on the DC lines, a capacitor across > the '+' & '-' > leads and verifying that the '-' lead is connected to the case (a > solution > that I found on the web). Nothing has helped. > > I haven't found anything on the discussion list addressing this > issue. Has > anyone had this problem ? > > TNX & 73, Jim > > > _______________________________________________ > Elecraft mailing list > Post to: Elecraft@mailman.qth.net > 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 > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.1.371 / Virus Database: 267.13.12/193 - Release Date: 12/6/2005 > > _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net 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
