Ron, Many thanks for taking the time for a considered reply. Also to all the other respondents.
I've checked the power cable and connectors - all is seated correctly and firm. I'll just turn the wick down on my K3. This reflector is surely the bees knees! 73 de Paul Ron D'Eau Claire wrote: > > While a bad connection in the power certainly can cause this, it's worth > checking your power supply "crowbar" point. As you know, most power > supplies > have over-current protection (crowbar circuit) that shuts them down if the > current exceeds some preset level, even instantaneously. > > Some supplies, like my Astron, shut themselves down completely, requiring > me > to cycle the power switch on the Astron to restore power and alerting me > to > just what happened. But others don't. They just shut down for as long as > the > over-current condition occurs, so all you need do I push the K3 POWER > button > to restore operation. > > You are quite right that the current varies according to the SWR. It also > varies by band because the overall efficiency of the K3 varies slightly > over > the bands. I have an Astron 20 which is fine with the K3 but close to the > current limit on some bands making it more sensitive to absolutely low SWR > on some bands since it draws nearly 20 amps at 1:1 at 100 watts output. > > Another common issue is an improperly mating Anderson PowerPole connector. > It should require a solid "tug" to disconnect the power cable from the > rig, > indicating that the flat leaf spring contacts are mating fully. > > One cause of bad mating is that the contacts are not fully inserted into > the > connector housings. If they are, you cannot remove the contacts by pulling > on the wires. The contacts snap over an edge near the open end of the > connector when they are fully inserted. > > Of course that's true for the connectors on the back of the K3 too, but > those come pre-assembled and should be right. > > Ron AC7AC > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Jon K Hellan > Sent: Thursday, December 04, 2008 6:10 AM > To: G4AFU Paul > Cc: [email protected] > Subject: Re: [K3] [Elecraft] K3 power tripping out > > G4AFU Paul wrote: >> For some unknown reason my K3 (897) tripped out 3 times last night when >> on >> 160m cw. >> I was running 90w out with a 1 to 1 swr - auto ATU installed. >> Each time I brought it back to life by hitting the POWER button. >> >> It is a little disconcerting when in mid QSO! >> >> Has anyone else had this happen to them? > > This happens to me when SWR is a bit off, and also happened with my > previous > rig. I haven't measured, > but I suspect that it's pulling more current, making the power supply > voltage drop. I can usually > avoid the condition by turning power back a little - say to 70 or 80 W. > The > power supply is rated for > 25 A. > > 73 > Jon LA4RT > _______________________________________________ > > _______________________________________________ > 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 > > -- View this message in context: http://n2.nabble.com/K3-power-tripping-out-tp1613501p1617949.html Sent from the [K3] mailing list archive at Nabble.com. _______________________________________________ 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
