I do briefly see a high current message - forgot to mention tha. Don Wilhelm-4 wrote: > > Bill, > > Since it misbehaves with the dummy load, you will most likely find the > problem in the base K2 160 meter Low Pass Filter. > I am surprised that you do not also see Hi Curr messages. > > 73, > Don W3FPR > > NZ0T wrote: >> Thanks Don, >> >> The rig behaves the same into the dummy load in all configurations with >> or >> without the KAT100 in line, with or without the mike or paddles >> connected, >> with or without attached and I even tried a different coax jumper. 160 >> is >> the only band it occurs on. What is confounding me is that it workrd >> fine >> at home but not here with the exact same configuration. >> >> >> >> Don Wilhelm-4 wrote: >> >>> Bill, >>> >>> What does that K2 do when working into a dummy load? If it still fails, >>> the problem is definitely with the K2. If it behaves, then you need to >>> look at your antenna system - you may be better off with a 1:1 choke >>> balun than your 4-1 balun. I really don't know why hams persist in >>> using a 4-1 balun when driving ladder wire feeders - the 450 ohms is >>> only the characteristic impedance of the line and that says nothing >>> about the feedpoint impedance - the ladder line acts as a transmission >>> line transformer. Measure the feedpoint impedance of the 450 ohm line >>> with an antenna analyzer (operate it on batteries) where you connect the >>> balun. If the impedance is high, then use the 4-1 balun, but if it is >>> low a 1-1 choke balun will be a better choice. Which balun is better >>> depends on the electrical length of your feedline. >>> >>> The K2 can behave differently in the presence of RF-in-the-shack than >>> your 706, so that is not a fair comparison. Look at what you have >>> connected to the K2 and ask what is different - the routing of the >>> paddle cable? How is the power supply cable routed? Do you have a >>> microphone connected? Have you grounded the microphone jack shell on >>> that K2? >>> >>> If you have a K2 problem, ask again with details of the failure with a >>> dummy load. Get it working with a dummy load before adding the extra >>> element of the antenna into the problem. All we can say right now is >>> that your problem is either with the antenna, power supply, any cable >>> attached to the K2 or the K3 itself. Which one is pure guesswork until >>> you reduce the number of variables. >>> >>> 73, >>> Don W3FPR >>> >>> NZ0T wrote: >>> >>>> Now that I have my K3 at home I moved my K2/100/KAT100 to our lake >>>> cabin. >>>> Last weekend it started to shut down on 160 only when transmitting over >>>> about 70 watts. All other bands are fine, the antenna (160M dipole fed >>>> with >>>> ladder line thru 4-1 balun and about 6' of coax into the cabin) is fine >>>> and >>>> the ground seems fine. It was shutting down the MFJ 4125 switching >>>> power >>>> supply so thinking maybe RF was getting into the supply I took the rig >>>> home >>>> and it worked just fine there. Brought it back this weekend with an >>>> Astron >>>> linear supply and while that PS is not shutting down the rig still >>>> wants >>>> to. >>>> I have used this same setup before here with no problems and this >>>> started >>>> happening suddenly last weekend. I tried the rig without the KAT100 >>>> thru >>>> a >>>> manual tuner and it still wants to shut down. My Icom 706 works fine >>>> on >>>> 160 >>>> with the same configuration. >>>> Ideas? >>>> >>>> 73, >>>> >>>> Bill NZ0T >>>> >>>> >> > _______________________________________________ > 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 > >
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