Is it possible that it 'belched' and the power reset is what really fixed it?
73, Rick WA6NHC Tiny iPhone keypad, spell check happens > On May 16, 2016, at 1:40 PM, Todd Ruby <[email protected]> wrote: > > Well Ron, I guess there's a first time for everything. Although the radio was > deaf and dumb, I had display function and it looked as it normally does after > turning on the power. There was just no receive nor output power. > > I turned it off, pressed the 20 amp circuit breaker on the rear panel and > sigs were coming through the headphones and I had full power. > > Today it's also operating perfectly. > > 73 > > Todd > >> On May 16, 2016, at 3:30 PM, Ron D'Eau Claire <[email protected]> wrote: >> >> Todd responded to me off the reflector that he lost all power to the K3 so >> it wasn’t the 20A breaker. That only controls power to the KPA3. The front >> panel is still powered and the receiver continues to work. >> >> I suggested it might be the self-resetting breaker inside the K3. That will >> turn it off completely. Actually power will still be on the KPA3 module and >> anything plugged into the 12V external power connector on the K3 rear panel, >> but the K3 itself will look dead with no front panel lights, receive or >> other functions until it cools and resets itself. >> >> I’ve never had an issue with either breaker opening unexpectedly. >> >> 73, Ron AC7AC >> >> From: [email protected] [mailto:[email protected]] >> Sent: Monday, May 16, 2016 12:18 PM >> To: Ron D'Eau Claire; 'todd ruby'; 'Elecraft Reflector Reflector' >> Subject: Re: [Elecraft] circuit breaker >> >> I believe Todd is referring to the breaker on the K3, not his house panel >> circuit? >> Ron has some good advice, but I wonder how common this circuit breaker >> operates? >> >> I looked thru my manual for more info on it. The block diagram shows it as >> a 25A fuse, >> text and device indicate 20A circuit breaker, but NO info on the type >> operating curve, or current vs. time for minimum trip? >> >> I have a 10A circuit breaker on my 40Ahr battery supply and it has never >> tripped. It is a thermal time delay like most house breakers. >> >> Anyone out there have any clue? Wayne? >> >> Mike AC5P >> >> >> >> On Monday, May 16, 2016 12:28 PM, Ron D'Eau Claire <[email protected]> wrote: >> >> >> The normal underlying cause for the breaker to open is over-current. That's >> a 20A breaker that protects only the KPA3 100 watt amplifier module. The >> first thing I'd do is check the current drain from your power supply on the >> band where you experienced the problem. First set the power to 10 watts so >> the KPA3 is bypassed and note the total current drain key down. Now crank up >> the power and see if the part used by the KPA3 is pushing 20A. For example, >> if your total current at 10 W was 3A, does the total at 100 watts approach >> 23A? IF so, the breaker was simply doing its job. Note that circuit breakers >> are not precision devices so it may trip a couple of amperes one way or the >> other from 20A. >> >> A primary reason for excessive KPA3 current is a high SWR on your antenna >> system. The higher the SWR, the less efficient the KPA3 becomes and the more >> current it has to draw to produce the power. >> >> A defective breaker can also start tripping at lower currents. >> >> 73, Ron AC7AC >> >> -----Original Message----- >> From: Elecraft [mailto:[email protected]] On Behalf Of todd >> ruby >> Sent: Monday, May 16, 2016 9:08 AM >> To: Elecraft Reflector Reflector >> Subject: [Elecraft] circuit breaker >> >> Would anyone venture to guess what would cause the circuit breaker to trip >> on a K3? Mine did all of a sudden yesterday. Fortunately, my friend >> suggested the reset and voila, I am back on the air. But if there is an >> underlying cause, I think it would be wise to be aware of it so as to >> preclude this episode from repeating. Any thoughts are welcome. >> >> 73 >> >> todd >> >> WB2ZAB >> >> ______________________________________________________________ >> 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 >> Message delivered to [email protected] >> > ______________________________________________________________ > 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 > Message delivered to [email protected] ______________________________________________________________ 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 Message delivered to [email protected]
