Chokes are not directional. Check your board for solder bridges and let us know what find. Since the board is mostly discreet parts, start looking at the battery connection and work your way into the circuitry. Is a part blackened, or very dark?
73, Bill K9YEQ ________________________________ From: elecraft-boun...@mailman.qth.net <elecraft-boun...@mailman.qth.net> on behalf of Tom Johnson <kq6d...@gmail.com> Sent: Thursday, March 14, 2019 8:34:47 PM To: elecraft@mailman.qth.net Subject: [Elecraft] K1 Power Supply Melt Down I just completed my K1 RF Board through to the DC Voltage Checks section. I plugged into a 12 V Battery Pack and did not get any smoke from the board when I turned on S1. But I did not get a voltage reading from pin 15 on P1. I did get a reading between 3.8 - 4.2 on P1 pin 16. I went back to trying to get a reading from P1 pin 15, and then noticed my battery pack (8 1.5 V AA) was bubbling and melting down - very HOT! Does anyone have any clues as to what went wrong? My only guess is if RFC1 (33 uH RF choke) and RFC4 (100 uH RF choke) are directional, I may have them reversed: I thought like resistors they are not directional. 73 -- Sent from: http://elecraft.365791.n2.nabble.com/ ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net 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:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
