Don, W3FPR, will have suggestions. He must be away today, but he services K2's and K2/100's and has done so for many years. He is an invaluable resource on this reflector.
One question: Does it do the fault with the KPA100 removed? That will tell you which part of the K2 to start looking in. Ron AC7AC -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Steve Dyer Sent: Wednesday, April 04, 2012 12:03 PM To: [email protected] Subject: [Elecraft] [K2] Re: Was Working Fine... Then HiCur Any suggestions or areas I can investigate from anyone? 73, Steve ________________________________ From: Steve Dyer <[email protected]> To: [email protected] Sent: Tue, April 3, 2012 8:35:04 AM Subject: [Elecraft] Was Working Fine... Then HiCur K2 new/old build. S/N is 2338, built base K2 and KNB2 10 years ago, put away and only finished up recently with KPA100, KAT100 and KSB2. On air for couple weeks with good results. Suddenly starts giving intermittent HiCur messages yesterday. Tore out KPA100 and KSB2. -Occurs on all bands tested (40, 30, 20, 17, 12, 10) (no dummy load, but checked R with Rig Experts AA-54 and tested close to 50 ohm points with almost no Z). -Happens with Tune or keying at all power settings -Message displays at key-up when hand keying/tune, will happen quickly with keyer and then fold-back power. -Cal Cur is 3.5A -Measured power output with external wattmeter (SX-200) and power tracked fairly closely to setting -Will not happen if power is lowered to < -Checked power supply output voltage with DMM and it matches the K2 display voltage +.4V. PS is set to 14V. -Current draw on 40M @ 12W is 2.3A 13.1V (.5V drop), 17M @ 12W = 3.44A 12.9V (.7V drop) -On 40M Q7 Base is .611V Q8 is .612V -Completely disassembled and visually inspected all solder with magnifying glass and re-heated common transformers and chokes in final. Re-seated IOC and MCU (lifted slightly and pushed back into socket). -Checked T4 windings -Have done the DC voltage tests suggested in the various threads about HiCurr and everything looks normal. 73, Steve W1SRD ______________________________________________________________ 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 ______________________________________________________________ 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 ______________________________________________________________ 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
