Paul, look for voltage drop at the power poles. Solder or crimping is critical and proper assembly is as well. A fraction of an ohm will cause an unworkable voltage drop. Look at the internal volt meter on the K3 display to identify excess voltage drop at the connection. Willis 'Cookie' Cooke K5EWJ
________________________________ From: Paul Ormandy ZL4PW <zl...@orcon.net.nz> To: elecraft@mailman.qth.net Sent: Sat, January 1, 2011 11:22:39 PM Subject: [Elecraft] K3 losing RF Hi all, My K3 has developed a problem... Power output is down to 70W and the LCD back-light flickers on tx. The "Low Voltage" message flicked up briefly once. I suspect a DC power problem but so saying, the voltage at the rig is 13.9V on transmit at 70W and the rig is drawing 13A. The problem seems worse on the 6mb. If I reduce the output RF control to around 60W, there is no perceptible LCD flickering. I will obtain another 20A power supply tomorrow and see if the problem persists. In the mean time, (apart from running low power), can anyone suggest what I should start looking for internally? Kind regards, Paul -- Paul Ormandy ZL4PW ZM4M www.radiodx.com www.zl4pw.orcon.net.nz ______________________________________________________________ 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
