Bad regulated power supply. I use a MANSON EP-925 (also known with other brand names). This handles 25 amps easy with just a few 0.1 of voltage drop. After some successful mods it is stable within 0.05 V RX/TX 100 Watt at 13.80 Volt. (If interested see my mods at http://pa0fri.home.xs4all.nl/Diversen/EP925/ep925eng.htm)
Merry X-mass and a happy new year to you all. Twan - PA0KV K3 -1770 -------------------------------------------------------- Date: Mon, 24 Dec 2012 10:18:27 -0500 From: Ian Kahn - Ham<[email protected]> To:[email protected] Subject: Re: [Elecraft] New Output Power Issue Message-ID:<[email protected]> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Update on my low output issue: I ran the TX Gain Calibration this morning, and everything passed with flying colors. I am seeing about a 4-4.5V drop across the radio when going from rx to tx. Rx voltage sits at 13.8V, but when I transmit, voltage across the rig drops to between 9 and 9.5V. All tests performed while tuned into a 300W dummy load. Before I tear into my rig and start looking for corroded tin pins on the PA board (K3 #281, so unlikely the board was replaced/mod performed), is there anything else I should test while my station is still all together in one piece? Thanks to everyone for the assistance, and Merry Christmas! 73, --Ian Ian Kahn, KM4IK ______________________________________________________________ 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
