Re: [Elecraft] KPA3 misbehaving

Steve; I believe you have the same problem I had a few years ago on my K3 s/n 732.  It turns out that the current sensor IC, U6 on the KPAIO3 board was toast.  When you go above 12W this sensor measures the current to the KPA3.    There is also the same sensor (U1) on the RF board which is

Re: [Elecraft] K3/10 low power output, fails TX calibration?

Hi Ross; This looks exactly like the problem that I just recently experienced on #732. It turns out that one of the output FETS (Q5) in my LPA developed a gate to source short. Check the gate to ground resistance on each device which should be 1K-4K ohms. You should contact gary @ elecraft

[Elecraft] Fw: The use of a doublet

You can go straight to www.W2DU.com to get thePDF's. Russ, N3CO - Forwarded Message From: Joe Planisky jp...@jeffnet.org To: Elecraft Reflector Elecraft@mailman.qth.net Sent: Wednesday, July 15, 2009 10:28:32 PM Subject: Re: [Elecraft] The use of a doublet For those who might be a