[Elecraft] An ode to K3 #2545--no useful info here

Due to my mobility issues, I have two stations set up in my house--one with a newer K3S, and one with my old buddy K3 #2545.  Number 2545 has been upgraded over the years several times, and about a year ago I sent her back to the mothership to get the full set of upgrades that became available

Re: [Elecraft] KPA-1500: Widely varying drive requirement - same frequency, different antenna

Based on my experience, the KPA1500 is very sensitive to small changes in load impedance (SWR) with respect to power gain and current. The ATU software is much better than it started out, but still sometimes doesn't get below 1.2:1. That could result in the kind of power gain variation Pete is

Re: [Elecraft] OT - Hot Air Soldering Guns for SMDs

Years ago QST had an article on calibrating and using a toaster oven and a multi-meter with a k-type probe for reflow soldering. I have been using that successfully for years, for about $35. 73, Byron N6NUL On Sun, Oct 20, 2019 at 5:16 PM Gwen Patton wrote: > > I was a backer for the ReflowR

[Elecraft] KX3 For Sale

I am selling my KX3 transceiver. KX3 KX3-K 160-6 M Transceiver KXAT3 Internal automatic antenna tuner KXBC3 Internal NiMH Charger/Clock KXFL3 KXFL3 Dual-Passband Roofing Filter KXPD3 KXPD3 Precision Keyer Paddle MH3 MH3 Hand Microphone KX3-PCKT Cable Kit KXUSBa USB Cable Power

Re: [Elecraft] KPA-1500: Widely varying drive requirement - same frequency, different antenna

Actually the fact that you were using the internal tuner doesn't change the chance that with the settings on the auto tuner don't tell you which direction the tuning of a certain antenna approach unity from. So there could be twice the variation allowed between the 2 antennas. So if one is coming

Re: [Elecraft] KPA-1500: Widely varying drive requirement - same frequency, different antenna

Thanks to everyone who replied, either directly or on the list.  I'm sorry, but I forgot to mention one key fact - I was running the amp's ATU with both of these antennas.  Assuming that the amp's power output measurement is done at the input of the ATU and not the output, and that the ATU

[Elecraft] KPA-1500: Widely varying drive requirement - same frequency, different antenna

I have two 40M antennas, a Carolina Windom and a full-wave parasitic sloper.  I have just noticed that on any given frequency, my K3 must deliver considerably more power on one than the other, in order for the amp to produce 1500 watts.  The difference is 27 watts on one vs 42 watts on the