Re: FW: [Elecraft] K1 Battery Question

Hi Dan: As I wrote the reply, I was thinking that 40% duty cycle was way too high, because, as you say, there's lots of dead time even while transmitting, but I figured the example would show John how to go about estimating the life of his battery using his own guesses. There are lots of

[Elecraft] loops

I love loops. They're quiet, have lots of capture area, wide bandwidth, and when big enough, don't have the big horizontal spikes that collinears or other horizontal wire antennas have. But here's my question: Does anybody know whether the stup on Radio Works's superloop is open or

[Elecraft] Batteryt Life

I have posted how to calculate battery life here before. John gave a pretty good reply, but there are a couple of other points that should be made. 1. A lead acid battery is rated assuming the current is drawn at the 20 hour rate. If you draw more current than this, you will get less capacity

[Elecraft] Featherweight Yagi Design Questions

My summer project besides upgrading my K2-100 with the latest modes and maybe DSP, I'm thinking about the possibilities of building a 3-element, 20-meter monoband yagi with the design emphasis on light weight to enable use of a 40-ft steel, telescoping, TV-type mast and rotor which I can

[Elecraft] field operating tip: paperless logging in a pinch

Suppose you're operating in the field, or mobile, and don't have a log book or writing instrument. You then snag a new state or country and want to remember the call, etc. What to do? This happened to me today while walking around with my KX1. I worked AA5AE in New Mexico using 1.5 watts and

[Elecraft] PLL linearization

Hi Gary, PLL linearization is completed in this morning after removing and re-soldering PLL reference oscillator temperature compensation PCB and U4. When I do the PLL range test pressing BAND- then BAND+ the voltage at pin 1 of U6 were 5.1mV and 7.67V (OK). RFC15 show 8.2 Ohms of resistance