[Elecraft] My T1 is malfing. What do four yellow flashed mean?

My venerable T1 has suddenly taken ill. After many left button long presses, it finally goes into tuning mode. I tune. Some random time later it will drop out of tune as the yellow LED resumes its series of four flashes. Did a cosmic ray kill some critical flip flop in the CPU or is there a

Re: [Elecraft] Sherwood Receiver Tests

The K3 and K3S are dead ends --- they are frozen at their present capabilities. The K4 is a partially filled canvas that can improve over time. For example, the K4s I hear on the air still have, like the K3xs, that ugly popup in the unwanted sideband. They compare in this respect unfavorably with

Re: [Elecraft] The next generation KAT500

int page 2 of the article so chaos reigned. Moreover, my approach only works without modification for high impedance loads. In general, knowing the forward and reflected RF voltages is enough to match without iteration. I will be delighted to email the complete article and erratum upon request. Chuc

[Elecraft] Why predistortion?

*The Elecraft K-Line already produces some of the cleanest, puresttransmit signals around.* Au contraire! I'm in a morning roundtable where four use K3Ss --- all four have an unacceptable (only 32 dB down) popup on the opposite sideband on certain peaks. It has always puzzled me why Elecraft, so

[Elecraft] Measuring audio rms power

kn5l's question suggests another: How do you measure reliably audio rms power? (Say for EME Sun noise.) It turns out, the Windows program Daqarta work perfectly with either sound card audio or USB audio. Go to "Options," then "measure..." , then "dB." I believe the 30-day free trial, when

Re: [Elecraft] Automatic tuner implementation

quot; Mar/Apr issue. If these QEX issues are unavailable, feel free to write me for preprints. Chuck MacCluer, w8...@arrl.net On Mon, Apr 8, 2019 at 2:46 PM Chuck MacCluer wrote: > Finding a tuner solution need not be an iterative process --- there is a > simple two-step approach if you measure

Re: [Elecraft] Automatic tuner implementation

Finding a tuner solution need not be an iterative process --- there is a simple two-step approach if you measure the right parameter as you tune. See QEX, Nov/Dec 2016, p. 3. Chuck MacCluer w8mqw __ Elecraft mailing list Home: http

[Elecraft] An ideal amplifier for the KX2

I've just finished building up a superb amplifier kit from Victor and Yana at eb104.ru that uses phase-change cooling. It will output 750 clean SSB watts with 4.5 watts of drive once I replaced the 10-dB attenuator pad with a 4-dB pi pad, namely a shunt 220, a series 24, and a shunt 220. The