Re: [Elecraft] Sunspots!?!?

A contrarian view of cycle 25 was recently published which predicts a peak SSN twice that of cycle 24: The article has a link to the paper, it's worth reading. They

Re: [Elecraft] Audio controller/limiter

See the description of the CONFIG:AF LIM menu option on page 57 of the K3S manual. Bob NW8L On Fri, 21 Feb 2020, Mark Simms wrote: Is there a way to limit the audio output on the K3s to prevent sudden loud signals from causing hearing damage? This happens in CW contest operation and I've

Re: [Elecraft] K3S, VOX and WSJT-X?

What is your VOX gain setting? Bob NW8L On Wed, 29 Jan 2020, Frank O'Donnell wrote: Bob, First, let me back up and say that I'm operating with the K3S in transverter mode on 630m with an external power amp. I've successfully used CAT control with WSJT-X on a MacBook Pro to tx/rx JT9 and

Re: [Elecraft] K3 VFO-B knob replacement notes

Thank you for posting this! I recently inquired of Elecraft Support about replacing the VFO B knob on my older K3 (it is cracked). I was told to order E980275, but the person did not disclose all of the details you listed in your message, which are important. Fortunately I hadn't placed the

Re: [Elecraft] KAT500 follows K3 RX freq

Yes, I don't like the way the KAT500 follows RIT changes. Sometimes I cross a stored band slice boundary, the relays click and I know that if I transmit I'll be using the wrong tuning solution. I reported this as a bug back in 2014 [1] but I doubt it will ever get fixed. Bob NW8L [1]

Re: [Elecraft] April 6th GPS Reset

There is a warning on the TomTom site - and today I received an email from them regarding an older Garmin Etrex unit I own. It said in brief: === Due to the upcoming WNRO on 6 April 2019, the performance of your device will be impacted. While we no longer offer content and

Re: [Elecraft] Elecraft Digest, Vol 175, Issue 4

The solar zenith angle has a strong effect, so latitude matters. An interesting read from your home state: https://uvb.nrel.colostate.edu/UVB/publications/UV-Primer.pdf Bob NW8L (at 5300 ft asl, Sandoval County, NM, #37 in the ranking) On Tue, 6 Nov 2018, Dauer, Edward wrote: Interesting

Re: [Elecraft] searching for post by Wayne n6kr about counterpoise

Times change. In recent years vertically polarized man-made electrical noise has been a growing problem. I was forced to use a dedicated receive antenna to mitigate severe local noise problems (switching power supplies, plasma TVs etc.) from my surrounding neighbors. Because the only

Re: [Elecraft] OT - Source for Air Variable Capacitors

Yes, the stator-stator 15-120pF range applies to the mag loop butterfly configuration. stator-stator is equivalent to 2 stator-rotor capacitances (20-250pF) in series, approximately. Bob NW8L On Mon, 18 Jun 2018, Walter Underwood wrote: Here is a link to a butterfly capacitor at Radiohaus,

Re: [Elecraft] Off topic feedline question

Yes, googling "zip cord hf loss" yields the classic QST article: http://www.w1npp.org/events/2010/2010-f~1/antennas/wire/790303~1.PDF among others. Here are measurements made with a Rigexpert AA-600; http://owenduffy.net/blog/?p=327 Bob NW8L On Tue, 7 Nov 2017, Michael Blake wrote: The

Re: [Elecraft] K3S Noise reduction Test

Well, not exactly... the K3S doesn't have the ability to perform the phase shifting for noise cancellation. However, the K3 has antenna OUT and IN jacks which allow the use of the NCC-1 (now NCC-2) from DX Engineering to perform the noise cancellation. I've been doing this for years and it

Re: [Elecraft] K3 RF gain

The gain of the first IF amp. There's a detailed description of the K3's RF gain control on the Clifton Labs website, titled "Elecraft's K3 Transceiver and Manual Gain Control". Here's the link: http://www.cliftonlaboratories.com/elecraft_k3_and_manual_rf_gain_control.htm Bob NW8L On Mon, 6

Re: [Elecraft] KX2

Here's another aricle, by W8JI, on feeding the EFHW: http://www.w8ji.com/end-fed_1_2_wave_matching_system_end%20feed.htm Bob NW8L On Thu, 14 Jul 2016, Don Wilhelm wrote: Dave, All that is theoretical does not translate directly to the physical world. Take a look at