10x Scope Probes: Teledyne LeCroy

Here is a short application note that covers 10x oscilliscope probes.

Teledyne LeCroy 10x Probe Application Note

A pdf version is also available.

A Brief History of The Development of Classical Electrodynamics

A Brief History of The Development of Classical Electrodynamics
By Professor Steven Errede

A Brief History of Electromagnetism

ADIF Tools from NS6T

ADIF Tools from NS6T

Make a Contact Map from an ADIF File
Logbook of the World ADIF filter

https://ns6t.net/azimuth/adiftools.html

Vertical Antennas, Radial Length and Number of Radials by Rudy Severns, N6LF

Here is a very good article written by Rudy Severns, N6LF.
http://www.antennasbyn6lf.com/files/radiation_resistance_variation_with_radial_system_design.pdf

It answers many questions hams have about vertical antennas and how the number of and length of radials influence the radation resistance of vertical antennas made for the 40 M band.

Ground resistance soil conditions are also taken into account and  discussed.

NEC models are used.

3_D Printer PCB Jig/Vice

Print a PCB vice with 3-D printer

https://www.thingiverse.com/thing:21357/#files

Yaesu FT-891 to FLDIGI by KD9CJX

How to setup the Yaesu FT-891 to FLDIGI by KD9CJX

https://kd9cjx.wordpress.com/2017/11/22/how-to-setup-the-yaesu-ft-891-to-fldigi/

FT-8 Operating Guide by Gary Hinson ZL2iFB

FT8 operating guide

Work the world on HF using the new digital mode
by Gary Hinson ZL2iFB

http://www.g4ifb.com/FT8_Hinson_tips_for_HF_DXers.pdf