Build your own home made Antenna Analyzer with an arduino micro, or a cheeper one with a pic processor
A Half wave antenna has a high impedance feed point. This can be matched using a 1/4 wave stub matching section and converts the 40m vertical into an L-shaped 20m J-Pole antenna. The 300 ohm feeder used for this purpose must be kept away from the ground.
This wiki is intended to help identify radio signals through example sounds and waterfall images. Most signals are received and recorded using a software defined radio
The grounded half loop describe in this article is basically a half wave length wire on 80 Meters
Free CW morse code decoder software for Windows Vista sp2, 7, 8, 10. Decode CW signals with auto tracking features, auto detection of speed
Learn which are the top ten reason why you should operate in portable mode
List of differences between Yaesu FT 817 and FT 817 ND version
This page describes a successful antenna designed during 2014. It covers 4 HF bands 40/20/15/10m. A developed version of the old Windom idea, where the feed point is off centre.
An antenna system is electrically small if it’s enclosing sphere is <λ/2π. So a 10m band antenna of under 1.6m long qualifies.
Some observations on the Yaesu FT-817 5W portable HF VHF UHF transceiver with some pictures and movies