Johnson's Techworld

My Yaesu FT-710 is a compact, high-performance SDR (Software Defined Radio) covering the HF and 50MHz bands. FT-710 is widely recognized for inheriting the advanced RF technology used

A Moxon-Yagi is a highly effective, compact choice for LEO (Low Earth Orbit) satellite operations, particularly for handheld use. By combining the wide beamwidth and excellent front-to-back (F/B)

If you have another HF radio or a cheap RTL-SDR dongle, you can verify the Si5351 is actually oscillating.

A Double Bazooka antenna is a specialized type of broadband dipole antenna designed specifically for amateur radio. It is constructed using a combination of coaxial cable and standard

A folded dipole antenna is a variation of the standard half-wave dipole that consists of two parallel conductors connected at both ends, forming a continuous loop. One of

Recently we have been hearing a lot about various types of fuel gases like CNG, PNG, LNG and LPG. Many would wonder what all these really mean and

In modern radio equipment, a rotary encoder is the digital successor to the old-fashioned tuning capacitor. While it looks like a standard volume knob, it functions as an

I was planning to use a refurbished desktop computer for my homebrew LMR SDR 1.1. But that computer became out of order and could not be recovered in

A gamma match is a popular method used to feed an unbalanced transmission line (like 50-ohm coaxial cable) into a balanced antenna element (like a dipole or the

Working with amateur radio satellites introduces a unique set of challenges compared to terrestrial communication. While you can use simple vertical or horizontal antennas, circular polarization (CP) is