Johnson's Techworld

Most radio amateurs will be familiar with Gamma match for Yagi antennas and some will be familiar with Beta and Delta matches as well. We will review all

As part of troubleshooting the low output from the pre-amplifier board, I opened up the PTT mic to see the connections inside. It seems to be a dynamic

As the RF output from my homebrew Easy BITX was quite low, I wanted to try adding an audio pre-amplifier to see whether it will increase the SSB

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