A compact 3 element Yagi for 2m

My friend Richard found himself located on the margins of coverage of the local 2m repeater where multi path reception was the main problem, a but a little lift in signal would also help. This begs a small Yagi solution. Last update: 23rd October, 2016, 10:20 AM

End fed wires – another matching case study

A reader of my article End fed wires – new hams love ‘em asked about the performance of the matching transformer described at (Osborne 2014). (Osborne 2014) gives the transformer design above using a FT82-43 ferrite toroid with three turns on the primary. The concept is to adjust the antenna length and C1 for a … Continue reading End fed wires – another matching case study

A simple preamp for dynamic capsules to suit radios using electret microphones

A lot of radios are made today to use an electret microphone which has a higher output than common dynamic capsules and may require a preamp to comfortably obtain sufficient audio. This article describes a microphone + preamp intended as a drop in replacement for an electret capsule. An electret capsule contains an integral FET … Continue reading A simple preamp for dynamic capsules to suit radios using electret microphones