Homebrew · Built by MARS members
Ham Radio Projects by MARS Members
Homebrewing is at the heart of amateur radio. Our members design, build and test their own station gear — from automatic band switching and digital VFOs to HF amplifiers and multiband beams — and share how they did it, so others can learn and build too.
Station automationArduino band decoder
Reads the transceiver's band data and switches antennas, filters and amplifiers automatically.
- 16 relay outputs
- OK1HRA-based firmware
- Built by VU2WJ
HF amplifierEVQ100 HF 40 m amplifier
A low-cost IRFP150N MOSFET linear that turns a QRP rig into a big 40 m signal.
- 90–130 W out
- 5–12 W drive
- 40 m LPF
HF antennaTaha Beam hexbeam
A six-band hexagonal beam for 20–6 m with Yagi-like gain, light enough for a TV rotator.
- 6 bands
- 50 Ω direct feed
- By VU2TAH
Digital VFODDS VFO (PIC16F877A + AD9851)
A full-featured digital VFO for homebrew rigs, with dual VFOs, memories, RIT and switched receive filters.
- 50 memories
- 1.5–30 MHz filters
- By VU2WJ
Built something worth sharing?
If you are a MARS member with a homebrew radio, antenna or station project, we would love to feature it here.