description Heathkit HM-102 Overview
The Heathkit HM-102 is a vintage electronic kit that combines an RF power meter with an SWR bridge for amateur-radio use. Its circuit measures forward RF power and standing-wave ratio on nominal 50-ohm transmission lines, helping an operator assess the match between a transmitter, feed line, and antenna. The unit was designed to be assembled and calibrated by the builder, and its manual also describes use as an in-line monitor during operation. It is most relevant to radio amateurs and collectors of historical test equipment.
[HM-102 manual](https://retronik.silicium.org/DOCUMENTS/Audiovideo/Heathkit/Heathkit-HM-102-Manual.pdf)
help Heathkit HM-102 FAQ
What does the Heathkit HM-102 measure?
The HM-102 is an HF RF power meter and SWR bridge for amateur radio operators. It measures forward transmitter power and helps identify standing-wave problems in an antenna system.
What frequency range does the Heathkit HM-102 cover?
Its specified frequency range is 1.8 to 30 MHz, covering the main HF amateur radio bands. This makes it suitable for HF transmitters rather than VHF equipment. [RadioMuseum](https://www.radiomuseum.org/r/heath_hm_102.html)
When was the Heathkit HM-102 sold?
Reference data places production between 1970 and 1981, with an initial listed price of about 35 US dollars. It was sold as a Heathkit project that the buyer assembled and tested.
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