This Heathkit HM-102 has been around since the early 1970’s. It has been a staple in many of amateur radio operators shacks. Furthermore, I purchased this HM-102 at a Mount Vernon Hamfest back in 2017.

Power and Weight

This particular model was made as a kit from the Heathkit company between 1970 to 1981. In addition, it covered the HF 1.8-30 mHz. Also features two power ranges at 200w or 2000w with SWR measurements. The SWR scale can measure 1:1 – 3:1 SWR. It is a small unit measuring 5-1/4 wide by 5-1/16 tall by 6-1/2 deep and weighing 2-1/2 pounds. The impedance sensor module, designed for 50Ω, also can be removed from the back of the cabinet and located externally closer to the antenna feedline.

Remote Mounting

Remote chassis assembly involves mounting the SO-239 coax connectors and metal standoffs to hold the circuit board. Mounting the circuit board and some simple wiring between the two coax connectors on the remote chassis. The five-wire cable is then passed through a hole in the remote chassis cover. Also, a Heyco strain relief is attached and the cover is assembled to the remote chassis up to 6 feet away.

My Thoughts

Overall the Heathkit HM-102 is a nice vintage piece of gear that measures RF and SWR (VSWR) of your amateur radio station. If you see one at a hamfest, pick it up! Most of these can be purchased used for around $25-$35 USD.

Here is a link to the Heathkit HM-102 assembly and operation manual for reference.