Note
HG-10 1961-1968 $37.95
HG-10B 1968-1976 $37.95
The HG-10 was released in 1961 just a few months after the DX-60. Designed specifically as a matching accessory for the DX-60, the HG-10 is calibrated to cover 80-2 meters but will provide drive on 220 MHz and 440 MHz as well, though use at frequencies above 6 meters would be problematic due to the effects of drift in the VFO.
The HG-10 and 10B use two tubes, a series-tuned Clapp oscillator and a cathode-follower isolation stage, and will provide 5 volts RMS output to an open circuit.
The VFO is designed for transmitters using grid-block keying (like the DX-60 series) and most transmitters using cathode keying (like the DX-40).
Features include a 28:1 dial drive turns ratio, a “spot” switch for off-the-air tuning, and an illuminated dial window. Front panel controls include off/spot/operate, frequency, and band.
Rear panel connections include an RCA RF output jack, a 1/4 inch jack for a key, and a cable for B+ and filament power. The HG-10(B) takes its power directly from the DX-60, 60A and 60B, or HW-16. Caution: Most HG-10s you find have been wired specifically for the DX-60, however, it is possible for it to have been used with other transmitters, so before you plug it in, make sure you know where it’s been.
The manual details changes that are needed to make it work with non-Heath transmitters. Differences between HG-10 and the 10B (there was no A version) are purely cosmetic. For example both versions are two-tone green, but the smooth finish of the 10 was replaced with a wrinkle finish on the 10B. And on the B version the knobs are a darker shade of green.
Photos, general information and specifications from "Heathkit: A Guide to the Amateur Radio Products," by Chuck Penson, WA7ZZE. Used with permission.