Founded in the fourties, Heathkit was a well-known company in the sixties. They sold through their catalog a wide range of do-it-yourself electronic kits. Among them was some guitar amps, so they also proposed Harmony-made guitars. The buyer had to install the electronics in the instrument, but all woodworking and lutherie was done.
1968 was the last year with Harmony guitars proposed in Heathkit catalogs.

• TG-26 : Guitar based on the Harmony H17 (Silhouette Bobkat)
• TG-36 : Guitar based on the Harmony H56 (Rocket 2 pickups with vibrato)
• TG-46 : Guitar based on the Harmony H78 (3 pickups)

Amps (solid state)
• TA-27 (20 W combo)
• TA-16 (25 W combo) See schematic (gif)
• TA-17 (120 W head for guitar, bass, mic, phono) See schematic (gif)
• TA-38 Bass amp (120 W combo ca. 1969-1972) See brochure (pdf)
• TA-58 headphone amp for guitar
• TA-28 Fuzz pedal
• JK-37

Heathkit 1968 catalog pages (click to enlarge)

Heathkit 1967 advert (click to enlarge)

Heathkit 1970 catalog page (click to enlarge)

Heathkit 1966,1967 and 1970 catalog covers

TG-46 guitar (like harmony H78) and TA-16 amplifier

TG-46 (H78) and TG-36 (H56) from the 1968 Heathkit catalog

Links

• Harmony by Heath on Jim Calhoun's site
• Heathkit Museum