The musical instrument pickups, effects units and amplifiers designed and manufactured
by Harry DeArmond and Bud Rowe and later by Steve Tosh in Toledo, Ohio, from the 1940s to the 1980s, through Rowe Industries Inc.,
H. N. Rowe & Company, Rowe DeArmond Inc., DeArmond Inc. and Tosh Electronics, all of Toledo, Ohio, USA.


 The Heath Company, based in Benton Harbor, Michigan, was established in 1912.  They produced a wide range of electrical, audio and electronic products.  In 1947, they produced their first kit, an oscilloscope.  The Heathkit range gradually expanded to include Hi-Fi audio gear, televisions, test equipment, amateur radios, and computers.

In the 1960s, they also produced kits for electric guitar amplifiers and electric guitars.  The guitars are standard Harmony models, rebanded as Heath.  The Harmony H78 guitar kit was marketed as the Model TG-48, The H56 Harmony Rocket with vibrato was marketed as the T-36 and the H17 Harmony Silhouette Bobkat was marketed as the Model TG-26.