Manufacturers:
- H H Scott
- Hafler
- Hagenuk
- Haier
- Hallicrafters Co.
- Hallikainen and Friends
- Hameg
- Hammond
- Hansen Electric Laboratory and Works
- Hantarex Electronic Systems
- harman kardon
- Hartmann und Braun
- Harvey-Wells Electronic
- Hasselblad
- HDW-Elektronik
- Heat Controller
- Heathkit
- Henry Radio
- Hewlett Packard
- HGL
- Hickok Electrical Instrument Company
- Hioki Electric Co.
- Hisense
- Hitachi
- Hohner
- Holaday Industries Inc.
- Honda
- Honeywell
- Hoover
- Hotpoint
- Hotz und Gerber
- HTC
- Hualing
- Hughes Products
- Humax
- Hung Chang
- Hunter Manufacturing Company
- Huntron Instruments
- Hunts
- Hustler
- Hy-Gain Electronics
