Fabricantes
- Hafler
- Hagenuk
- Haier
- Hallicrafters Co.
- Hallikainen and Friends
- Hameg
- Hammond
- handic
- 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
- H H Scott
- 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
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The Model 420LA is a general purpose broadband amplifier capable of more than 20 watts of linear power output when driven by any laboratory signal o
