Isivalo amplifier okanye i-tube amplifier luhlobo lwe-electronic amplifier esebenzisa iityhubhu ze-vacuum ukunyusa i-amplitude okanye amandla omqondiso.
Izandisi zevalvu zamandla ezisezantsi ukuya eziphakathi kumaza omoya angaphantsi kwee-microwaves ubukhulu becala zatshintshwa zazo lileyo ii-amplifiers ngeminyaka yee-1960 neye-1970.
I-valve amplifiers zisetyenziselwa izicelo ezifana guitar ii-amplifiers, ii-satellite transponders ezifana ne-DirecTV kunye ne-GPS, i-audiophile stereo amplifiers, izicelo zomkhosi (ezifana ne-radar) kunye ne-radio enamandla kakhulu kunye ne-UHF yosasazo lukamabonakude.
NdinguJoost Nusselder, umseki weNeaera kunye nomthengisi womxholo, utata, kwaye ndiyakuthanda ukuzama izixhobo ezitsha ngesiginkci entliziyweni yothando lwam, kunye neqela lam, ndisenza amanqaku eblogi anzulu ukusukela ngo-2020. ukunceda abafundi abathembekileyo ngokurekhoda kunye neengcebiso zesiginci.