Amplifiers

 

Westinghouse AC 2-stage Amplifier 1922	Burns &Dudgon Amplifier (British)	Radiola Balanced Amplifier 1923 Radiola 1400A Amplifier 1923
Western Electric 7A Amplifier 1922	Edison Bell Note Magnifier (British) c. 1923	Fellophone 2-Valve Amplifier (British) 1922
Fellophone 2-Valve Amplifier (British) Radiophone Amplifier 1922-1923	HPR Wireless Ltd. Simplex Amplifier (British) 1922 Marconiphone Headphone Distributor (British) 1925	Brown Microphone Amplifier - closed (British) 1923 Brown Microphone Amplifier - Open (British) 1923
	Magnavox AC3-C 3-stage Power Amplifier 1923