Рет қаралды 777
Testing the bands on a rebuilt Hallicrafters S-40B shortwave receiver. This radio is tube type. A Preppers dream. Many of these appear in post war movies. The S-40B was a very popular radio back in 1950, sold for $90
The S-40B is a single conversion general coverage receiver covering 4 bands from AM broadcast to 44 MHz. It is a minor upgrade of the S-40 and S-40A with one less tube but all the same functions. All of these sets feature electrical bandspread, BFO, an RF amp and two stages of IF amplification. The S-40 and S-40A use a type 80 tube rectifier and a 6F6 audio output tube. The S-40B uses a 5Y3GT and a 6K6GT for those functions. Other tubes in this set are 6SG7 as RF amp, 6SA7 converter, two 6SK7 for IF amps, 6SC7 for BFO and first audio, and 6H6 for detector, AGC, and noise limiter.