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With fewer than 100 stores, far fewer than the aggressively expanding Radio Shack's thousands of local outlets, Lafayette Radio remained more of a dedicated enthusiasts' store than a mass marketer. The company was also hurt by the advent of electronics retailers relying on aggressive marketing techniques and competitive pricing in the late 1970s.
The Realistic DX-60 is a multiband radio. The radio receives 3 MHz to 27 MHz AM shortwave in three bands, 26.965 MHz through 27.405 MHz HF CB in one band, 540 kHz to 1620 kHz standard AM broadcast in one band, and 87 MHz to 108 MHz monaural standard broadcast FM. The DX-60 existed in two versions, model 12-764 and a nearly identical but ...
RadioShack (formerly written as Radio Shack) is an American electronics retailer that was established in 1921 as an amateur radio mail-order business. Its original parent company, Radio Shack Corporation, was purchased by Tandy Corporation in 1962, shifting its focus from radio equipment to hobbyist electronic components sold in retail stores.
A radio-frequency power amplifier (RF power amplifier) is a type of electronic amplifier that converts a low-power radio-frequency (RF) signal into a higher-power signal. [1] Typically, RF power amplifiers are used in the final stage of a radio transmitter , their output driving the antenna .
250 V a 250 V g2 I a = 48 mA R k = 135 Ω: 170 V a 170 V g2 I a = 70 mA-12.5 V g1: Maximum Output Power (single-ended Class A) 5.7 W @10% THD into 5200 Ω, 250 V supply, 4.3 V RMS input 5.3 W @10% THD into 2500 Ω, 200 V supply, 7.0 V RMS input Maximum Output Power (2 tubes, push-pull Class AB) 17 W @4% THD into 4+4 kΩ, 300 V supply, 10 V RMS ...
Magnetic amplifiers are still used in some arc welders. Small magnetic amplifiers were used for radio tuning indicators, control of small motor and cooling fan speed, control of battery chargers. Magnetic amplifiers were used extensively as the switching element in early switched-mode power supplies, [5] as well as in lighting control.
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