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| - | ====== Century 21 Digital Model 574 ====== | ||
| - | {{574.jpg?150|}} | ||
| - | ===== Description ===== | ||
| - | Medium power solid state cw transceiver covering 80 - 10 meters. Double direct conversion receiver. Built-in AC power supply. | ||
| - | |||
| - | ===== Reviews ===== | ||
| - | *[[http://www.eham.net/reviews/detail/503|eHam]] | ||
| - | |||
| - | ===== Accessories ===== | ||
| - | *Keyer Model [[670]] | ||
| - | *Calibrator Model [[276]] | ||
| - | *Crystal for 28.5 - 29.0 MHz Model [[273]] | ||
| - | *DC Circuit Breaker Model [[1170]] | ||
| - | |||
| - | ===== Specifications ===== | ||
| - | ==== General ==== | ||
| - | ***Frequency Coverage:** 3.5 to 4.0; 7.0 to 7.5; 14.0 to 14.5; 21.0 to 21.5; 28.0 to 28.5; 28.5 to 29.0 MHz. (Crystal not supplied for 28.5 to 29.0 MHz, but available as accessory, Model [[273]].) | ||
| - | ***VFO Frequency Stability:** less than 20 Hz change per degree Fahrenheit, averaged over a 40<sup>o</sup> change from 70<sup>o</sup> to 110<sup>o</sup>, after 30 minute warmup. Less than 20 Hz change from 105 to 125 VAC line voltage. | ||
| - | ***Direct Frequency Readout:** 5 red LED digits, 0.3" high, accurate to nearest 1 kHz. | ||
| - | ***Tuning Rate:** Approximately 17 kHz per revolution of main tuning knob. | ||
| - | ***Power Requirements:** 105 - 125 VAC, 50-60 Hz. 10 watts receive, 100 watts transmit. | ||
| - | ***Construction:** Rigid aluminum chassis and sub-panels. Aluminum case. Grey front panel, black textured vinyl cover. | ||
| - | ***Dimensions:** HWD 6.125" x 12.5" x 12" | ||
| - | ***Weight:** 15.5 lbs | ||
| - | |||
| - | ==== Receiver ==== | ||
| - | ***Sensitivity:** 1 uV or less for 10 dB S+N/N. | ||
| - | ***Selectivity:** Three position; 0.5, 1.0, and 2.5 kHz. | ||
| - | ***VFO Frequency:** 5.0 to 5.5 MHz. Double Direct Conversion. | ||
| - | ***Antenna Input:** 50 ohms, unbalanced. | ||
| - | ***Audio Output:** 1 watt @ 8 ohms, less than 2% harmonic distortion. Built-in speaker; PHONES jack. | ||
| - | ***Offset Tuning:** Approximately +/- 5 kHz, defeatable with ZERO BEAT switch. | ||
| - | |||
| - | ==== Transmitter ==== | ||
| - | ***DC Input Power:** 70 watts | ||
| - | ***RF Output Power:** 25-30 watts, typical. | ||
| - | ***Output Impedance:** 50 - 75 ohms, unbalanced. | ||
| - | ***T/R Switching:** Full break-in cw with PIN diode switch. | ||
