====== Century 22 Model 579 ======
{{579.jpg?150|}}{{579rear.jpg?190|}}

===== Description =====
Solid state CW only 50 watt input transceiver.  Operates on 80, 40, 30, 20, 15, and bottom 500 kHz of 10m band.  Full break-in CW, variable bandpass audio filter and offset tuning.

===== Reviews =====
  *[[http://www.arrl.org/members-only/prodrev/pdf/pr8505.pdf|ARRL]] (Must be an ARRL member and logged in to view.)
  *[[http://www.eham.net/reviews/detail/458|eHam]]

===== Manual =====
  *[[https://www.tentec.com/?p=1254|Download Operating Manual]] from Ten-Tec.

===== Mods =====
  *[[579audfilter|Audio Filter Mod]]
  *[[579audiotweeks|Audio Tweeks]] by G0KMC

===== Accessories =====
  *Power Supply Model [[979]]
  *Crystal Calibrator Model [[226]]
  *Electronic Keyer Board Model [[679]]
  *DC Circuit Breaker Model [[1179]]

===== Specifications =====
  ***Frequency Coverage:** 3.5 to 4.0, 7.0 to 7.5, 10.0 to 10.5, 14.0 to 14.5, 21.0 to 21.5, 28.0 to 28.5 Mhz, plus approximately 40 kHz overshoot at segment edges.
  ***Stability:** Less than 20 Hz change per degree Fahrenheit from 70 to 110 degrees after 30 minute warm-up.
  ***Tuning Rate:** Approximately 17 kHz per turn.
  ***Power Requirement:** 12 to 14 Vdc.  At 13.5 Vdc, 500 mA RX, 5 A maximum TX.
  ***Frequency Read-out Accuracy:** +/- 5 kHz, +/- 2 kHz using option crystal calibrator.
  ***Output Impedance:** 50 - 75 ohms, unbalanced.
  ***Receiver Sensitivity:** 0.05 uV for 10 dB S+N/N, typical.
  ***Receiver Selectivity:** 8 pole variable band-pass audio filter centered at 750 Hz.  200 Hz bandwidth, variable skirt attenuation.
  ***Receive Offset:** Adjustable +/- 2 kHz, zero at center detent.
  ***Audio Output:** 1 watt, 8 ohms, less than 2% distortion.
  ***Transmitter Power:** 50 watts input, nominal 20 watts output with SWR 2:1 or less, ALC limited.
  ***Semiconductors:** 28 transistors, 24 diodes, 7 IC's.
  *** Dimensions: HWD 4" x 10" x 10.5" (10.2 x 25.4 x 26.7 cm)
  ***Weight:** 6 lbs (2.7 kg)