====== Hercules Model 444 Solid-State Linear Amplifier ======
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===== Description =====

Consists of two sections, amplifier and power supply.  The amplifier is styled to match the Ten-Tec Omni transceiver and contains all operating controls, meters and indicators.  Two 500 watt push-pull transistor amplifier modules operating at 45 volts DC provide typically 600 watts of rf output from the hybrid output combiner.  The power supply section is housed in a utility type enclosure and provides approximately 45 VDC @ 24 amperes.

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===== Specifications =====

  ***Band Coverage:** 1.8 - 2.0, 3.5 - 4.0, 7.0 - 7.3, 14.0 - 14.35, 21.0 - 21.45 MHz and provision for four user modified auxiliary bands.
  ***Maximum Power Input:** CW: 1000 watts; SSB: 1200 watts PEP.
  ***Driving Power Required:** 50 watts typical.
  ***Duty Cycle:** SSB: Continous voice modulation; CW/RTTY: 50% continuous (key down not to exceed 5 minutes).  Continuous carrier operation possible at reduced output.
  ***Third Order Distortion:** -35 dB from peak output at 1 kW input or 600 watts output, whichever come first.
  ***Output Impedance:** 50 Ohms unbalanced, maximum reflected power 75 watts. (SWR = 2.3 @ 500 watts output).
  ***Input Impedance:** 50 Ohms unbalanced.  Broad-band input requires no tuning. (SWR less than 2:1).
  ***Meter Functions:** 0 - 30 A collector current continuously metered.  Switch selected - 0 - 60 V collector voltage, 0 - 1000 watts forward power, 0 - 100 watts reverse power.
  ***Front Panel Controls:** Power - ON-OFF; Mode - Standby-Operate); Meter - Volts, Forward Power, Reverse Power; BAND - Remote, 1.8, 3.5, 7.0, Aux-1, 14.0, Aux-2, 21.0, Aux-3, Aux-4.

== Size and Weight ==

  ***Amplifier:** HWD 5.8" x 16" x 15.5"
  ***Power Supply:** HWD 7.4" x 15.7" x 13.5"
  ***Amplifier:** 22 lbs
  ***Power Supply:** 50 lbs

===== Reviews =====
  *[[http://www.eham.net/reviews/detail/4180|eHam]]