Henry Radio 3K Classic Mark II, X Mark II, 5K Classic Linear Amplifier Operating and Maintenance Manual

Below you will find brief information for Linear Amplifier 3K Classic Mark II, Linear Amplifier 3K Classic X Mark II, Linear Amplifier 5K Classic. These are high quality console model one-stage linear RF amplifiers designed around the rugged economical Eimac 3CX1200A7 ceramic triode.

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Henry Radio 3K Classic Mark II, 3K Classic X Mark II, 5K Classic Operating and Maintenance Manual | Manualzz

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Key features

  • Grounded grid circuit
  • Highest quality RF and DC components
  • Adjustable ALC feedback circuit
  • Forced air cooling
  • Conservative power supply components
  • Resonant choke input and oil filled capacitors
  • Semiconductor diode rectifiers
  • Standby switch
  • Pi-L plate circuit with silver plated tank coil

Frequently asked questions

The frequency range for these amplifiers is 3.5 to 30 MHz nominal. However, the 3K Classic Mark II version sold in the United States is restricted by FCC regulations and cannot operate on the 28 MHz band.

These amplifiers can be used for SSB, AM, CW, FM, or RTTY operation.

The 3K Classic Mark II offers 1540 Watts PEP and 750 Watts Continuous. The 3K Classic X Mark II offers 2500 Watts PEP and 1500 Watts Continuous.

The 5K Classic offers 3500 Watts PEP and 2400 Watts Continuous.
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