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HF+6M KW amplifier
Eimac 4CX1000A
Construction date: 1971.

• Complete metering of all parameters.
• Regulated grid bias and screen voltage supplies.
• Heater voltage and bias adjustment on the front panel.
• Full protection circuits. An overload condition puts the amp
on standby and connects the transceiver to the antenna.
• Full HF tuning with heavy edge-wound rotary inductor.
• Two vacuum variable capacitors, rated 15 kV and 3kV, allow
matching to high SWR loads.

Full description: QST, July 1986, Nov 1989; CQ, July 1990.   pdf

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