AMERITRON ALS-606, Инструкция по эксплуатации

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Amplifier Overview
The Ameritron ALS-606 is a solid-state, 600-watt nominal RF output power, 1.8-54 MHz
amplifier. The ALS-606 meets or exceeds all FCC requirements governing amateur
radio external power amplifiers.
The ALS-606 uses four low-distortion MRF-150 (or equivalent) SSB RF power
transistors in push-pull parallel. Ameritron recommends running 600 watts or less peak
power for maximum linearity and component life. It is always a good idea to use an
oscilloscope to verify proper linear SSB operation.
Protection circuitry reduces power as transistors approach conservative thermal limits,
and disable the amplifier before exceeding safe transistor operating temperature limits.
(See warning table.) A fan speed-control system monitors heatsink temperature.
Room temperature amplifier bias is nominally 250 mA per FET, or approximately 1-
ampere total. Amplifier supply voltage is nominally 50-Vdc. Maximum allowable voltage
is 58 volts.
Harmonic suppression comes from push-pull operation of linear devices, followed by 5-
pole low-pass filters. This amplifier uses modern multi-layer high voltage chip capacitors
where applicable. Chip capacitors, due to low internal inductance and higher Q, offer
significantly improved harmonic suppression. Harmonic and spurious suppression is
excellent; external low-pass filters have minimal effect on TVI. The most likely cause of
any RFI or TVI will be fundamental overload from inadequate consumer device RFI
immunity.
Relay switching time is approximately ten milliseconds. Radio adjustable TX delay
should be set to 10 mS.
The T/R “Relay” control jack is well within the range of almost any transceiver or radio.
The “Relay” jack has an open circuit voltage of approximately 12 volts, and closed
circuit current less than 15 mA. Virtually any modern amateur radio will directly key this
amplifier.
This amplifier includes full metering using large easy-to-read conventional cross-needle
panel meters. The meters read all critical parameters, including Forward and Reflected
peak envelope RF power.