What may be indicated if a VHF radio operates normally but the transmitter produces nearly zero RF output in the high power mode on all marine channels?

Question

Accepted Answer

The SWR protection circuit in the transmitter has engaged to prevent damage to the Power Amplifier .

Answer

The antenna system is presenting a Standing Wave Ratio (SWR) of 1.5 to 1.0 on the desired frequency.

Answer

A "crowbar" circuit in the power supply has prevented an over current condition that might damage the radio.

Answer

A 50-ohm impedance in the antenna system is preventing the transmitter from achieving full power output.

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