What is indicated if a VHF radio fails to receive nearby stations and a voltmeter connected between the positive side of a radio's DC line and ground reads zero line voltage? The fuse in the VHF radio also reads zero when checked with an ohmmeter.

Question

What is indicated if a VHF radio fails to receive nearby stations and a voltmeter connected between the positive side of a radio's DC line and ground reads zero line voltage?  The fuse in the VHF radio also reads zero when checked with an ohmmeter.

Accepted Answer

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

Answer

The antenna may be defective or water intrusion has affected antenna system performance.

Answer

The coaxial transmission line may be open, shorted, or a connector has become intermittent.

Answer

A fault in the discriminator circuit is producing zero output voltage during peak modulation.

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