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The meter in the radio shows the antenna SWR when the amplifier is on standby. Well, if the amplifier can properly imitate a barrel connector when it's not keyed. Some amps do this better than others.

But when the amplifier is keyed, the radio is no longer driving the antenna. It's driving the amplifier's input circuit. The high SWR reading on the radio's meter tells you that the amplifier's input impedance is not close enough to 50 ohms for a low reading.

Don't have a diagram to go by, but there should be some sort of adjustment screw visible on the rear panel of the amplifier. Typically this will be the input-tuning adjustment. Typically set for minimum SWR reading on the radio's meter.

73

[QUOTE="nomadradio, post: 766370, member: 22"] The meter in the radio shows the antenna SWR when the amplifier is on standby. Well, if the amplifier can properly imitate a barrel connector when it's not keyed. Some amps do this better than others. But when the amplifier is keyed, the radio is no longer driving the antenna. It's driving the amplifier's input circuit. The high SWR reading on the radio's meter tells you that the amplifier's input impedance is not close enough to 50 ohms for a low reading. Don't have a diagram to go by, but there should be some sort of adjustment screw visible on the rear panel of the amplifier. Typically this will be the input-tuning adjustment. Typically set for minimum SWR reading on the radio's meter. 73 [/QUOTE]

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