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One way to check for a problem in the standby side of an amplifier's relays is to put a SWR meter between the radio and the amplifier's radio socket. With the amplifier UNPLUGGED, hook the amplifier's antenna socket to a dummy load.

Key the mike on AM and set up the SWR meter, and see what the SWR is feeding into the amplifier turned off.

Now tap the relays, one by one and see if the SWR reading jumps up.

A tiny upwards flicker is probably okay if you tap the relay hard enough. But if a relay is dropping out, you'll probably get a bigger rise out of it, revealing bad contact points.

73

[QUOTE="nomadradio, post: 594854, member: 22"] One way to check for a problem in the standby side of an amplifier's relays is to put a SWR meter between the radio and the amplifier's radio socket. With the amplifier UNPLUGGED, hook the amplifier's antenna socket to a dummy load. Key the mike on AM and set up the SWR meter, and see what the SWR is feeding into the amplifier turned off. Now tap the relays, one by one and see if the SWR reading jumps up. A tiny upwards flicker is probably okay if you tap the relay hard enough. But if a relay is dropping out, you'll probably get a bigger rise out of it, revealing bad contact points. 73 [/QUOTE]

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