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Loss of audio when amplifier is moved to operate

WV5Q
WV5Q Member ✭✭
in Peripherals & Station Integration
I have a 6400M that works perfectly. I have an Ameritron ALS-600 that I would like to use. When I turn the amplifier on, everything is normal, but when I switch to operate, I lose all audio on the radio. I am using an ARB-704 relay interface. I have gone over the manual, and all settings on the radio are exactly as the manual shows. Ideas?

Answers

  • KD0RC
    KD0RC Member, Super Elmer Moderator

    What cables do you have plugged in between the 6400M and the ARB-704? Especially, what do you have the ARB704 Radio jack connected to?

  • WV5Q
    WV5Q Member ✭✭
    TX1 RCA to interface, Relay out of interface to amplifier. TX1 checked on TX Band Settings.
  • KD0RC
    KD0RC Member, Super Elmer Moderator

    If you unplug the TX1 cable, does receive work again? I am wondering if the polarity of either TX1 or a jumper in the 704 is set wrong.

  • Mike-VA3MW
    Mike-VA3MW Administrator, FlexRadio Employee, Community Manager, Super Elmer, Moderator admin

    You don't really need the 704, so you are safe to do what Len suggests and I would test without it.

  • WV5Q
    WV5Q Member ✭✭
    Mike and Len (et al), That did it. Took the 704 and the associated cables out, only radio and amp connected with Coax. Perfect. All works FB now. Thanks.
  • WV5Q
    WV5Q Member ✭✭

    I have received a couple of replies to my initial question and problem of, as soon as I switch the ALS to operate I lose all audio on the Flex. I have the RCA plugs to the Relay on the 600 and TX1 (turned on in TX menu). The ALC doesn't seem to cause a problem. I have also had the ALS 704 in line and that doesn't seem to make any difference. I am missing something here. Any suggestions? And to Len, as soon as I put the 600 back in standby I again have audio.

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