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My Select-O-Matic Two

As homebrew project I designed and built a device I called the Select-O-Matic Two.

It's an Arduino based controller box for my shack that selects a remote controlled relay box. When I press the PTT on my Icom 7300, for example, it selects relay 3 and connects it to the KPA500 amplifier. When I key my Flex6600, it selects relay 2. Using a Visual Studio console I wrote on my shack computer, I can also remotely control the SOM2.

There are two Auxillary ports to control the FLex 6600 power. Aux1 turns off the Remote On/Off BNC and 10 seconds, when the Flex6600 shuts down (the power button is amber), it kills the 12v power supply. Aux2 controls the Flex On/Off remote without turning off the 12v power supply. To save money on my electric bill, at night I always shut down the power in my Shack.

I'm wondering if I'm harming the Flex 6600 my shutting down the power every night?


  • KD0RC
    KD0RC Member, Super Elmer Moderator

    Wow Jack, that is very impressive!

    The question of whether to shut down the Flex or leave it running 24/7 has been discussed many times here. I don't think it makes much difference in the longevity of the radio either way. I shut mine down every night and typically power it up when I get up in the morning. I don't usually power it up and down between uses during the day.

    We get afternoon thunderstorms here during the summer, so I usually shut everything down for that, then power back on when the storm passes.

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