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Sonoff 4CHR3 vs 4CHR3Pro for Remote on operation
Comments
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Are you referring to the "Remote Power On Input"? Do not under any circumstances connect any voltage source to that connector. 120 VAC will likely destroy the radio!
The hardware manual clearly states that shorting the center pin to ground will activate the radio. You want to use a normally-open relay that is activated by the 120 VAC to connect here. A suitable relay made by Digital Loggers is available at Amazon for about $17, which will work perfectly. This link takes you right to the product: https://tinyurl.com/r2nsf98d
I have a couple of them, one used to turn my 6500 on and off, the other in conjunction with the station 13.8V power, turns my KPA1500 amplifier on/off.
73, Craig KØCF
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Note Edit:
The 4CHR3 switches AC mains only. I missed that at first reading
It looks as though the Sonoff 4CHProR3 has 4 independent SPDT switches. Just wire 1 of the switches as Craig stated.
Each switch is independent of the others so you can wire 1 for 120VAC to power your power supply and another as just a normally open switch to control the radio.
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Just in case you didn't see this.
If you search in the Helpdesk we have a document on it as well. I can't seem to paste a link at the moment.
73
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That is what I thought, I have a 4CHProR3 on the way. Thanks for the help!0
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I have also tried the Sonoff relay. However, it switched independently every day. That means it switched all channels without me doing anything. The problem seems to be known and I could not solve it. I bought a similar relay from another manufacturer. 73 Thomas DJ2TG0
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Which one did you go to? It might help other users.
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