Radio Shack used to have an IR remote control Antenna selector for about $40. You may find something used or a similar product for less if you look around. You may be able to connect a cheap 12 volt "wall wart" power supply to an RG6 connector input and then output the twelve volts to your Krell amp when you select a secondary input on the antenna selector box. You would have to do some wiring but it would work and it would be cheap. Make sure you wire the negative lead to the shielded side of the RG6 cable if you do it. Thats just one idea. I don't know why you need remote control unless the amp is hard to reach. It would be easier to send a 12 volt turn on signal without an IR remote. Can you add details and perhaps we can create an easier solution if you provide more information?
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