That is the way it is supposed to work when there is a preamp between the antenna and the power supply.
Did you inherit that system from a previous owner? Who put the 0747 in the system?
Quote:
I'm going to start over tomorrow with a new antenna, pointed to the VHF channel, without amp.
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What new antenna? A separate VHF antenna like the MCM 30-2475 or 2476 combined with the Zenith or a VHF/UHF combo antenna? For what, ABC?