It's not an AND gate, it's a NAND gate. Two inputs high make the output low. Any input low makes the output high.
On 23-Jul-10 18:28, Brian Koontz wrote:
An updated update: My TR-7 now receives in all bands, thanks to a replacement TX exciter board that was silencing the receiver. (I still can't figure out how an AND gate can go high with only one input high, but that's an investigation for another day.)
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