Re: uBITX and nulling the carrier #ubitx-help



The short answer is, you don't. The newer released uBitx's dont have a way to null the carrier because theoretically it's not necessary due to the diodes used in the mixers. It's near impossible to find two discrete diodes that are perfectly the same, but the SMD diodes, (I think BAT54SL),  Farhan used are two diodes in a single package that are as near the same characteristics as you can get, so eliminating the need for a null adjustment. Maybe yours are not perfect?


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