The transceiver mixer and carrier oscillator in the band-imaging (7- and 14-MHz) CW transceiver. Careful selection of
drive levels, and use of a spectrally clean carrier oscillator, assure low spurious-signal content in the transmitter output. This transceiver mixer should prove useful in HF and VHF CW or SSB applications. A Mini-Circuits SBL1 low-cost mixer is used with a 3.579-MHz crystal oscillator that uses a low-cost TV color-burst crystal. By paying careful attention to drive leads, good performance and low spurious content can be obtained.