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新颖应用电路·实用电路集（ＡＮＰ．４４８～４５３）４４８．民用频段到短波的下变频器这种变频器能实现短波或中波收音机的调幅（ＡＭ）或２７ＭＨｚ的民用频段（ＣＢ）单边带调制的远距离收听（应当说明的是，ＡＭ或以２７ＭＨＺ民用频段的单边带（ＳＳＢ）调制，在一...
Novel Application Circuits · Practical Circuit Sets (ANP.448 ~ 453). Frequency Converters for Commercial to Shortwave This frequency converter enables long range listening of short-range or medium-wave radio AM or single sideband modulation of 27 MHz civil frequency (CB) (it should be noted that AM or 27 MHz Civil frequency band single sideband (SSB) modulation, in a ...