A band I’m interested in is 4m which in the UK we are allowed 70MHz to 70.5MHz. I’m mainly interested in the MS and ‘E’ capability of this band but very few commercial SSB radios have 4m built in so the easiest way is to transvert, usually from 28MHz with a 42MHz oscillator to get 70MHz. For those unfamiliar with transverting this mixing will produce 2 frequencies, one 42MHz above and one 42MHz below, if we take 70.2MHz this means an unwanted one at 112.2MHz [...]