Back in the late 1970s, there were countless projects for DC (Direct Conversion) receivers that had surprisingly good performance. Most folks don't realise that this method is capable of generating perfectly good SSB signals as well, without the need for crystal filtering OR persnickety phasing adjustrments. The only tricky part is coming up with a very clean synthesizer over the entire HF range. However, there are some good low-cost DDS chips available now that do the job nicely. I'd like to hear from any other hams who have experimented with this method.