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since 5.April 2006
DC (direct conversion) transmitters
I made several different DC (direct conversion) transmitters in past mainly professional type. High performances DC transmitter is not simple construction and final specification depend from many things. In part about DC receivers I gave some solutions for blocks which are the same with DC (direct conversion) transmitter. Testing my SDR transceiver designs enforced me and I come back in past and tried some old solutions. Missing SDR free software for transmission at my SDR transceiver design at the beginning of 2006 I try to solved with some classic I/Q AF design with help a new free software. The results are very curious for HAMs who want to make direct phasing type SSB transmitter. Here I present a lot different realizations and simulations for normal AF bandwidth or SDR frequencies up to the 20 kHz. Some solution from this design I included as part of the realized control board B2A2.
