Halbert.PA@XEROX.ARPA (09/07/84)
I want to build a small simple QRP transceiver one of these days, probably with a direct-conversion receiver. I have lots of designs from ham radio magazine and QST. The most interesting simple ones use local oscillators that operate at half the desired frequency. The receiver would use a back-to-back diode mixer, and the transmitter would use a doubler, which helps isolate the VFO or VXOand keep it stable. 1. Does anyone have any practical advice about such designs? Have you built any? 2. There are more and more linear IC's available that could substitute for various stages of the rig that would be built out of dicrete components. For instance, The Sept. 3 issue of ElectronicsWeek, page 149, describes a new Signetics IC that is a combination double balanced-mixer and oscillator, good up through VHF. But I don't have any really new linear data books that would describe such IC's. Does anyone know of some nice ones that work well? Have you built anything with them? Tnx. --Dan, N6ICX, Halbert.PA@Xerox or ucbvax!halbert