This double-sideband (DSB) radiotelephone transmitter is powered entirely by the instantaneous (not stored) energy produced in the operator’s voice. The RF output power in my prototype falls within the range of 5 to 15mW. The circuit is essentially a high-level DSB modulator/crystal-controlled RF oscillator.
DX QSO made by author:
10/13/09 W1VZR 57/459 Limerick, ME 160km2.5mW Early ckt; resorted to “mouth CW”
10/22/09 AA1MY 57/33 Bethel, ME 160km 5mW 1st skywave voice-pwr fone QSO!
10/22/09 W1PID 59/54 Sanbornton, NH 109km5mW Horrendous QRN; Fabulous QSO!
MKARS80 QRP 80m Transceiver kit
The MAKRS80 is a QRP transceiver designed for use for use on the 80M band, the circuit was developed from the BITX20 designed by Ashhar Farhan. Although simple in design perceived performance is as good...