ARRL HB CHP 34 FIG 16
Description: The project originally appeared in Feb. 1990 QST by Roy Lewallen. The meter sensitivity is 5mW to 10 Watts using a 0-1mA meter movement. The RF pickup strip line is etched on the board. ICs CA3160 and LM358 are used in this project.
Description: This is a terminating micro wattmeter that measures power levels between 10nW to 10uW with a +/- 1db accuracy up to 150Mhz. Devices required are INA2128, CA3039, and 78L12. The display is on a 0-1 Ma meter.
Description:This project adds peak reading capability to your present watt/SWR meter. The circuit connects across the analog meter. This circuit then gives you a 10 LED indication that is fast enough to respond to the power peaks. Two boards are required to view forward and reflected levels at the same time. Circuit uses LM3914 and 11 LED's.
QST Dec 99
Description: The mini kit consists of a control
board, an RF pick up board, a programmed PIC, and the crystal for the
PIC. The SWR is displayed on LN526GN two digit LED display. The
control board uses PIC, 7445, and 7805. The pick up board uses (4)
1n34, and FT-82-61 toroid core. The unit is good to 100w from 160m to
10 meters. The whole thing is housed in a 3"x5"x5.625" Radio Shack