Tony / I2TZK,
/ K7SFN , Dinesh / VU2FD
SWM3-0511 is here.....
SWM3-0915 is an USB / DC12V Powered SWR Meter.
Project is Based
on Microchip's PIC18F4550.
SWM3-0915 is redesigned (from last version) keeping in mind
existing HF and VHF Bridges and popular demand of Radio Amateurs
looking for simple SWR measurement for their station Radios.
Firmware and PC Software (WinXP/WIN7) for SWM3 is developed by
Tony / I2TZK
and offered free of change for the Amateur Radio Community.
Purpose of this project is to
encourage radio amateurs to build their own SWR Meter at a low
Keeping this in mind, we have avoided use of SMT parts.
SWM3-0915 has following design task:
is developed on two double-sided PTH board. The first one is CPU
board where LCD, Regulator and Back Light Controllers are located.
This board receives pure DC level from sensor (Bridge) board for calculation
A good quality D9 cable will make difference.
Varity of Bridges are availble.
Please refer to bridge webpage for more
is intended for experienced Radio Amateurs.
SWM3 is 100W / 1KW HF/VHF SWR Meter. Dual
scaling (measuring 100w and 1KW on same channel) is possible when
used with dual scale HF Bridge. Readings were very accurate compared to
commercial SWR Meter.
A simple powder coated case for SWM3 and
bridges are available and
offered free of charge with kit or assembled.
SWM3 is also availble as "Assembled"
at the price of a kit to Senior Radio Amateurs.