Search results
A Credit Card sized HF T-MATCH ANTENNA TUNER for QRPp and QRP Portable Operations. Lately I am fascinated with miniscule RF power HF rigs and their performance on Digital Modes such as FT-8 and FT4.
The tuner is assembled in an affordable Chinese case 100x71x25 mm, the front and rear panels are made as PCB, in the same way as the main printed circuit board.
18 kwi 2020 · Being a parallel resonant circuit, the Z-match can provide some band-pass filtering for your receiver and harmonic attenuation for your transmitter. A well-designed Z-match tuner has a high Q and is more efficient (less lossy) than other types of tuners. The fixed inductor simplifies construction (no taps or rollers needed).
Basic multi-z antenna tuner for QRP. Easy to tune low-z and high-z antennas. This is just an experiment while testing it with my 40m EFHW antenna.
1 paź 2021 · David N7DDC has released a new version of his ATU-100 as a low-power consumption and 10 W QRP version of his popular autotuner. The design is focused on low power consumption during operation. Latching relay are used make this happen.
Antenna tuners (or transmatches) are great projects for the budding homebrewer. They're fairly easy to build from scratch, usually very forgiving with respect to component values, and very useful to have around the shack.
The QRP Manual Tuner appears to be the combination a few pieces of work, some that are possible to locate on the Internet. SWR Indicator Circuit - Dan Tayloe N7VE LED SWR indicator
