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The z-match acts as a mighty good pre-selector (a good thing, ordinarily, but not for shortwave listening). For example, if I tune the z-match for 40 meters, I can just about hear KEEL on 710 kHz, which ordinarily comes in 40 db over S9.
It is a modified version of the well-known Z-match and is designed as the result of experiments in reducing the SWR on the five HF bands between 3.5 and 28 MHz (incl. the WARC bands) without the necessity for switching coils and with a minimum of knobs.
18 kwi 2020 · Matches balanced loads without the use of lossy baluns. 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.
Z-Match ATU. This QRP version by G3WQW, using a T130-2 toroidal inductor and polyvaricon variable capacitors was published in Sprat #84. An article in QRP Quarterly by Charlie Lofgren, W6JJZ recommended using a T130-6 instead of a T130-2 for better Q and provided new turns values for use with the T130-6 toroid.
The best match between transmi*er and antenna occurs when the bridge indicates a null seen as the dimming of the LED. The signal is coupled into the Z Match via C1; a variable but high value of capacitance. The Z Match is a parallel tuned circuit with link coupling to the antenna.
Z-Rock ATU operation. Z-Rock ATU is designed to "tune" or match your transmitter to properly designed antenna systems for the 80 through 10 meter amateur bands. Connections for various types of antennas include: Coax Feed. Balanced Line Feed.
Matches balanced loads without the use of lossy baluns. 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.
