Αποτελέσματα Αναζήτησης
8 Ιουλ 2016 · Our Easy Receiver is designed to work with our Easy Transmitter, Easy Audio Filter, Easy Tuner and Easy Keyer and Easy TR switch to make a complete QRP station. These boards are so that, if desired, they can be stacked together to produce a compact assembly.
18 Ιαν 2021 · Emergency transmitter: An 8-component, high-power 40m/30m transmitter to get you quickly on the air. by Kostas (SV3ORA) Introduction. QRP is all about doing more with less. This is more than true, with the construction of this cheap, simplistic transmitter presented here.
A series L-C circuit can be used to match a low-impedance load, as presented by a quarter-wave wire. I wanted to build a simple tuner which could be optimized for either situation with the flick of a switch.
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.
This cute little 40 meter CW transmitter is nothing more than a 6AQ5 oscillator coupled to the antenna. Power output is on the order of 6 Watts with 275 VDC on the plate and a crystal with good activity.
18 Απρ 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).
The Circuit The Sudden has only two active components: IC1, an SA602* chip which contains a mixer and an oscillator and IC2, an LM386 audio amplifier chip. The signal at the antenna input goes directly to an attenuator; a 10K linear potentiometer that serves as the receiver GAIN control.
