Qrp Hf Swr Meter
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Shorty Forty Antenna
City dwellers and other flat dwellers know the practical difficulties they encounter when they try to put up an antenna for 40 meters. Finding space enough to accommodate 67 feet of wire is a real problem for them and most...
Loop-stick Antenna for AM band
Wound on a 3 foot length of PVC pipe, the long loopstick antenna was an experiment to try to improve AM radio reception without using a long wire or ground. It works fairly well and greatly improved reception of a...
KC2ZPLs Web Design and Electronic Home
KC2ZPL Web Design, electronics, HAM radio, CW, homebrew construction, general electronics, high voltage, experimenter's web page.
The KC2ZPL web page serves as a comprehensive resource for individuals interested in various aspects of electronics and amateur radio (HAM radio). It covers a...
Simple-ham-band-receiver
This circuit is designed for operation in the 80m band. It utilizes a 365-pF variable capacitor, specifically intended for the broadcast band, which should be equipped with a vernier drive featuring a six-to-one tuning ratio. This configuration enhances the tuning...
optimized 6 element uhf yagi antenna
The diameter of the antenna elements can range from 5.8 mm, while the dipole diameter can vary from 8 mm to 12 mm, with 12 mm being the recommended size. This adjustment can be made without altering the length or...
The ATL-3 Loop Antenna
All ATL-3 loop windings are center-tapped and balanced with respect to their amplifier/receiver chassis ground, which leads to self-cancellation of electric field interference. Magnetic noise fields, such as those from televisions and electric meter boxes, or electromagnetically radiated interferences, can...
HF VHF receiver diplexer
An Icom PCR-1000 is utilized for listening to various MF, HF, and VHF radio stations. There is a minor inconvenience related to the antennas. The K9AY antenna performs well from 500 KHz to approximately 25 MHz, while the discone antenna...
HF linear amplifier circuit
The power amplifier (PA) output Pi section features two variable capacitors: one ranging from 20 to 120 pF and a second, custom-built capacitor with a range of 50 to 450 pF. The latter is activated for lower frequency bands using...
A long-wave SWR meter
This document outlines a simple SWR meter designed for long and medium wave bands (137 kHz and 500 kHz). The design is not novel and resembles common short wave meters, but it has been specifically created to operate at low...