loop feed

Helical loop antenna for 20 meters - A Helical Loop Antenna for the 20-meters Band

40 meter delta loop - M0MCX - Pictures and details of a wire delta loop antenna for 40 meters band

Dual Loop 80 and 40 Meter  ^pop - A dual loop antenna, ZZ Wave Net HF Wire Antenna Project by VE6VIS. The antenna is basically a full wave 80 meter loop on top and a 40 meter loop on the bottom all supported from a 64 foot center support

A Full Wave Loop for 80 - 10 Metres - VE3HCR article of a home made loop antenna for 80 meters band

F6EZX Deltaloop - F6ezx homebrewing a deltaloop antenna in French

Better Feedline Loss Measurements with Antenna Analyzers - Various publications through the years have shown how the SWR measured on a shorted (or open) feed line can be used to calculate feed line attenuation

Transmission Lines - About feed lines, parallel lines and coaxial lines, notes on impedance, SWR, Baluns, velocity factor and more by NZART

Eliminating TX RF Feedback Problems - Malfunction of transceivers due to stray RF pickup is a common problem, especially when using end-fed antennas, high-impedance feedlines, or a poor ground counterpoise

Receiving antenna for low bands  ^pop - K9AY loop antenna installed at PA6Z Contest group. This is a receiving antennas for the low bands (160m, 80m and 40m). Include schematics and info on a building the control box, preamplifier and low-pass filter

Advanced active VLF Loop - Article on using loop antenna in very low frequencies

Magnetic loop antenna 10-30 MHz - magnetic loop for 10-30 MHz, using acetal rod former, aluminium foil conductor and copper-clad epoxy board capacitor

Magnetic Loop Antenna - Although a magnetic loop antenna(aka small loop antenna) is very compact, its efficiency is close to a half-wavelength dipole if carefully built.

Magnetic Loop antennas - Pictures, designs and answer to common questions on building magnetic loop antennas by ON4CEQ Van Herck

Magnetic loop antennas - Magnetic Loop Antenna, MagLoop, Small Transmitting loop, construction hints, remote control motors

DCTL Portable Antenna - A Low -Power, Distributed Capacitance Twisted Loop , indoor portable HF antenna by Monty Northrup, N5ESE

Shielded-Loop Receiving Antenna - Schematics, mechanical drawings and picture of a Receiving loop antenna by N5ESE - N5FC

Copper Cactus Single Coax Feed - Single Coax Feed to Multi-Band Copper Cactus Antenna.

Las Vegas Metro Police Department 24/7 Scanner  ^pop - Las Vegas, NV Police scanner. It is 24/7 and live.

Attleboro - Mass Live Feed - Live feed Attleboro Ma and Cumberland RI, Fire and Police

Houston area firefighters live feed - Houston FD live dispatch audio and discussion group

Southern Maryland Police & Fire - Southern Maryland (somd) police/fire live scanner feed

MTM Scientific Radio Loop Antenna - Loop Antenna Starter Kit contains detailed plans for building the MTM Scientific, Inc. loop antenna from scratch.

Citizen Weather Observer Program - A private-public partnership with three main goals to collect weather data contributed by citizens; to make these data available for weather services and homeland security; and to provide feedback to the data contributors so that they have the tools to check and improve their data quality

Negative feedback output circuit - Negative feedback is often referred to as shunt feedback in conjunction with emitter degeneration.

Homebrew FT 817 Headset - A simple circuit to homebrew your own headset for the Yaesu FT-817