swr 70cm

DF9CY 11 Element for 432 MHz - A short good performing antenna for 70cm

Moxon antenna for 432 Mhz - A practical example of how to build a moxon antenna for the 70 cm by SM5JAB

Portable 70cm Quadruple Quad Beam - A suitable high gain 70cms antenna for SOTA operation was sought that did not have the drawbacks of a long Yagi antenna, principally a narrow beamwidth and bandwidth.

Parasitic Antenna for 70cm - A Parasitic Lindenblad Antenna for 70cm

Wire Antenna for 75 and 80 Meters - This article is about a wire antenna that covers the entire 3.5 to 4.0 MHz band with an SWR below 2:1 consists of two coupled dipoles, one resonant at about 3.5 MHz and one resonant at about 4 MHz, resulting in the low SWR

The Coaxial Line - Impedance matching, Transmission Lines, Characteristic Impedance, VSWR & Mismatch and Antenna Losses

Log Periodic of Another Sort - A log periodic dipole array (LPDA) antenna design that offer continuous low SWR in 13-30MHz range

Tuning moxon antennas - More on the tuning of Moxons, getting the best F/B ratio and the lowest SWR, moving the feeding point and other constructions considerations

432MHz Moxon Antenna - Contesting for beginners with a bent coat hanger! A moxon antenna project for 70cm band.

AO-40 70cm Uplink Antenna - Homebrew satellite antenna by G6LVB

Matching Waves, VSWR at work - When the radiation resistance (voltage to current ratio) of an antenna is the same value as the characteristic impedance of the transmission line (voltage to current ratio in the line), all of the electrical energy transmitted down the line is taken by the antenna and radiated into space in the form of a radio wave.

Yagi antenna Q Factor - How you can calculate antenna Q factor for use in antenna quality evaluation instead of use of VSWR bandwidth.

Big Wheel Antenna for 70cm - A Big Wheel Antenna for the 70cm Band by Eugen Berberich, DL8ZX

Antenne verticale HF. - A vertical antenna project than can present low swr from 40 to 10 meters by using a balun in french

VHF UHF European Beacons - MMMonVHF maintains the data for 6m, 2m, 70cm and 23cm bands in collaboration to LA0BY. This site allow display of a beacon map and latest beacon spots.

OK1DX Pavel - Personal web page with some electronic projects like rotator controler AVROT, SWR Mega meter and personal amateur radio information

MFJ Enterprises  ^pop - MFJ manufacturer of ham radio antenna products, antenna tuners, antenna analyzers, morse code & CW, SWR wattmeters, antenna accessories , power supplies, audio filters, TVI filters, baluns, coax switches and more

Ningbo Zhongce Dftek Electronics - SWR meters, Power supplies, millivoltmeters, Oscilloscopes, signal generators, function generators China.

DK9SQ Antennen - Walter Spieth Antennen offer, Duoband-Portable-Log. Periodic 2m/70cm, Vertical-Loop-Antenna,10-40 Meter and PortableW3DZZ-Antenna as well as fiberglass tubes

UK_ATV : UK Amateur Radio ATV - This group is for any Amateur Radio Televison Enthusiast. From 70Cms - 13Cms and above.

MeterMate - SWR Graphing Software for Amateur Radio by KD4UDY, shareware

1.5KW GU-43B HF Linear - by PA0FRI, 1.8 - 30 MHz, Input 50 ohm SWR <1.2:1

Diplexer 2m 70cm - This DIPLEXER separates 2m from 70cm on the same coax cable, and allows to use 2 antennas over the same cable and permits transmission on one band and simultaneous receiption on the other band by hb9abx

Very simple wattmet - A very simple QRP wattmeter project by SP5DDJ based on schematic of SWR meter developed and published by JA6HIC

Wifi VSWR Meter - A Wifi (V)SWR Meter to build yourself