swr 70cm

A 5 element beam for 10 meter band - Here is a very simple 5 element covering the entire 10 meter band (28.000-29.700) with a swr of less than 1.4 at the band edges

2m VHF antennas with high gain - 2m SSB/CW-12.5 Ohm Yagis with extrem high gain and small bandwidth. These Yagis were constructed as ultra-light, portable Yagis with extrem high gain. They have small bandwidth and are working from 144,0-144,8MHz with good SWR.

Bazooka dipole for 70 cm band  ^updated - Here is a very simple 70cms dipole from Harald PD2HFE, which uses a single piece of RG-213 coaxial cable 34 cms in length.

Build A 9dB, 70cm Collinear Antenna  ^pop - 70cm, Collinear Antenna From Coax

70cm yagi antennas - Pictures and plans to build 70 cm yagi antennas

70cm Longyagis - 70cm-Longyagis in 28Ohm-DK7ZB-Design

80/75 Meter 4-Square Array - This array has been in use since 1989. The SWR from 3.5 to 3.9 is below 1.5:1. The F/R of the array is 20dB average and with some signals even better.

Transmitting Baluns - One of the most popular Ham-lore rumors is a balun's performance can be tested or evaluated by grabbing the coax and watching for an SWR change. This is probably one of the worse test-rumors circulating

WB6ZQZ 3 in 1 Balun - Builing a triple ration balun, that match resonant antennas from 9 ohms to 75 ohms with 1.5:1 or less SWR

Build An LF Antenna Analyzer - A Portable Low Frequency Antenna Analyzer, For those of us who like to play with antennas on the ham bands, one of the handiest tools to have around the shack is an "antenna analyzer". These gadgets combine a signal generator and standing-wave ratio (SWR) sensor in a small battery-powered unit.

Effects of VSWR on Transmitted Power - By James G. Lee, W6VAT

M1IOS - Wonder Whip antenna and tuner Priority listing - M1IOS Wonder Whip antenna - The M1IOS Wonder Whip A 10 dollars QRP Portable Multiband Antenna for HF, VHF and UHF A variation on the Miracle Whip and Wander Wand. This antenna tuning unit will get your SWR really low on telescopic whips, mobile 3/8th antenna and long wires. A remarkable little tuner that really works!

70cm Quadruple Quad - A suitable high gain 70cms antenna for SOTA operation by Richard Price GW0VMW

70cm Quagi antenna - Building a 70cm Quagi to Work AO-51 by K6JEB

Vertical antenna for 2 mt and 70cm  ^pop - How to Build a Dual-Band Antenna for 2M/70cm

Rob's UK CB Radio information site - Rob’s uk cb radio information website, here you will find information on cb radio, swr, Morse code, frequency charts, 10 codes, q codes, z codes, cb chat room, cb radio forum plus lots more.

DF6NA : VHF Audio Examples - Sporadic E, meteor scatter, 70cm 23cm and 10Ghz audio recordings in various modes

A & A Engineering - Smart Battery Chargers, WeatherFAX, Color SSTV,GPS-Based Frequency Standard, Power/SWR Meter, , Digital Frequency Synthesizers

Nissei - VU Meter, Analog Meters, Panel Meter,Multi-Meter, SWR meter, power supply, power meters

XLZIZL by AC6LA - XLZIZL is an Excel application that analyzes the components of an antenna feed system, including transmission lines, stubs, baluns, and tuners. Calculations include impedance transforms, SWR and reflection coefficient, power loss, voltage and current standing waves, stress on tuner components, network attenuation (S21), and return loss Analysis results are available in worksheet format and in five different chart formats, including Smith charts.

Coax Cable loss and SWR calculator - This small window application will calculate Coax Cable loss from SWR and SWR from Cable Loss

AA5TB Antenna Coupler / SWR Bridge - Wire antennas requires a special coupling network to properly couple my 50 ohm coax to the antenna's high impedance (5000 ohms)

Prototype SWR meter for 2.45Ghz - Testing antenna's is a lot easier if you have a good swr meter this is a prototype of a design by g7eyt.

Digital QRP SWR & Power meter - A KD1JV Melt solder kit, a swr and power meter operating from 160 to 6 meters ideal for portable and field use

Rainbow Antenna Analyzer - A small and inexpensive measurement device designed to determine antenna performance across the amateur bands through use of automatically collected SWR readings