swr protection/cache

ZMV Spiral antennas - An experimental antenna similar to the TAK spiral antenna was evaluated for SWR response over the frequency range of 7.0 to 7.3 MHz, or the 40-meter band.

10 meter wonderbar antenna - 10 Meter WonderBar Antenna, present an SWR 1:1 over entire band, great DX, rotateable by hand, 8 ft long - build for about $20

Broadband 80/160 Meter Dipole - An easy to build single wire antenna for 160 and 80 meters with a better than 2 to 1 swr across the 80 meter band by K5GP

30 Meter Loop by N9MW - This antenna is an easy one day construction project. It was made out of common number 12 stranded electrical wire. Read more about SWR reports and home brewing details.

12 elements Yagi for 70Mhz  ^updated Priority listing - A Monster Yagi for 70MHz huge gain, clean pattern and flat SWR 50 Ohm, no matching required

11elements yagi for 70MHz Priority listing - Low Noise 4m LFA Yagi. No matching needed, flat SWR across the band. Ideal for field day etc. Serious gain and F/B by G0KSC

10 elements 70MHz Low Noise LFA Priority listing - A 10 element 4M LFA Yagi. Flat SWR across the band, easy build with no matching to install. No power limit high gain.

Low-Noise LFA Yagi for 70MHz Priority listing - Super flat SWR from this high gain easy-build Yagi. Great for home or fild day.

9 elements 50MHz 12.5Ohm Yagi - A DX antenna for Serious hams. High gain, super flat SWR. The ultimate 9el 50MHz Yagi

Radio Antenna System Evaluator Site - This JavaScript program evaluates the performance of your cb or ham radio antenna system, computing the consequences of SWR and feedline loss.

VSWR Loss Calculator - This calculator is designed to give the efficiency loss of a given antenna, based on the input of VSWR (voltage standing wave ratio) and other subsequent factors

Broadband Dipole 2MHz o 30MHz with no ATU - A broadband travelling wave dipole for HF bands, whose VSWR is less than 2:1 from 3 to 15 MHz and does not exceed 2.6 to 1 from 2.3 to at least 30 MHz

Measuring Antenna System SWR - Have you measured the SWR at the antenna?

SWR with non-resonant antennas - SWR with multiband and non-resonant antennas

Antenna Matching - Antennaa matching basics, matching input impedance, reactance vs. SWR, info on inductive matching and UNUN Matching systems. Capacitive Matching Odds & Ends by K0BG

Duoband DK7ZB-Yagis 2m and 70cm - These Yagis cover the range of 144-146MHz on 2m and 430-440MHz on 70cm. They can be used for alle modes (FM and SSB/CW). On both bands the SWR is good across the whole band.

WE-030A Antenna Analyzer - Small and simple to use, this antenna analyzer can speed and ease the tuning and adjustment of HF antennas. It measures the fundamental parameters SWR and return loss.

Telepost - Digital Vector Wattmeters, Dummy loads, software defined panadapter systems, SteppIR Tuning Relay, Digital SWR meters, LP-Pan Pan Adapter IQ Decoder for SDR based panadapter system

Cushcraft R7 repair and tests - F5DQK repairing and swr measurement tests of a Cushcraft R7 Antenna

Gap Titan dx SWR tests - GAP Titan DX Measurements of SWR report by WT5L

Return Loss, SWR, Power Gain and Loss Calculator - A neat tool for your daily ham activities around the shack

KD1JV Digital SWR / Power Meter - This small, light weight digital SWR and power meter uses an Atmel AVR Butterfly demo board and a Stockton type directional coupler.

Automatic 1.8 – 60 MHz SWR/WATTmeter - A PIC16F876 based, automatic 1.8 – 60 MHz SWR/WATTmeter A project from Il Club Autocostruttori of the Padova ARI club Italy

Portable RF Sniffer and Power Meter - Whether we are tuning up homebrew equipment, checking antenna VSWR, adjusting a linear amplifier, or just monitoring output power during a contest, almost all aspects of ham operation can use a power meter. Paul Wade W1GHZ

QRP SWR Meter - SWR meter for low power output measurements, dedicated to QRP operations