swr protection

JA7KPI Windom antenna for 40-80 - The total length of this antenna is 41m, height is about 11m, and diameter of element is 2mm. JA7KPI modified this antenna originally used as Inverted-V type of 80m band Dipole. Works on 40 - 80 meters band with acceptable swr.

Simple HF Baluns for 50/75 ohm coax - Show diagrams, winding methods and tables of some 1:1 and 4:1 baluns for 1.8 - 30 MHz suitable for use up to 200W (400W peak) on systems using 50 or 75 ohm coaxial cable input where SWR should not exceed 1.6:1.

Antenna Feeders - Different types of feeders, SWR and matching

Tuning Your Antenna - Getting the best performance from your investment

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

Vertical antenna for Vacation - Vertical Vacation Antenna for 80, 40 and 20 Meter-Band, by Herbert OE3BMB This antenna is a full size λ/4 for 20m and 40m band, and a shortened λ/4 for the 80m band. Generally on the 40m band the SWR is under 1,6. In 80m and 20m band at the resonant frequency the SWR is about 1,1.

Musings on the Miracle Whip design - A modified design of this popular portable antenna The whip described here will tune up to a respectable SWR on 40 metres and up.

Ham Radio Tower at NØHR - Ham Radio Tower Project at N0HR. Includes site plan, escavation, tower construction, HF antennas, grounding and lightning protection, coax and more.

Antenna Tuning Unit - This homebrewed antenna tuning unit also incorporates a 50-ohm QRP dummy load, power meter (1 or 10 Watts full scale), and SWR meter

Automatic SWR meter  ^updated - Automatic SWR meter and semi-automatic tuning unit by F1FRV

10 m Aerial Matching Unit - This simple matching unit will allow a 10 meters aerial to be used right across the 10m band without the need to physically adjust the elements, and offers a virtual 1:1 VSWR at 50 ohms impedance to the transmitter.

HB9FX Internet Remote Base JN37XH Hochwacht Zofingen Switzerland - Tune and / or listen between 10kHz - 10GHz to professional Online-Receivers as Rhode & Schwarz EK070 or AEG E1900/3, Amateur-Radio-Transceivers, Web-SDR, Digital-Modes, Repeaters, EchoLink, APRS or control Antenna-Switch-Matrix, Antenna-Tuner, SWR & PWR- Control or Web-Cams.

Lashen Electronics - From connectivity for the home or small office and home theater cabling solutions to power management and protection as well as home and office sound and video solutions, lashen electronics has the tools and technology you need to do the job right.

A Guide to Test Equipment - That just about sums up many peoples’ attitude towards test equipment. Multimeter, SWR/Power Meter, Dip Oscillator, RF Signal Generator, Cathode Ray Oscilloscope

RadioWare - Products and books for the radio hobbist. Antennas, Coax cables, filters,Lightning Protection, Wire & Cable, Books

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

Ham Shack lightning protection - Article by Hal Myers K4JHM

Lightning Protection for the Amateur Radio Station - Article on lightning protection for the ham radio station, Lightning Characteristics, Identify What is to be Protected, Establishing a Good Ground, Coax Cable Grounding, Operating Safety by wrblock.

Lightning Protection : Protecting each I/O line - KB22UT Article on how protecting ham radio station and in particular I/O Lines such as AC power, coax cable, control circuits, telephone line.

ARRLWeb: Lightning Protection - ARRL Resources about Lightning Protection for the amateur radio station

OH5IY Antennas Lightning Protection - Thoughts of ham radio station lightning and transient protection, finnish legistlation, rules, standards, principles, examples, data, graphs, formulas and transient protection device schematics.

Lightning protection for Amateur Ham Radio - nr6ca article on Lightning protection

Protecting Amateur Radio Station - Developing a protection plan against lightning

A QRP SWR meter - A real QRPp VSWR Meter project by DJ1ZB

A simple SWR Meter - This article describes a simple QRP SWR meter built using readily available parts.