roof top tower

Online Antenna Analysis and Design Software  ^updated - Free online software to calculate wire antenna power patterns, directivity, input impedance using method of moments.

Weatherproof UHF and microwave cavity antennas - General circular-waveguide-horn antenna design

Communications Towers - Basic information about tower purchasing and installation will help you to communicate your requirements to a tower manufacturer, leading to better decisions and a smoother process from inception to installation.

Boat and Engine Hoist Ideas for Raising Crank-Up Towers  ^updated - Alternate means of raising your tower with readily available boat and engine hoists. Examples of working tower hoists with links to manufacturers.

GuyMast - Software for analysis of guyed and self-supporting towers & poles

AA1K towers - Antenna setup at AA1K consisting of 6 Rohn towers

DL6WU Yagi antenna - The DL6WU yagi for 23cm bu M1EEV

Double T Bar Verticals - Double T Bar Vertical antenna are vertical antenna with cross bars on the top and bottom. These crossbars provide capacitance loading thus reducing the size of the antenna

Top Loaded vertical antennas - Simulation of a top loaded vertical antenna for 1.2 MHz

Short vertical antenna for 80 Meters - A short antenna for 80 meters band , article with pictures and details by N4SPP

W3EDP and grounding - Discussion on W3EDP Antenna and grounding

EI4GYB Amateur Radio in Ireland - Amateur and ham radio news from Ireland with propagation reports, solar alerts, contest activity and news, Crank up tower installation and tips

Wallpaper images for Ham Radio - A few images to use as a desktop background.

SEC America, LLC - offers Rack Mountable DC Power Supplies, OEM Power Supplies, and Communication Series Desktop Power Supplies for a wide range of uses, including powering radio equipment.

AM Operation Using Power SDR - AM Operation Using Power SDR with Flex and Other SDR Platforms

ARRL High Speed Digital Topics - Amateur radio HSMM High Speed Multimedia, data and voice at ARRL website

High SWR after AL-811 10 Meter mod - Very High SWR with the 10M Mod to Ameritron AL-811 amplifier

Scans of Elecraft PCB Boards - Elecraft K1 & K2 PCB scanned top & bottom, for troubleshooting

K2 Change 20 30m band filter - Elecraft K2 mod. Narrower bandpass filter, better stopband attenuation

Yaesu FT-920 filter installation - Inrad Roofing Filter installation instruction

TM 241 battery replacement - Kenwood TM-241 battery replacement topic

PocketPacket Mac OS - PocketPacket started as an APRS client for iPhone/iPod Touch/iPad devices, but is also available for the Mac desktop or laptop. PocketPacket incorporates a software-based TNC, allowing you to directly capture and visualize, or encode and transmit 1200 baud packets (AFSK modulation) using a VHF radio transceiver.

R-20 Signal Capture and Analysis Software - Connect your R-20 Communications Receiver to your computer. Put your listening hobby on your computer desktop.

UTC World Clock - Dual display shows UTC or local time on top and lower display shows time in another time zone or country selected from a list.

Band-stop filter - Wikipedia page on Notch filter, a narrow stopband - high Q factor filter