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The use of dummy load is mandatory for off-air adjustment of the transmitters. Build one.

Here's a tale of early '70s vacuum tubes, mainly from the viewpoint of amateur radio.

Experiences with Loop antennas at G3YMC include some loop antenna tests and theory by G3LHZ

The Minuteman Repeater Association is a non-profit communications organization serving the public in times of emergency.

Here are 10 tips and truisms that every ham should know about antennas, by W20QI

This resource presents a domain name for sale, specifically _Kl7aa.com_, for $995, with an option for a 24-month payment plan at $41.46 per month. The page details the purchasing process, including immediate domain access, zero percent financing, and secure shopping. It also outlines the transfer process to other registrars like _GoDaddy_, clarifies what is included with the domain purchase (only the domain name, not hosting or web design), and explains how to maintain WhoIs privacy protection. The content includes testimonials from buyers like Dann Berg and Greg Shepard, highlighting smooth transactions and quick domain delivery. It also provides information on HugeDomains' 30-day money-back guarantee and frequently asked questions regarding domain transfers, access post-purchase, and payment plans. The page emphasizes the importance of a web address and lists other similar domains for sale, such as _Kl35.com_, alongside quick stats about the domain's length and structure.

Find out about the latest launch and mission to the Mir Space Station or Shuttle now consolidated in a single web site

ITELITE manufactures omnidirectional, sector and directional antennas 900 MHz 2.4 GHz 3.5 GHz 5 GHz 5.8 GHz antennas.

German DOK award program management windows software by IK6CAC

Shareware windows program to manage IOTA contacts and IOTA awards by IK6CAC

The K-Com website, originally intended for RFI rejection products, currently hosts content for a Nigerian football betting platform. The site promotes wagering on live EPL, NPFL, and UCL matches, offering competitive odds and instant OPay and bank payouts. It highlights features such as a **99 sign-up bonus** for new players, daily deposit rewards, and VIP cashback, alongside a mobile-friendly interface and NLRC licensing. The platform provides a demo hall with _1,000,000 demo credits_ for guest players to test strategies without registration. It emphasizes secure and reliable gameplay, instant withdrawals, and multi-game access, claiming over 100,000 active players. The content includes user testimonials and an FAQ section addressing game access, registration, promotions, and mobile compatibility, but contains no information related to amateur radio or RFI filters.

Radio astronomy research at the University of Calgary

Site dedicated to amateur radio astronomy, providing information on Earth-Moon-Earth (EME) communication, the Search for Extra-Terrestrial Intelligence

Manufacturer of fiberglass parts for kites

Live feed for NHP rural areas of Moapa Laughlin Primm Alamo Indian Springs

This resource presents a domain name for sale, Grandicelli.com, which was previously associated with an HF-VHF-UHF-SHF digital monitoring site, Wavecom Decoder tools, Winradio and DRM decoders, a WD3000 Direction Finding System, Radioraft software, and a PFSL3000 Integrated HF-VHF-UHF signal monitoring system. The current page functions as a sales portal, providing information on the domain's price of $695, with an option for a 24-month payment plan at $28.96 per month with 0% interest. The page outlines the purchasing process, including quick delivery of the domain within one to two hours, and details the transfer procedure to registrars like GoDaddy. It also highlights customer testimonials regarding the ease and speed of domain acquisition through HugeDomains, emphasizing the 30-day money-back guarantee and secure shopping experience. The resource clarifies that only the domain name is included, with hosting and web design services needing to be sourced separately.

This article describes the design and simulation of a multiple dipole antenna for the HF band, using the software MMANA-GAL. The antenna will be designed to operate in the 10, 20, 40 and 80 m bands

Ameritron QSK 5 PC mod for AL80B

An Antenna Mast Idea for a VHF/UHF antenna

Located in Port Richey, Florida in Pasco County, West Central Florida just Northwest of Tampa.

Over 480000 products with an illustrated online catalog

75m Mobile Texas Bugcatcher Loading Coil Measurements

St. Louis Repeater runs four repeaters in the St. Louis Metro Area, including two with autopatch capability.

This is a concept paper, not a constuction article. There are too many variables to propose a one size fits all design. However, this paper should give you the basic idea how to do it

kv5r 2 meter antenna

Article explaining electronic network of low pass filters

An SSB radio for the HF bands will be presented. Featuring 12 to 20 Watts of output power (depending on DC supply), full DDS frequency generation, covering 6 major frequency bands (1.8, 3.5, 7, 14, 21 and 28 MHz) within the short wave amateur radio spectrum. The rig also features colored LCD and front panel backlight.

Modeling compact 160 meter antennas, inverted L, half wave dipoles and linearly loaded dipole

How to design narrowband bandpass filters

Experimentig magnetic loop antennas for VHF and HF by M0UKD

Schurr Morsetasten, morse code keys and paddles manufacturer in Germany

In this article the author provides some guidelines on how to solve a common problem when stacking different types of yagi antennas on the same mast, limiting the effects on gain and radiation pattern of both antennas

HIDEXA Dedicated To The Pursuit Of Worldwide DX

Cambridge, Ohio

22 Different Wire Antennas for the 160 Meter Band, Random Length Radiator Wire, delta loop, loop antennas, off-centered antennas, sloper, dipoles, Z antenna, Zepp and Clothesline Antennas

Live Police and Fire scanner feeds from Albion PA, Erie County PA USA.

A Batwing Antenna Design Challenge

Federation of Chilean Radio Clubs. Awards and contest of FEDERACHI News about Dx in Chile

The mission of the HDXA is to encourage DX activites in Eastern Nebraska and Western Iowa. The HDXA is a ARRL Affiliated Club with members promoting & sharing DX information and experiences.

Newest ARRL westcoast convention. Features fox hunt, banquet, speakers, VE testing, swapmeet, many prizes.

An unconventional antenna family, the VHF/UHF Zigzag Dipole Antennas. Design, theory and practical construction, transformation and balancing with a half wave balun.

CREST Communications REACT Team #4252 has been an active member of the community for almost 30 years and is one of the largest REACT Teams in the United States.

An comprehensive article on 40 meters antenna comparing vertical height to the resulting gain

Eme operations from Anchorage, Alaska by KL6M ex AL7OB

Study of the Coaxial Dipole: Just how does this thing work.

MyAntennas.com offers standard and custom made multiband antennas, Baluns, Common Mode chokes and accessories. All products are designed and made by Danny Horvat, E73M an antenna design engineer formerly employed by Cushcraft Corporation.

An excel spreadsheet that in a really simple way checks how much to trim your antenna elements. Download the xls file and watch the presentation video include in this page

About basics of the horn antenna used for many rf microwave antenna applications.

tk7 is open source software designed for the ICOM IC-Q7 walkie-talkie. Though tk7 is intended chiefly for Linux, MacOS X, and BSD users, it will work on Microsoft Windows too.

The configuration of this antenna is a triangle with apex in the top of a very tall tree. The antenna is fed at a bottom corner using 450 ohm ladder line.