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VHF-UHF receiver covers from 25 to 800 and 900 to 2000 MHz in the following modes: AM, AM-W, FM, FM-W, FM-N, USB and LSB

Independent Radio Club's D-STAR repeater system

28,227.5 MHz, from JN55VF first "IW" prefix beacon "ON THE AIR" activated from Italy

Provide communication service primarily to the public safety organizations

Northern Michigian Amateur Radio Club Inc. was founded on the principles of providing services to the local area Amateur Radio Service Groups and to public.This group of license amateur radio operator provide Emergency Communication during the time of weather related,disasters and man made emergencies.

OL5Z - contest station from JN89AR

A Multiband Slinky Coil for the PAC-12 portable Antenna, can be used also as a dual PAC-12 dipole by James Bennett

ham radio clun in Vermont USA

All about RTTY, including audio samples, rtty software, video exaples and rtty related links

Where abilities and disabilities become possibilities

M0AUW's Amateur Radio blog specialising in Cobweb and Moxon antennas

TX on 28.289MHz since 1992

Balanced and Unbalanced Systems

Solomon Islands H44G/ Temotu Islands H40T - March 2013 by DL7DF

This tutorial covers an introduction to RF, wireless, and high-frequency signals and systems, includes explaination of what is RF, why operate at Higher Frequencies, Frequency Shifting through Frequency Mixing.

Personal blog dedicated to mobile amateur radio operations

W9TY, the Metro DX Club of South Suburban Chicago, Illinois, USA.

The Potomac Highlands Amateur Radio Club, a non-profit association in West Virginia

A very frequently updated blog of building a large contest station in northern Sweden

The Tri-pole antenna, a clever modification of a standard dipole, allows for dual-band operation by integrating a third element. This design effectively shortens the overall dipole length by 10 to 20 percent, simplifying antenna rotation and offering a compact footprint. KK4OBI's article delves into the operational principles, using a 6 and 10-meter Tri-pole as a primary example, and provides comprehensive instructions for constructing any Tri-pole antenna within the 6 to 15-meter range. Key to the Tri-pole's performance is its off-center feed, necessitating a common mode choke at the feed point for optimal tuning and reduced noise. The author outlines a methodical approach to determining element dimensions, starting with a vertical element frequency calculated as 0.47 times the sum of the desired upper and lower band frequencies. This calculation, along with K-values derived from trend lines, guides the initial lengths for the horizontal arms, demonstrating how a 10m-6m Tri-pole can achieve a total horizontal length 78% shorter than a conventional 10-meter dipole. Tuning and balancing are critical, with the article detailing adjustments to arm lengths and the vertical element to achieve balanced SWR values, as validated through 4NEC2 simulations. Radiation patterns are analyzed at various elevations, showing gains around 5.7 dBi and favorable take-off angles for DX contacts. Construction details specify aluminum tubing dimensions, U-bolts, and an SO-239 connector, emphasizing the importance of a ferrite-based choke for wideband operation.

Download the latest firmware for the tyt md-380 VHF transceiver

Valon Technology designs and manufacturers low cost, reliable radio frequency products such as RF Synthesizer modules, RF Frequency Dividers and Phase Gain Detectors. Main markets are military/defense, test engineering, radio astronomy, research centers and universities

Mount Greylock Expeditionary Force VHF/UHF Multiop Contesting Page

Clicks are most problematic when we try to copy weak signals next to moderately strong signals. How to recognize them, and how to identify clicks problems

New and Used Industrial Generators, specialize in power generation equipment including over 100 new and used engines and generator sets for the industrial, marine, and petroleum industries

Claremore, OK

September 24th 2012 till October 5th 2012 3D2C DX Pedition

APRS related links and resources by KA9VNV

The structure of this dual band VHF UHF antenna is very simple. It consists of two identical square loops, whose sides measure a quarter wave, connected together at the ends. A project by I5NZR

The **Luis Trenker Award** is an amateur radio operating award established by the Amateur Radio Club Ladinia to honor the director and author Luis Trenker from Val Gardena, South Tyrol, Italy. To qualify for the award, HF stations must achieve five confirmed QSOs with each of five specific Alpine countries: Italy (with specific prefixes like I1, IK1, I2, I3, IN3, IW3, IV3), France, Germany (with DOKs A, C, T, U), Switzerland or Liechtenstein, and Austria (with prefixes OE2, OE3, OE6, OE7, OE8, OE9). A single QSO with a member of the Amateur Radio Club Ladinia can substitute for the five required Italian QSOs, with members' QSL cards bearing a special rubber stamp. VHF/UHF stations have a simpler requirement, needing only one confirmed QSO with each of the five Alpine countries. SWL stations are eligible under the same conditions as transmitting stations. All contacts must be valid after April 12, 1990. Applicants must submit a list of contacts, certified by two OMs or a club, to the Amateur Radio Club Ladinia in Ortisei, South Tyrol, Italy. The award manager is IN3PGS Karlheinz, and the club official is IW3AQL Luca.

Project by N9SSA

Northern Tasmania Amateur Radio Club

The Pamlico Amateur Radio Club (PARC), founded in 1994 and incorporated as a 501(c)(3) non-profit, provides a community hub for amateur radio operators in the Inner Banks region of North Carolina. Affiliated with the _ARRL_ since 2011, PARC supports local ham radio activities and offers resources for those living or traveling near the Pamlico River. The club maintains an active presence, participating in events like Field Day and offering various operating opportunities. Members engage in diverse aspects of the hobby, from DXing to emergency communications, fostering skill development and camaraderie. The club's focus extends to public service, providing communication support when needed within its operational area. PARC's commitment to the amateur radio community is evident through its long-standing presence and continuous engagement, reflecting over **30 years** of service since its establishment.

Number stations are shortwave transmissions from foreign intelligence agencies to spies in the field of foreign countries.

DXpedition to Kiritimati (Christmas Island) 28 September to 26 October 2011

TCARA has been active in Michigan's Tuscola County for over 20 years.

The Nechako Radio Club was formed in the summer of '93 to provide a common meeting point for the local area amateur radio operators.

How to use the hacked firmware on the MD-380. Tools for working with codeplugs and firmware of the Tytera MD380,

Our ideas about HF baluns have changed dramatically in recent years. The focus today is very much on suppressing unwanted common-mode RF currents, to reduce both the received noise levels and the risks of causing interference on transmit.

The Northwest Amateur Radio Society was established in 1985 and serves amateur radio operators in the suburban FM 1960 area NW of Houston.

Read all the key details about Vacuum Tubes or Thermionic Valves that provided the foundations for today's electronics technology.

A Primer On Mics For Ham Radio. Difference between dynamic and condenser microphones, microphone plugs and differences in kind of microphones available on the market

Communications solutions for Business, Utility and Industrial applications including data phones wireless RF

Issued to any licensed radio-amateur or SWL who submits proof of radio contact with stations working form fortresses

This is a Solid State Amplifier Project. It uses 4 MRF150 MosFet Power Transistors. The Power Supply Voltage is 50 VDC at 21.5 Amp. The max power available is 1,075 Watts. The Efficiency is about 65% +/- and runs Class AB Solid State.

A ham radio blog primarily focused on newbies and those interested in the hobby. Covers a wide area of subjects that might be of interest to Amateur Radio operators, and material that can be used to study for the Amateur Radio tests.

TO3X Log Online

PSK Reporter,is a powerful tool for monitoring your FT8, JT65 or PSK signals around the world. But, even if you are not transmitting on any of these modes it can still be a great propagation tool for determining which bands are open and to where in the world signals from your area are being heard.