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Analysis of N3UJJ installed antennas using the AIM4170b Antenna Analyzer

Special logging program, optimized for mobile, portable, and field operations. This software exports data in the ADIF which then may be imported into your general logging software, or online services. Currently available for Android.

Review of Logikey K-5 Keyer

100 W output RF amplifier for 10 meter band project by W4NFR

A vertical antenna project for the 7MHz made with some spare parts. Based on a broken 20 foot fishing pole, it is based on a good ground system made with radials and a capacitive hat done to increase the global radiation resistance of the antenna. A custom loading coil is also included in this project to perfectly tune the antenna to the CW portion of the 40 meters band.

Distributor of ESD, kapton tapes, high temperature tapes, esd wrist straps, ionizers, ground cords, grounding devices, ESD gloves, esd finger cots, esd workstations, esd rubber bands, esd binders, esd bags, anti static glove, esd rubber bands, no clean solder paste, water soluble solder paste, finger cots, esd mats

PDF File of the IC R7100 communication receiver service manual

K6FRC/B 6 m beacons website

List compiled by N4LCD with description of main frequency usage

Lot's of vintage radios from 30's

Ham Radio cartoons of common situations

This test circuit is easy to duplicate, and demonstrates the extreme voltages that appear in an amplifier when the load is improper for the amount of drive power applied.

ScopeIIR: an Infinite Impulse Response (IIR) digital filter design tool for Windows. It designs high-order IIR filters based on analog filter prototypes, and can design lowpass, highpass, bandpass, and bandstop filters.

Page dedicated to the Yaesu FT-920

With spectrum analysis of beacon signals, it's possible to see features relating to various propagation phenomonen.

On line shop in Greece for amateur radio products, electronics, DAB Radio and GPS. Dealer for popular amateur radio brands, heil sound, kenwood, MFJ and more

Receive and listen to FM and AM radio broadcasts on your browser or ChromeBook using an RTL2832U-based USB digital TV tuner.

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

W-CODE is a professional digital mode decoder system capable to decode many digital signals on HF, VHF/UHF, SHF and SATELLITE bands.

Demonstrating the construction of a short dipole antenna tailored for the 60 meter band, this resource provides detailed instructions for radio enthusiasts with limited space. The design incorporates inductive loading using two inductors (L1/L2) made from PVC tubes, allowing for effective operation on 5 MHz. The antenna consists of 12 meters of wire, divided into four sections, with specific dimensions and materials outlined for optimal performance. Results from users indicate that this antenna can significantly enhance DXing capabilities on the 60 meter band. Feedback from operators suggests that while the design is effective, adjustments may be necessary based on individual setups, such as coil diameter and wire gauge. Many users report successful construction and operation, with some experimenting with variations to improve resonance. The practical application of this antenna design has led to successful contacts and improved signal quality, making it a popular choice among 60 meter band operators.

Technical Correspondence, QST, July 1990 - Why even "perfect" phased array element currents don't produce perfect patterns.

QRQ or Copying CW over 70 wpm

A Flemish association of shortwave listeners

Club Russian Robinson for amateurs interested in radio communication from polar stations, islands and maritime mobile objects RRC founded in 1993. Goals are consolidation of radio amateurs, operating now or operated in the past on islands, drift-ice research, arctic and marine stations, signing their personal callsigns or as participants of DX-peditions.

ScanBC is British Columbia's online radio scanning community

This useful coax tester allows you to screw the PL-259 onto the tester to get a GO/NO GO status. When the LED lights up- you have a short circuit.

Sizes of wire as compared to their gauge American Wire Gauge by W8HDU

This group is being formed to support those radio enthusiasts that already have experience in SWL, Scanners, or Citizen Band/FRS radio that would like to know more about becoming a Ham.

Transmission Line 75 ohm to 50 ohm Transformers

Design and manufacture application specific microwave and RF amplifiers, upconverters, downconverters and multifunction assemblies.

Super Antenna Systems for HF - VHF - UHF Portable Stealth Mobile Base Backpack EmComm Ham Radio antennas

From 1973 we work in the communication system on HF, VHF, UHF, SHF for P.M.R., OM and broadcasting.

Introduction to the use of clusters and Packet Radio, hardware, settings and commands by ON4SKY

Comparison of FT-1000D FT-736R FT-817 FT-847 FT-897 IC-765 Orion TS-2000 Spectral purity of a continous carrier, of a SSB and CW signals

Illinois Cook County, police scanner includes Chicago Fire Dispatch channels (North, South, and HazMat)

Amateur Radio Club in Edinburgh. Founded in 1949 with twice monthly meetings and a range of activites including talks, DF hunts, vists and contesting.

The function of the XPhase is based on the fact that the interfering signal, received by an auxiliary antenna, is added phase-shifted to the signal received from the main antenna. When the phase-shift is more or less 180°, the interfering signal is canceled out.

G0UPL QRSS receiver inspired by I1DFS receiver

Experimenting vertical wire antennas for 40 and 20 meters supported by balloons resulting in excellent gain in RX and good overall performance against horizontal dipole

DMRconfig is a free utility for programming digital radios via USB programming cable. DMRConfig support several DMR transceivers by TYT, Baofeng, Anytone, BTECH, Zastone, Radtel.

DX Century Club First post-WWII Countries List

Practival project that contains two isolation transformers, one for AF from the tranciever to the line in on a soundcard, and one from the audio out of the soundcard back to the mic / data input of the radio. Both of which are variable inside the interface via two preset resistors.

Homebrewing a Gamma Match to tune yagi antennas

Broadcasts national and international programs locally and to all world regions in over 30 languages on mediumwave FM, TV, RealAudio/TV and on shortwave.

The **Solarcon A99** vertical antenna, a half-wave over a quarter-wave variable mutual inductance design, primarily serves the 11-meter CB band but also finds use on 10 and 12 meters for amateur radio operators. Its simple construction, consisting of three fiberglass sections and a 16 AWG radiating element, makes it an accessible option for new operators or those seeking an easy-to-install base station antenna without complex mounting requirements. Despite claims of 9.9 dBi gain being widely considered exaggerated, and a manufacturer rating of 2000 watts power handling often viewed with skepticism (with 300 watts suggested as a practical limit), the A99 maintains popularity due to its low cost and ease of deployment. It typically tunes to a 1.2-1.3 SWR out of the box, requiring minimal adjustment via its two tuning rings. Its high angle of radiation allows for effective local communication even when mounted at low heights, such as 8-10 feet off the ground. However, the A99 is known for significant RF bleed-over issues, particularly when operated with higher power or mounted close to residential electronics. While its internal design is often described as cheap, the antenna exhibits remarkable durability, frequently lasting a decade or more in various weather conditions. Its affordability and straightforward setup continue to make it a go-to choice for many radio enthusiasts.

"KC2DVQ ""CB Os Piratas"""

A selection of radio collectors from all around the world interested in collecting, repairing, restoring, trading, selling parts, radio magazines, advertising collectibles, old records and technical talk.

Wheel antenna informations by The Olde Antenna Lab

Batteries and chargers