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Portable SSTV camera that takes a picture and transmit it with ham radio SSTV

The document titled 'Extending the Range of Your Handheld' by WG7S is a guide on how to extend the range of your handheld VHF UHF transceiver by using an external antenna. It provides information on comparing popular models, selecting the right antenna, and resources for amateur radio antennas.

"W2IK's Personal experience being the first responder at ""ground zero"" during the WTC 9/11 disaster."

Amateur radio shop in Barcelona Spain

N6GN's higher speed packet page for amateur radio digital networks

Ham radio blog dedicated to military radio equipment by EA3FOW

The International Amateur Radio Union

County Hunting is one of many amateur radio activities. There are over a thousand hams who have worked all of the US counties. Some have done it several times

SS232K - The simple and safe RS232 interface for Kenwood radios

Homepage of Hong Kong's elite group of DX'ers

Various configurations of the Z Match Tuner are tested for power efficiency over a wide range of antenna load conditions

This is a prototype of the WA4DSY 56KB RF modem. It is intended for use on amateur packet radio networks. The modem generates RF in the 28 to 30 mhz range and requires and linear transverter to convert the signal to a UHF or microwave ham band

World Castle award web site. The program goal is consolidation of radiohams of different countries for activation and popularization of historical objects all over the world.

The RoadTrek design presents some unique challenges to us hams. Here an example of a VHF and HF antenna installation on a VAN

How to replace the lithium battery in this ICOM radio

The Mt.Vaca Radio Club (Call sign K6MVR ) owns and operates repeater systems in and around Sacramento, California. The systems provide reliable coverage for mobile stations throughout the Sacramento Valley region and beyond to Modesto, Chico, the Sierras, and parts of the Bay Area.

Batteries for 2-way radios two way radio laptop camcorder UPS and more. Purchase batteries for your laptop two way radio ups digital camera from Battery Universe.

This homepage introduces Palau Rental Shack for the visitors who enjoy amateur radio in Republi of Palau.

Amateur radio delaer for major ham radio brands in Japan

Cannot record CW message, AFSK not working, tracking not working, meter peak hold, on Yaesu FT-920.

Ham radio frequency list consolidation software. The Ham Radio database can house a unlimited number of records. Holding frequency information from DC to Daylight. The Radio Scanner Database is designed to emulate a radio scanner. A 5,000 record table is provided and is organized by channel number.

The santa cruz county amateur radio club. activities, the newsletter short skip, events, links and other happenings about amateur radio.

The 10-minute, 25-second video demonstrates making a QSO via the VO-52 amateur radio satellite, focusing on real-time Doppler shift correction. It features Simon, 2E0HTS, operating a Yaesu FT-847 transceiver and a homebrew dual-band Yagi antenna, specifically a 10-element 435 MHz Yagi for uplink and an IO Loop for 145 MHz downlink. The video visually details the operator's technique for continuously adjusting the uplink frequency to compensate for the satellite's changing velocity relative to the ground station, a critical aspect of successful satellite communication. The demonstration highlights the practical application of Doppler compensation, showing the operator tuning the transmit frequency to maintain a stable received signal from the satellite. This approach contrasts with systems employing automatic Doppler correction or full-duplex operation, providing insight into manual frequency management for satellite passes. The video serves as a direct, observational guide for hams interested in LEO satellite operations, particularly those using non-tracking, manually tuned setups.

UK based online shop for cb and amateur radio equipment and related accessories

Extremely reliable FET preamplifier can handle several watts directly into either the input or the output without failure

Italian ham radio shop based in Milan

This scheme can be used to combine two antennas

Amateur Shortwave Radios Links and information,Also Swap Radio Groups Bearcat-scanner Drake Radios Hallicrafters and more

The purpose of this web page is to try to investigate some of the issues around ICOM IC-746PRO reported by many radio amateurs through out the world; and unfortunately not properly taken care of by ICOM.

A selection of alphabets used, particularly by ham radio operators, to spell out words

Whith more than 20 years of ham practicen SWL Thierry LOMBRY, alias ONL5183, has written several technical pages about ham activities, including propagation, radio perturbations, radioastronomy, DXing, QSLing, ham-spirit, review of material and more. This very interesting website is completed by a large French section devoted to amateur astronomy illustrated with vivid colors pictures.

Ham radio site devoted to classic collectible amateur and military radios, featuring vintage ham radio color photos and commentary, free downloadable manuals and pamphlets and links for ham radio hobbyists.

Enhanced SSB Audio (ESSB) is a specialized operating mode that extends the capabilities of traditional Single Sideband (SSB) voice transmissions. This presentation by K4QKY delves into the technical aspects of ESSB, discussing its advantages and the ongoing debates within the ham radio community regarding audio quality and bandwidth usage. ESSB aims to provide clearer and more natural-sounding audio, which can enhance the overall communication experience for operators. The presentation covers various topics, including microphone selection, audio processing techniques, and the importance of proper equalization. It also addresses the controversies surrounding ESSB, such as the potential for interference and the debate over whether it strays too far from traditional SSB practices. By understanding these elements, amateur radio operators can make informed decisions about their audio setups and contribute to discussions about the future of SSB operations.

Speakers for Amateur Radio, 2-Way Radio, Shortwave and Scanner listening

Radio Remote Control is a complete remote control system for Amateur radio.

Adventure Radio, articles and reviews. This site has a whole host of ham related information.

A family oriented Amateur Radio club in the Los Angeles area.

An interesting article on how to make copper cactus J-Pole antennas

1500 watts PEP output from a Kenwood TL-922 amplifier requires careful attention to parasitic suppression and component selection to ensure stability and longevity. This resource critically examines common modifications, often based on anecdotal evidence rather than sound engineering principles, that can degrade performance or introduce new issues. It highlights how replacing aged components often gets misattributed to the efficacy of unnecessary modifications, leading to widespread misinformation within the amateur radio community regarding amplifier stability. The article details specific, effective modifications for the TL-922, such as shortening anode-to-chassis and anode-to-grid paths to improve VHF stability and efficiency. It addresses issues like incorrect capacitor types in the tank circuit, inadequate grid grounding, and poor RF sheet metal design, providing practical solutions like adding direct ground connections for the plate tune variable capacitor. The author also discusses proper parasitic suppressor design, emphasizing the importance of lead length and component selection for optimal performance and harmonic suppression, contrasting these with less effective or detrimental 'magical suppression kits'.

The KP3AV Systems website offers a detailed listing of amateur radio repeaters across Puerto Rico, including operational frequencies and tones for VHF and UHF bands. It features sections dedicated to digital modes like DMR and C4FM, as well as information on FRS, GMRS, and MURS. The resource also includes articles on emergency communications protocols and provides access to Spanish-language manuals for various radio equipment. Recent content covers the new open-source FT2 mode for WSJT-X Improved, upcoming 60-meter band frequency allocations and power restrictions effective February 13, 2026, and discussions on 2-meter contacts with Desecheo Island from Puerto Rico. The site also presents U.S. amateur radio band plans and highlights local contesters like Manuel WP4TZ, offering practical insights into portable operations and contest participation.

Open source software designed to control and program the Japan Radio Co. NRD-545 receiver.

The Ukrainian Contest Club (UCC) The Ukrainian Amateur Radio League (UARL)

Dds data- communication Data and Tele-Communication Solutions: UMTS GSM GPRS Telemetry programmers Adeunis RF systems, antennas, radio transmission modules, oscilloscopes GPS and coax cables dealer in Holland

The Receiver Test Data resource is a detailed review database focusing on the performance metrics of various radio receivers. The methodology involves rigorous lab measurements, often adhering to standards such as the ARRL RMDR (Reciprocal Mixing Dynamic Range) and BDR (Blocking Dynamic Range). Specific test equipment and protocols are utilized to assess parameters like noise floor (dBm), AGC threshold (uV), and LO noise (dBc/Hz). For example, the _Icom IC-7300_ is evaluated with a noise floor of **-133 dBm** and an LO noise of **-141 dBc/Hz**, providing insights into its performance under different operational conditions. The resource includes a wide range of models, from the _Elecraft K3S_ to the _Yaesu FTdx-101D_, each tested for dynamic range, sensitivity, and selectivity. The data is sorted by key metrics such as third-order dynamic range and phase noise limitations, with RMDR values calculated by subtracting 27 dB from LO noise figures. This structured approach allows users to compare different receivers' capabilities, focusing on technical specifications and performance outcomes in various scenarios. DXZone Focus: Review Database | Lab Measurements | -133 dBm | ARRL RMDR

Ground Plane - 1/4 wave vertical, J-Pole, 3 Element Yagi Beam and simple antenna supports

H.A.R.C. Radio club in in Phila. Pa. area

Located about 25 miles south of Boston, MA, near the City of Brockton.

Information and news about Amateur Radio in Scotland

Learn how to start using ham radio satellites for your DX contacts, PDF presentation by Dave Long