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Manufacturer & distributor of Vacuum tubes and vacuum capacitors. -
Here is a well documented plan of a 20m-10m compact magnetic loop antenna. Article includes lots of pictures and technical details published by KP4MD -
PVRA Repeater Club has repeaters throughout Connecticut. -
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This article contains notes on installation of a Roger Beep for an Icom IC7000 transceiver for use with a Heilsound Traveller headset. -
This free program calculates the location of any locator. It calaculates the distance, azimuth, longitude and latitude between two Maidenhead locators. Converts longitude/latitude coordinates to Maidenhead locator Converts Maidenhead locator to longitude/latitude coordinates -
A homemade 10 element Yagi Beam Antenna for 50 Mhz by Rod Mackintosh, a NBS Yagi on a 13.2 metre boom. -
A home made dipole antenna for 10m, 6m, 4m bands made with two sections of 450 and 300 Ohm ladder lines, cut to achieve acceptable SWRs on all bands -
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. -
This homepage introduces Palau Rental Shack for the visitors who enjoy amateur radio in Republi of Palau. -
According to wikipedia a software-defined radio is a radio communication system which uses software for modulation/demodulation of signals -
TM-241A RX/TX mods The TM-421 a is capable of transmitting from 136 to 174 MHz when the following modification is performed -
Amateur radio delaer for major ham radio brands in Japan -
Extremely reliable FET preamplifier can handle several watts directly into either the input or the output without failure -
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. -
Kenwood TS-570 mods at mods.dk -
An online morse game that can be used both to learn receivind and trasmitting morse code -
Ever need a way to estimate the amount of wire to add to or remove from a center-fed wire dipole antenna to achieve resonance at a desired frequency? This article help to determine correct wire lenght. -
Only 2x 10ft wide, performance similar to full-size dipole, covers whole band with SWR better than 1:1.2. -
Speakers for Amateur Radio, 2-Way Radio, Shortwave and Scanner listening -
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. -
This scheme can be used to combine two antennas -
IV3GFN modification and restore of an HeathkitSB220 -
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 system consists of a pair of Morse practice oscillators connected by a piece of two-conductor cable. Pressing the key on one unit produces a sound in both units by Peter Parker VK3YE - -
A spanish commercial windows PSK Software, demo version is available by EA1CUI -
Italian ham radio shop based in Milan -
UK based online shop for cb and amateur radio equipment and related accessories -
Radio scanning resource site for scanning enthusiasts in the new jersey and new york area. -
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80-meter peilontvanger / receiver includes printed circuit sample and list of components -
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Pictures of Yaesu ft-9000 at mods.dk -
Far East Broadcasting Company (FEBC) - Manilla, Philippines. -
Ideas and notes on designing a SO2R radio shack room. Includes lots of radio shack pictures used by K8ND as ideas to plan his new radio shack, with contesting in mind. -
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An open collaborated project for creating base libraries and applications to allow the passing of information from the host computer to the D-STAR radio and vice versa. -
Decode Slow Scan TV (SSTV) on your iPad, iPhone and iPod Touch by Blackcatsystems -
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A 2 element Narrow Diamond Loop Array for 40 Meters by VE3VN -
An interesting article on loading short vertical monopole antennas, representing six different methods. Base loading, Center Loading, Top Loading, Continuous loading, half and half loading and capacitive top loading. -
Distributor of aluminum and a manufacturer of finished aluminum products. Pierce Aluminum offers a diverse inventory and distributes a complete line of sheets, coils, plates, bars, structural shapes, tubes, pipes and extrusions in the most varied alloys and sizes possible -
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A simple portable VHF ground plane antenna project used for ARES activities -
West mountain radio, Useful electronic hobbyist products, RigBlaster and RIG Runners products, Waukesha, WI. -
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JL is a free contest logger written entirely in Java. Run under Windows, Linux, Solaris, and MacOS X by W1JQ -
Exaustive shortwave dx and tech resources for BCLs. -
A selection of alphabets used, particularly by ham radio operators, to spell out words -
