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Your world-wide source for Heathkit, Drake, Collins and Dentron amplifier parts & upgrade kits

Electronic Kits and parts

Design for a very low cost 6-digit frequency counter module using of the shelf components

KJI Electronics, Inc. has been serving the Amateur Radio Community since 1978. An authorized Icom and Kenwood dealer, we carry many other manufacturers of HAM radio equipment. Located in Caldwell NJ, we service the radios we sell.

Decoding and data analyzer software

A simple online folded dipole antenna calculator

Offers Scanners, Shortwave, Wide-Band receivers, accessories from Icom, AOR, Sangean and Grundig.

Baluns for amateur and commercial radio.

Amidon Associates, Inc. provides a comprehensive selection of inductive components, including ferrite toroids like the FT-50-61 and FT-50-43, alongside iron powder toroids such as the T50-2. These cores are frequently employed by radio amateurs for constructing baluns, ununs, and RF chokes, essential for impedance matching and common-mode current suppression in the shack. The company also supplies ferrite beads, split cores, and cable clamp-ons, which are critical for mitigating EMI and RFI in various electronic systems. Beyond core materials, Amidon offers mounts, bobbins, tunable inductors, and specialized wiring components like PTFE tubing, catering to diverse project requirements. They also provide custom winding services, allowing for tailored solutions in both amateur and commercial designs. Top-selling items include the BN-61-202, a common choice for broadband transformers, and the FB-43-801 ferrite bead, often used for decoupling and parasitic suppression in RF circuits. Amidon further expands its inventory by distributing products from other manufacturers, including Gowanda Electronics and Leader Tech, Inc., broadening the range of components available for hams and engineers.

Online helix antenna designer, calculate size of helix antennas online

Dealer for Icom America (LMR/Marine/Amateur accessories) and Expert Electronics (SunSDR MB1) US dealer.

YAESU Distributor for Greece, Cushcraft, Maldol, Diamond, Surveilance and CCTV equipment

We offer uniden radio scanners and radio scanners mobile ,base station antennas ,low prices,free shipping in the U.S.A

Examines the historical landscape of "boat anchor" amateur radio equipment manufacturers, focusing on the technical innovations and market dynamics that shaped the industry from the pre-WWII era through the transition to SSB. It details the origins and key product lines of prominent U.S. companies like _Collins Radio Company_, _Central Electronics_, and _Barker & Williamson_, highlighting their contributions to receiver and transmitter design. The resource contrasts early AM technology with the advent of SSB, explaining the circuit changes required in receivers and the complete rethinking needed for transmitters. It discusses the impact of military contracts on company survival and the eventual shift towards smaller, self-contained transceivers. Specific examples, such as the _Collins R-390/URR_ receiver and the _Central Electronics 100V/200V_ broadband transmitters, illustrate the engineering prowess and design philosophies of the era, offering insights into their operational characteristics and enduring appeal among collectors.

ABRA Electronics is a trusted partner of thousands of OEMs, schools, hobbyists, repair shops and Government Organizations. We stock everything from electronic components to test instruments to educational kits.

Bob's Electronics serve a wide market of customers throughout the Midwes, supports brand names such as Bendix King, ICOM, Relm, Uniden, Antenna Specialist, Antennex, Cushcraft, DB Products, Maxrad, Sinclair, and numerous others.

kenwood french web site

Yaesu Icom Kenwood CAT Interfaces. Isolated audio-DATA interfaces for ALL afsk DATA modes inc psk31 rtty sstv etc.

QRP and Electronic Kits manufacturer

Basic information on the folded dipole antenna

Alan yates vk2zay's ham radio website, homebrew construction, general electronics, high voltage experiments, amateur rocketry, and general geek stuff

The UK amateur radio licensing scheme features three distinct tiers: Foundation, Intermediate, and Full, each granting specific operating privileges. For instance, the **Foundation Licence** permits a maximum of 10 watts output power on most allocated bands, with restricted band access. The Intermediate Licence allows up to 50 watts, while the **Full Licence** grants access to the maximum UK legal power limits and all available amateur radio band allocations. UK call sign prefixes and formats provide insights into the licensee's class and the approximate issuance date. For example, M3, M6, and M7 prefixes with three letters denote Foundation Licences issued from 2002, 2008, and 2018 respectively. Intermediate Licences, often starting with "2E0" or "2E1" followed by three letters, were issued from 1991 onwards. Full Licences encompass a broader range of prefixes like G2, G3, G4, G0, and M0, with varying letter counts indicating different historical license classes and issuance periods, such as G3 plus three letters issued between 1946 and 1971. Special prefixes like GB are reserved for repeaters, beacons, data mailboxes, and special event stations, with specific numerical sequences (e.g., GB3 for repeaters, GB7 for data repeaters/mailboxes) indicating their function. Optional prefixes such as GC, GD, GI, GM, and GW denote specific UK countries (e.g., Wales, Isle of Man, Northern Ireland, Scotland, England) and can also signify club stations.

German magazine about Ham radio, electronics and Computers.

Ham radio antennas and electronics, specialized in 1/2 wave dipole, OCF dipole, windom, full wave loop, end fed, inverted L, portable end fed antenna, long wire, SWL antenna, fan dipole, multiband dipole, G5RV and military antennas.

AP Communications CB and Amatuer Electronics Sales

Kenwood German web site

Presents a collection of articles and project logs from ST2NH, focusing on various aspects of amateur radio, including satellite communications and DIY electronics. The blog details experiences with tracking the _International Space Station_ (ISS) and other orbital assets, providing insights into the operational challenges and successes encountered in these specialized modes. Documents several homebrew radio projects, offering construction details and discussions on circuit design for various amateur radio applications. Content often touches upon software-defined radio (SDR) implementations and related software tools, demonstrating practical applications for hams interested in digital signal processing and flexible radio architectures. Explores topics relevant to QRP operation and general amateur radio news, reflecting the author's engagement with the broader ham community. The blog serves as a personal chronicle of amateur radio activities and technical explorations.

Shure incorporated, microphones and audio electronics

Chinese manufacturer of Software Defined Radio for commercial, public and amateur radio market. Markers of H1 H1Plus H2 Q900 SDR transceivers

Canadian dealer, specializes in supply and installation of free-standing towers for commercial and amateur radio use. We also supply ham transceivers, antennas, rotors and accessories.

Manufacturer of led digital clocks, digital timers, countdown clocks, electronic kits, audio switches, binary clock, telegraph keys, and cool gadgets.

Ferrite rod antenna or aerial, a form of RF antenna that is widely used in RFID and transistor radio applications.

Italian shop offer a wide range of products for industrial or military surplus.

RF shop is an Australia online retailer of Radio Communications, Electronics, RF and Microwave component products.

A very basic guide to antennas concept. Explain the usage of dummy load, basic antennas like dipole o j-poles.

CB Radios, Marine, 2 way radios scanners and towers from Shawnee Mission KS USA

The basics of what is a discone antenna for wide band or bandwidth omnidirectional applications.

Antique radios and audio sold to collectors and dealers

Information and tutorials about all aspects of radio and electronics including propagation, ham radio, electronics, radio history, etc

The widest range of stocked components for the electronics, electrical and mechanical engineer.

Hobby kits and electronics, semiconductors, components, batteries, ham radio gear and more. The store sells a variety of electronic components including resistors, capacitors, and fuses. They also sell tools such as screw connectors and box cutters. Some of the featured items on the website are Nixie tube clock kits and battery holders.

Thousands of electronic and electro-mechanical parts and supplies

Australian dealer for UHF CB radios, Amateur Radio HF VHF Radios, GPS navigation systems, two-way radio, cordless telephones, radar detectors, marine electronics, amateur radio gear and many other consumer electronic products.

Helix antenna online calculator with match calculator

A 4 AMP / 18V regulated power supply schematic, designed by _ON6MU_, provides a detailed circuit diagram for constructing a robust power source. The design focuses on delivering a stable 18-volt output at up to 4 amperes, crucial for powering various amateur radio equipment. This resource presents a clear visual representation of component interconnections, including rectifiers, filter capacitors, and voltage regulation stages, essential for DIY enthusiasts building their shack infrastructure. The schematic's clarity facilitates understanding the power flow and component roles within the circuit. This circuit design offers a practical solution for hams needing a reliable 18V supply, potentially useful for driving specific transceivers, amplifiers, or accessory circuits. While specific performance measurements or comparisons to other designs are not detailed, the schematic itself serves as a foundational blueprint. Builders can adapt or modify the _power supply_ to suit their particular needs, such as integrating overcurrent protection or fine-tuning the output voltage with adjustable regulators. The straightforward presentation makes it accessible for those with basic electronics knowledge to assemble and troubleshoot.

Mailing list for people interested in building radio and electronics equipment from kits or from scratch. Frequent topics include shortwave radio receivers, construction techniques, and ham radio project.

SecondHandRadio.com provides a platform for the amateur radio community to buy, sell, and swap used, surplus, and obsolete electronics and electrical equipment. The site facilitates transactions for a wide range of items, including ham radio transceivers, test equipment, shortwave receivers, antennas, and vintage radio components like tubes. Users can place classified advertisements with photos at no cost, catering to individuals, radio clubs, and commercial dealers seeking to liquidate or acquire gear. The platform emphasizes ease of use with a straightforward sign-up process and no associated fees or commissions for listing or selling items. It positions itself as a primary resource for used electronics within the USA, fostering a direct connection between sellers and buyers without intermediary charges. The service supports various categories beyond amateur radio, extending to military radios and antique equipment, thus serving a broad spectrum of radio enthusiasts and collectors.

Wide bandwidth Trapped Verticals and rotary dipoles, baluns, 40m/80m wire dipoles and accessories from Australia.

Information on equipment manufactured by the Bird Electronic Corporation, wattmeters, RF loads, switches by I0JX

A simple simple sweep generator circuit design where the sawtooth is generated by the PNP transistor and a 555