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Linear Amp UK specializes in the design and production of high-quality linear amplifiers, offering models for HF, VHF, and UHF amateur and commercial applications. The company emphasizes nearly 30 years of experience in crafting each unit, ensuring robust performance and longevity. Their product line includes amplifiers engineered for a 100% duty cycle, promoting continuous and reliable operation across various modes. The amplifiers feature solid, dependable designs, ensuring quiet and effortless performance during transmission. Each unit is hand-built to stringent standards, reflecting a commitment to durability and operational stability. All products are CE approved, confirming compliance with European safety and environmental directives, and come with a standard two-year warranty, providing assurance to operators. Key specifications often include coverage for 1.8-30MHz (WARC bands), 50MHz, 70MHz, and 144MHz, utilizing tubes such as 811, 572, 811A, 572B, GS35, GS35B, 8877, 3CX1500, and _3CX1500A7_ in their designs.

Yaesu transceiver vx-170 water proof test

Tubes, military manuals and surpluss

Manufacturer & distributor of vacuum tubes for all applications, we guarantee best service,pricing & delivery and we also guarantee sameday shipping.

Here's a tale of early '70s vacuum tubes, mainly from the viewpoint of amateur radio.

A web site dedicated to collecting and restoring antique crosley tube raidos. pictures and descriptions of antique crosley tube radios from the twentiew, thirties, forties, and fifties. radio advertising from the twenties, thirties, forties, and fifties. tube box art. links to many antique radio related sites.

Tencom, located near Toledo, Ohio is dedicated to the pultrusion of fiberglass composite products. This includes solid rods, conductor rods, tubes and a variety of custom profiles.

N9TEW is supplier of vacuum tubes for ham,audio & antique radio purposes.

Supplying over 2000 different vacuum tube types, valves, grid caps, sockets and capacitors. It is easy for Antique collectors, Ham radio operators, audio enthusiasts, broadcast enthusiasts and amateur radio hobbyists to buy, sell and trade vacuum tubes, electron tubes, audio tubes, valves, grid caps, sockets and capacitors

Demonstrating tuning and operation of the ameritron al-811h in this Youtube video

D-star videos, introduction to d-start, real examples on YouTube

Expert, affordable antique radio repair, all home and auto vacuum tube radios, located just south of Atlanta Georgia

Clevaflex is a manufacturer of flexible wound tubing that can be used in a variety of applications. our unique manufacturing process allows tubes to be designed and built with a multi-ply convoluted wall contour that creates a permanently bonded tube.

Homepage for SND Tube Sales

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.

A noncommercial site operated by Max Robinson and dedicated to passing on and preserving knowledge of vacuum tube circuits and techniques.

Collecting and history of CRT tubes and physics instruments

Tube and transistor radio collection

Homebrew Tubes/LDMOS amplifiers, Antenna, accessories, adventures in 9Q, DX, UN missions, Contests, and more.

A Virtual Museum of Vintage Radios from the Golden Era

1500 watts of RF output on the 70cm band requires robust amplifier design, a challenge addressed by this project featuring the GS-23b / 4CX1600U Svetlana tube. The resource details the construction of a high-power UHF amplifier, providing insights into component selection and layout necessary for stable operation at these frequencies and power levels.

Ea2id demonstration video of the Ameritron AL-811H in spanish

Presents Eagle Stainless Tube & Fabrication as a certified distributor specializing in various tubing products essential for antenna construction and other amateur radio projects. It details their offerings, which include aluminum tubes in fractional, metric, and heavy wall specifications, alongside stainless steel bar stock in round, square, and flat profiles. The resource highlights the availability of a diameter sizing chart and direct contact options for specialists, indicating a focus on providing specific material dimensions and expert support for custom fabrication needs. The company emphasizes its role as a supplier of raw materials, crucial for hams engaged in DIY antenna builds or structural components for their shacks. Their inventory supports the precise mechanical requirements often encountered in radio frequency engineering, where material strength, weight, and corrosion resistance are critical design factors for outdoor installations. The site primarily serves as a product catalog and contact point for sourcing specialized metal tubing and bar stock, providing technical specifications and material grades relevant to robust amateur radio infrastructure.

Yaesu vx-8r prototype quad-bander on display at the 2008 dayton hamvention. Youtube video

Excellent article and guide to choose the best RF power amplifier that fit your needs by ON4SKY

Penta Laboratories is a Manufacturer and Distributor of vacuum tubes, capacitors and electron tubes for Broadcast, Industrial, Marine and Avionics applications worldwide.

This transmitter was first constructed in 1987 and provided the author with his first real rig, capable of distances of more than about 100 metres.Use a 6GV8 tube.

Video on Baofeng uv-3r menus

This video will provide a foundation for understanding how power amplifier circuits work. If you are new to High Frequency Power Amplifier Circuit Design, this is the place to start.

Home Brew a 4-1000A RF power amplifier project by W4NFR

The **TransWorld Antennas TW2010 Traveler HF Portable Vertical Antenna** assembly video provides a visual walkthrough for deploying this popular portable HF antenna. It details the step-by-step process, from unpacking components to final setup, which is crucial for operators preparing for field day operations or DXpeditions. The video focuses on practical aspects, showing how to connect the various elements and secure the antenna for optimal performance. Operators often seek clear assembly instructions for portable antennas like the TW2010 to ensure quick and correct deployment in diverse environments. This visual aid helps clarify potential ambiguities found in written manuals, illustrating the proper handling of the antenna's radial system and telescopic elements. The video serves as a valuable resource for those aiming to achieve efficient operation with the **TW2010 Traveler** in a portable setting. Understanding the assembly sequence can significantly reduce setup time and prevent common errors encountered during initial deployments.

A very useful video that explains how to program the TYT MD-2017 radio. From software download, firmware, codeplug and how to manually configure settings and how to program memories

A video about secret listeners ham radio voluntary interceptors during ww2 an extract from The Secret Wireless War DVD

This article describes an alternative to water as the cooling liquid for amateur radio vacuum tube power amplifiers. This cooling system is designed for adequate vacuum tube cooling, reasonable cost, and very low maintenance. By K8CU

A video domonstrating how fast can be the setup of a Trans World Antenna

Worldwide sellers of vacuum tubes and electron tubes for audio, radio, and industry

A site mainly concerning British Portable Valve Radios of the 1950's

Boatanchors in Russia. Old tube radiosets.

A mini Dxepidition to Piel Island on 24th/25th of May 2008 by the CQ CQ Portable group and the call sign will be GB0PIA.

German vacuum tubes dealer

Elecraft KX2 tips and tweaks about how to improve your receive audio on the Elecraft transceiver

160-10 Meters 1500 Watt Amp - W4NFR

Youtube video by PR7VX using AMTOR to test performance

A Personal Museum of Military Radios - Spy Radios - Tubes by Antonio Fucci

How to navigate FlexRadio PowerSDRs Pan Adapter

The Vacuum Tube FAQ by Henry Pasternack

K8CU technical topics article about high voltage breakdown tester necessary for testing of any high voltage components like vacuum tubes, high voltage capacitors, vacuum relay

Homebrew Tube Projects, Vacuum Tube Data, Articles From Old Handbooks

SJ2W Contest Station, antenna for the 160 meter is a 39m vertical. This 160m antenna consist of 29m of WIBE tower sections with an insulated base and 10m top tube.