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How Vacuum Tubes Really Work. Vacuum tubes rely on hot cathodes emitting electrons and a plate attracting them to create current. A grid in between controls the current flow, enabling amplification. This article explores the nitty-gritty of how it works, including how cathode type, temperature, and electrode spacing affect the process. It explains the physics behind electron emission, space charge, and amplification factor, offering a deeper understanding than the basic principles.

K0GKJ project of a copper tube slim jim antenna for two meter band

The Northern Ohio DX Association (NODXA) operates a voice repeater on 147.36 MHz with a +600 kHz shift, utilizing the club callsign W8DXA. The organization provides an award program for contacting its members and offers DXCC and Honor Roll patches to recognize member achievements. NODXA publishes a monthly newsletter containing DX information and meeting minutes, with a recent brochure and membership application dated May 2024. The club actively promotes DXing, allocating a portion of its finances to support DXpeditions, and several members have also financed their own expeditions. The NODXA roster was last updated in June 2015, and a list of supported DXpeditions was revised in June 2024. Tedd Mirgliotta, KB8NW, serves as the club president and is the editor of the OPDX Bulletin, a widely distributed internet and packet cluster resource. Meetings are held on the first Monday of each month at Amici Italian Restaurant & Bar in North Royalton, Ohio, located at 13000 Royalton Road, near the intersection of Route 82 and W.130th Street. The club leadership includes Dennis Stuber, K8LBT, as Vice President; Glenn Williams, AF8C, as Secretary; and Mary Michaelis, N8DMM, as Treasurer.

The HF horizontal loop has been around for many years now. This article includes a YouTube video and discusses the reasons for looking at this antenna, its design, and its installation. There are some on-air comparisons against three regular double bazooka (coax) dipoles and the Par SWL End-Fed antenna.

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 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

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 DIY aluminium push up mast project. The final mast includes 7 aluminium tubes with 6 cable clamps

Review of the Heil PR-781 with a Yaesu FT-950 includes youtube movies and a nice product review

The build was an experiment to see if a tube receiver could be stable enough to receive digital shortwave radio broadcasts. The tube acts as both an oscillator and mixer, so the receiver is a type of direct conversion receiver.

100 Watts and a Wire is a ham radio talk show was originally launched as an audio podcast on June 22, 2015. Today, you can see the show on YouTube. It features topical conversation, interviews and ham radio news. You can listen anytime by subscribing wherever you get podcasts.

Learn how to enhance the performance of your Diamond V2000A antenna by optimizing the length of the radials. Discover a cost-effective method to create improved radials using simple materials like aluminum tubes and bolts. Explore the benefits of this modification for 6m band, unlocking triband capabilities and better SWR. Find out how a ham radio operator from Europe successfully upgraded their V2000 antenna and achieved impressive results. Save money by DIY-ing your radial enhancements instead of purchasing expensive replacements.