Search results
Query: j mast
Links: 423 | Categories: 7
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News and general information about Oromia and the Oromo people Ethiopia -
Manufactures and sells coaxial connectors, coaxial adapters, coaxial cables, attenuators, directional couplers, fiber optic connectors, fiber optic adapters, fiber optic cables, coaxial switches, terminators, twinax connectors and cables and tools. -
Amateur radio courses on-line for Canadian Basic & Advanced amateur radio exams -
Scanning railroad communications in the toronto area -
This project details the construction of a **full-sized 40-meter vertical antenna**, born from a renewed interest in 7 MHz operation and a desire for improved effectiveness over simple dipoles. The author, K5DKZ, initially focused on VHF experimentation, which provided an inventory of aluminum tubing and fiberglass spreaders for this endeavor. Before this vertical, K5DKZ utilized an 80/40 meter inverted-vee trap dipole and a 40-meter broadband dipole, but now primarily uses a pair of full-sized, phased, quarter-wave verticals spaced 35 feet apart for serious 40-meter work. The construction involves a base-heavy design for stability, using a 44.5-inch section of 1-1/4 inch steel TV mast driven into 1-3/8 inch aluminum tubing, insulated by a 105-inch section of Schedule 40 PVC pipe. The assembly reaches 31 feet, close to the 32 feet required for a quarter-wavelength on 40 meters, with fine-tuning achieved by winding wire onto a fiberglass spreader. The design is explicitly presented as a foundation for a two-element 40-meter Yagi beam, outlining modifications like substituting aluminum for steel in the base and using an inductive hairpin match for the driven element. The article also discusses tuning considerations for a large 40-meter beam, noting the 100 to 200 kHz upward frequency shift when raised, and suggesting methods for installation on a tower. The author emphasizes the cost-effectiveness and good performance of the monopole approach, especially when multiple verticals are needed. -
Los Angeles County Disaster Communications Service a public service organization using Amateur Radio -
Guide to ground mounting antennas, notes on efficiency, elevated installations, metal towers and masts, other mounting schemas, moble homes and rv, lightning protections, artiche by Bencher -
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There are pages with info on the code, pictures of morse keys, a couple of downloadable tutor programs, mystery keys etc. -
Showcasing a specialized product line, Advanced Receiver Research presents a comprehensive catalog of **low noise preamplifiers** and microwave **Gunnplexers**. The offerings span a broad spectrum of radio frequencies, from VLF, LF, MF, and HF bands up through VHF, UHF, and microwave, catering to diverse applications including amateur radio, commercial installations, and military systems. Their product range includes mast-mount preamplifiers, inline attenuators, power dividers, and various coaxial components. My own experience with similar low-noise front ends for weak-signal work on 2 meters and 70 centimeters underscores the critical role such components play in maximizing receiver sensitivity, especially when chasing distant DX or engaging in EME. The detailed product descriptions and technical specifications provided on the site allow operators to select the optimal preamplifier for their specific band and noise figure requirements, essential for improving signal-to-noise ratio. The site also lists specialized products for unique applications like Nuclear Magnetic Resonance (NMR) and Studio Transmitter Links (STL), demonstrating a depth of engineering capability beyond typical amateur radio fare. This breadth of offerings, coupled with clear ordering and warranty information, positions Advanced Receiver Research as a key supplier for high-performance RF components. -
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Christian radio station 'The Overcomer' providing broadcasts via shortwave. -
Heathkit Amateur Radio Repair, parts, and manuals. Amateur radio equipment sales and service. -
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W5AC is the Texas A&M University Amateur or "Ham" Radio Club. This club, founded in 1912, is one of the oldest university radio clubs in existence. -
G7LRR aerials's that work in small Garden of 20ft x 15ft with a 60ft mast -
Martin Francis NDB K9AY mast project, with pictures and homebrewing details -
Antenna dealer, antenna masts, towers, mounts, antenna rotators, steppir and optibeam inrad dealer -
Making portable pperations easier, N1GY present a different way to make a tilt-base and mast -
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. -
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An interesting article on how to make copper cactus J-Pole antennas -
QST Magazine said, We have the hardest T-Hunts in the Country -
Assisting applicants in obtaining the various FCC-issued Amateur and Commercial Radio Operator licenses. -
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A dipole antenna for 7 MHz support for this antenna is fiberglass military mast -
The California Polytechnic State University Amateur (Ham) Radio Club (CPARC) has a long tradition of communications service on campus and in the community of San Luis Obispo. The club was founded in 1947, making the Cal Poly Amateur Radio Club the second oldest club on campus -
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Sams continues the tradition with the publication of new manuals every month, covering the latest in Televisions, including HDTV, Projections TVs, and coming soon, LCD monitors. -
Radio Budapest is the external service of Hungarian Radio Company Limited, the public service broadcasting organisation. -
Repair & Restoration information in UK -
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W9DC North America Amateur Radio checkpoint for IOTA Islands on the Air and WLH World Lighthouse award applications and award instructions; Island and lighthouse award links for international radio operator activities -
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BRATS amateur television, amateur radio, and public service, Baltimore Radio Amateur Television Society -
Vacuum Tubes and Radio Tubes Our specialty. We carry over 5,000 radio and vacuum tubes in stock every day and we ship world wide. Tubes for industry, music, ham radio, the audiophile. -
Informations about RADIO 101, constructing home brew transmitters, pirate radio, pagers, salsa, latin-dances, tango, Ecuador, Quito, Ukraine, Kiev, Ireland and more. Themen: Sendetechnik, Sender, Piratensender, Schaltpläne, Baupläne, Magnetkarten, Irland, Ukraine, Ecuador, SMS, Pager etc -
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KU6S SBARA South Bay Amateur Radio Association -
Activities, meetings and more -
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Demonstrates the capabilities of CW_Shark, a dedicated 32-bit Windows application for Morse code operations. This software facilitates the analysis, decoding, and encoding of CW signals, providing hams with a versatile tool for various aspects of amateur radio communication. It supports four distinct modes: Decode Only, Keyboard QSO, Straight or Paddle Key QSO, and Straight or Paddle Key Practice, catering to different user needs from passive listening to active keying. Operators can utilize the Decode Only mode for signal analysis, while the Keyboard QSO mode allows for text-based interaction. The Straight or Paddle Key QSO mode offers a direct interface for traditional keying, enabling real-time communication. For skill development, the Straight or Paddle Key Practice mode provides a structured environment to hone Morse code proficiency. CW_Shark integrates essential functions for CW enthusiasts, supporting both learning and active participation in Morse code exchanges. Its focused design aims to assist operators in mastering and enjoying the art of _CW communication_. -
Accurate calibration of your receiver and sound card is necessary for good results with the weak signal modes in use at LF. Modern receivers with master oscillators that are synthesized to provide all conversion frequencies greatly simplify the process. This article describes a method of making the necessary measurements and adjustments to an ICOM R75 receiver and a sound card, using the ARGO software -
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