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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. -
Designer and supplier of tower reinforcement systems to the wireless industry. -
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Amateur TV, Satellite TV Equipment, Broadband Via Satellite, Weather Monitoring -
G0HWC details and HTML files with images to build yourself a Ham Radio website. Get your Ham Web Site on the internet for free -
The MC3423 can protect sensitive circuity from power supply transients or regulator failure when used with an external "Crowbar" SCR. -
PDF file of the Ameritron ALS 600 with switching power supply review published on QST -
Inches and meters Javascript Wavelength Calculator allow to input a frequency in MHz and calculate wavelenght in several units considering also fractions of wavelenght and the velocity factor. Includes an usefull inch to meter converter -
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All about me, QSL's, Contest, IIA and IOTA's DXpeditions, cool links and much more -
Professional CB Radio Repair. Have repaired CB Radios and 10 Meter Radios for over 30 years -
KNLS English Service, this Is Alaska Calling! World Christian Broadcasting, Station KNLS, Anchor Point, AK USA -
Redesigning CDE rotator control meter scale for north-centered operation -
Refractive Index maps forecast for Europe -
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Server allowing operation of the Winkey USB by K1EL with any Linux program with UDP keyer capability. -
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The Auburn University ARC station gets its power from the sky -
W1AEX Audio settings and general observations -
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Since the beginning when a small group of Hams met to form a club in the southwest corner of Dallas County, it has always been known as SWDCARC or by it's full name, Southwest Dallas County Amateur Radio Club. -
Solving interference from television channel 11 on 144MHz transverters by Chris Cox, NØUK, G4JEC -
Ten-Tec Orion picture and specifications at RigPix -
Extending TX for the Kenwood TS-590s HF Transceiver -
First started in the early 80's by a small group of Hams that resided in Cle Elum, Washington. -
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beacon transmits on 10.368,850 MHz in the 3cm-band -
Transferring Radio Frequency Energy from Your Transmitter to Your Antenna by Don Keith N4KC -
DX Pedition to Glorieuses Island, july 2009 official website. -
This resource compiles claimed scores, often referred to as "rumor scores," for numerous amateur radio contests, providing a historical snapshot of competitive activity from 1993 through 2007. It lists entries for prominent events such as _CQWW CW_, _ARRL Sweepstakes_, _IOTA Contest_, and various _NAQP_ events, categorized by year and contest. Each entry typically includes the contest name and the month/year of operation, allowing users to quickly navigate to specific contest periods. The site also references the _3830 Web Page_ on Contesting.com as the primary submission portal for these claimed scores. The collection offers a unique perspective on contest participation and performance trends over more than a decade, preceding the widespread adoption of real-time score reporting systems. While not official results, these rumor scores provided early indications of top performers and overall activity levels for a wide array of HF and some VHF contests, including _ARRL 10M_ and _CQWW VHF_. The historical data can be useful for analyzing past contest popularity, identifying consistently strong operators, or simply reminiscing about earlier competitive eras in amateur radio. -
Dedicated to providing superior FM repeater service to Amateurs in the Washington, D.C. Metropolitan area. -
K1JJ presents a compilation of insights regarding vertical radial ground systems, specifically applied to 160m vertical arrays. The resource details 19 distinct observations and recommendations, emphasizing that ground radials primarily reduce ground losses rather than influencing pattern formation. It explains that RF current flows inefficiently through average soil, necessitating copper radials to create a low-resistance path back to the antenna base. The content suggests that **50-60 radials** are generally sufficient to achieve optimal efficiency, with diminishing returns beyond that number, and that radials should be laid on the surface for best performance. The discussion also addresses practical aspects such as wire gauge, installation techniques using 'U' shaped staples, and methods for connecting radials in multi-element arrays. It highlights the importance of radial length, stating that 1/4 wave radials are a crucial minimum, and that for 160m, radials should be at least _100 feet_ long. The resource critically examines the efficacy of elevated radials versus ground radials, noting that while a few elevated radials may suffice for VHF, HF applications, particularly on 160m, require extensive ground radial systems to efficiently collect RF currents in the near field. It also touches on the impact of radial systems on parasitic elements and the significance of symmetrical radial patterns for minimizing losses. Further practical advice includes wire type recommendations, proper soldering and weatherproofing techniques for radial connections, and considerations for integrating steel towers into the ground system. The author shares personal experience with installing 60 quarter-wave and half-wave radials under each of three in-line verticals, expressing satisfaction with the results. -
Club of Amateur Radio Operators with members from Indiana, Kentucky and Illinois. -
A general interest amateur radio club where all hams are welcome -
Combined 432 MHz High-Pass - 144 MHz Notch Filter By Bertrand Zauhar, VE2ZAZ -
A Comparison of most popular Amateur Radio Digital Voice Systems DMR D-Star System Fusion presented by W9HPX Roland at the Charlotte Digital Radio Group in a comprehensive article about Digital Voice -
FMI provides superior solutions in the design and manufacture of frequency control devices including Voltage Controlled Temperature Compensated Crystal Oscillators (VCTCXO), voltage controlled crystal oscillator (VCXO), Temperature Compensated Crystal Oscillators (TCXO), crystal clock oscillators, high temperature oscillators, surface mount and crystal oscillator products, phase locked sources and more. -
Synthetic guy ropes and accessories for antenna support systems -
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Operated by the amateur radio club RK3AWL, Zelenograd Russia -
DF9CY Softrock RXTX Software Defined Radio Transceiver (SDR) -
Serving Greater Waterbury -
Summary, tutorial about the basics of what is a waveguide and the basic waveguide theory. -
The CQ World Wide DX Contest records page details the highest scores achieved in the CQ WW DX Contest across various categories and years. It systematically lists records for both SSB and CW modes, segmenting results by entry class such as Multi-Multi, Multi-Two, Multi-Single High, Multi-Single Low, Single Operator High Power, Single Operator Low Power, Single Operator QRP, Single Operator Assisted High, Single Operator Assisted Low, and Single Operator Assisted QRP. Each record entry specifies the callsign, the operator's callsign in parentheses if different, the year of operation, and the total score achieved. The data is further broken down by individual amateur radio bands, including 160m, 80m, 40m, 20m, 15m, and 10m, allowing for granular analysis of performance within specific frequency segments. The page also includes records for the "ALL" band category, representing cumulative scores across all operational bands. The presented records span from 1948 to 2025, providing a historical perspective on contest performance. This resource also references other CQ contests like CQ WPX, CQ WW RTTY, CQ WPX RTTY, CQ 160, CQ VHF, and WW DIGI, indicating a broader context of contest record keeping. It explicitly states that late logs are not included in the records, ensuring data integrity. The page is maintained by the World Wide Radio Operators Foundation, Inc. -
Online shop for obsolete electronic components, tubes and semi-conductors
