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The total length of the inverted L is 240 feet, which is 7/16th of a wave length long. It has a 92 foot horizontal linear load section 1 foot above ground that terminates into a home-brewed parallel network tuner by KN4LF

An introduction to portable shortwave receivers and sw radio. What to look for in a good portable. Reviews of Sangean ATS505. Band info and frequecies.

Tuning control of the Yaesu FT-736R multiband VHF/UHF transceiver.

This free PDF file contains two Worldwide grid square maps. The first map displays the fields (first two letters of a maidenhead locator) while the second includes also squares (third and fourth digit) and it can be useful to determine what is your ham radio grid square. PDF file can be enlarged and scaled to A3 and higher dimensions.

This PDF document, authored by KT4QW in October 2004, details the construction and modeling of a dual-band, horizontally polarized hanging rectangular loop antenna for **10 and 17 meters**. The design, adapted from *The ARRL Handbook*, utilizes _NEC4WIN95_ software for scaling and optimization, targeting a 50 ohm feedpoint impedance. The resource includes a bill of materials, step-by-step construction instructions, and a discussion of the antenna's radiation characteristics. It presents NEC-generated elevation and azimuth patterns, comparing the loop's performance to a half-wave horizontal dipole at the same height and frequency. The 17-meter element is centered at 18.140 MHz for low SWR across the phone band, while the 10-meter element is centered at 28.500 MHz. Construction involves 14-gauge stranded copper wire and Schedule 40 PVC spreaders, with the total wire length calculated by the formula: Length in feet = 1005/MHz. The feedpoint impedance can be adjusted by modifying the rectangular aspect ratio. The document specifies hoisting the antenna to at least a half-wave above ground for testing. It notes that a balun was tested and found to have no measurable effect on SWR or radiation characteristics. A 2-meter scale model is presented to illustrate the physical design, and a "rotator" string is incorporated for directional adjustment up to 90 degrees.

Interesting review about active magnetic loop antenna Wellbrook ALA 1530 and 330S by ON4SKY

A coaxial cable tuneable magnetic loop antenna for 7MHz. This experimental antenna does not require a tuning capacitor

Eham members Yaesu VX-7R review

These inexpensive, easily built filters can be the buffer you need between the signals you want to hear and send and those you don't!

If you can't get on the air from home, the Internet may provide the answer. By Brad Wyatt, K6WR. Pdf File.

KN4LF article about a 1/4 wave fan inverted L antenna for 80 and 160 meters band

Yaesu's FT817 and Super Antennas MP-1 review by George Heron, N2APB

KR1ST, Yaesu FT-897 Noise blanker review

Why the G5RV is a good antenna on 75m and 40m

W1ZY's 40 Meter MOXON is the product of 9 months of experimentation. The final array is reversible and constructed from No. 12 insulated wire fed through two RF current baluns

The document details the optimization and construction of the _Maria Maluca_ antenna, a compact 6-band (20m-6m) directional beam. It presents a comparative analysis of shortwave antenna principles, highlighting the efficiency gains achieved by using an open feeder line and tuner as a resonant unit, contrasting this with the losses associated with traps or capacitive loads in multiband antennas. The resource specifically revisits an older South American 2-element design for 10, 15, and 20 meters, applying modern NEC-based software to develop a six-band version. Performance data is meticulously tabulated, showing impedance, free space gain, gain at 12m height, elevation angle, and front-to-back (F/B) ratio for each band from 20m through 6m. For instance, on 15m, the antenna achieves 5.1 dBd free space gain and 13.72 dB F/B ratio. The construction section provides practical guidance on element assembly using aluminum pipes and hose clamps, detailing the use of a heavy-duty glass fiber reinforced polyamide rod for electrical separation and bending strength. It also specifies the use of 450-ohm _Wireman_ line CQ 552 for the transmission line. The document includes diagrams for rod fixing, an air-wound balun, and a vertical elevation diagram for the 15m band, illustrating its DX qualification. It also discusses the antenna's suitability for portable and expedition operations, noting its compact transport dimensions (max 1.50m length, 12 lb weight) and quick assembly time (under 15 minutes). The author, Dipl.Ing. Helmut Oeller, DC6NY, is identified as a source for material kits.

A Compact size 80-10 m field day antenna offering a Low angle of radiation and very easy to build and set up

ARS repairs all major brands of Amateur Radio equipment (Icom, Kenwood, Yaesu, Alinco, etc.) in our Portland Oregon area service facility

eham FT-1000MP MKV review

Comparing two wonderful radios by S52ow

Adalet wireless document on antenna basics in a four pages pdf file

ON4VT SSTV and personal page, includes a large software review, introduction for beginners and webcams showing sstv on the net

This article reviews the proposition that a 4:1 current balun in the style of Guanella can be constructed with both pairs of windings sharing a common magnetic circuit.

Great resource wth reviews, articles, and other fun CB information.

Informations about Scannings, with frequencies, information about scanning, hardware and software reviews

An assortment of Amateur Radio-related technical articles written for the JUG, the newsletter of the Northern California Contest Club. Topics include unique but simple and useful radio modifications and accessories, and rig reviews.

Schematics and purchasing information for the Yaesu FT - 8x7 DIY Bluetooth CAT micro miniature interface done by YO3GGX

A delta loop antenna for 17 meters band include eznec antenna model file

Eham users review of Kenwood TS-2000

Built around a 1/2" pvc frame, Larry's 6 meter moxon antenna is made from #8 aluminum ground wire

Eham IC-718 reviews

The ICOM IC-7300 is a cutting-edge HF transceiver that has garnered significant attention since its release. This review, published by ARRL in QST, provides an in-depth analysis of its features, performance, and usability. The IC-7300 is known for its direct sampling technology, which enhances its sensitivity and selectivity, making it a favorite among amateur radio operators. The review covers various aspects, including the user interface, audio quality, and overall operational capabilities, providing valuable insights for both new and experienced hams. In addition to its technical specifications, the review discusses the IC-7300's performance in real-world scenarios, such as DXing and contesting. It highlights the transceiver's ability to handle weak signals and its versatility across different modes. The review serves as a helpful guide for those considering the IC-7300 for their station, offering a balanced perspective on its strengths and potential drawbacks. Overall, this review is an essential resource for anyone interested in the ICOM IC-7300 and its place in the amateur radio landscape.

A 2-way remotely operated HF antenna switch, based on an idea supplied by G3YEU

These pages are entirely devoted to the Kenwood TS570 series Transceivers. Specifications & Brochure, Pictures, Schematics, Reviews, Manual and Modifications.

Build yourself a postage stamp 40 meter wire dipole antenna that fits in a space a little over 20 wide and works reasonably well at low heights

Midland GXT-900 FRS/GMRS 30-Mile Range Two-Way Radio product review

By ON4CFC Pascal, describe how to build a Sperrtopf or Sleeve antenna for the 144 Mhz, PDF File by antennex

Instructions to modify the ICOM IC-7600 to extend reception and trasmission

A multi-band inverted-V dipole for portable operation by GM3VLB

The **ARRL Contest Calendar** presents a detailed schedule of upcoming amateur radio competitions, encompassing both ARRL-sponsored events and significant non-ARRL contests. It provides essential operational details for each entry, such as specific operating periods, eligible bands, and permitted modes, enabling contesters to plan their participation effectively. The resource also links to official rules, soapbox reports, and QST results, offering a comprehensive overview of past and future contest activity. Users can navigate through monthly listings to identify contests of interest, with direct access to detailed information pages for each event. The calendar serves as a central hub for contest operators seeking to confirm dates, understand exchange requirements, and review post-contest analyses. Its utility extends to both seasoned contesters and those new to competitive operating, providing a structured approach to contest participation. The platform integrates various contest-related resources, including links to **Contest Corral** entries for non-ARRL events, ensuring a broad scope of coverage. This aggregation of information streamlines the process of finding contest schedules and associated documentation, making it a practical tool for the amateur radio contesting community.

W4TI review the popular Yaesu FT 857 quadriband transceiver

Eham reviews of the popular Yaesu FT 847

A monoband yagi for 14 MHz a PDF article from 73 amateur radio magazine by AB4GX

FT-817 product review at eham.net

Maldol MFB-300 all band HF vertical antenna review by Steve Nichols

Schematic Manual of the 3 element Yagi antenna by ECO antenne

Antenna switch at K6XX

K6AER Yaesu FT-2000 review on eham

Portable magnetic loop antennas - G4TPH Mag-loop antennas Reviewed in PW and RadCOM, Both QRP and QRO, Portable. The only Magloop on the market that is fully portable

John talk about Yaesu VX-3 as an interesting upgrade from VX-2, other reviews cover Kenwood TH-D7 TH-6A Icom-91A Kenwood TM-D700A Yaesu FT-817 and Icom IC-7000