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Anyone attempting to work DX on Top-Band 160 Meters, soon learns of the need for a good receiving antenna. This is a 160 meter 8 element receiving array.

1AT917 Daniele Homepage

easily design your cable, pick connectors and cable, print drawing, get immediate quote and place order, all online.

HX-B5i five band HexBeam installation

Comparison of several UHF antennas by DF9CY

A complete review of Icom IC-706 review published in 1999 by QST

All Band HF Doublet for operation over all HF bands including 160m.

Australia's largest online database of VK email & URL's. Home of the AAR Netring and VK Classifieds. Repeater lists, maps and more...

The antenna is a vertical dipole, around which four parasitic elements are forming a circle.

XPWare offers support for AEA, Kantronics, SCS/Paccomm and Hal controllers. The program also offers full transceiver control for most of todays HF radios and support DX Cluster monitoring. No more supported and developed by author. Now freeware.

Schematic for Yaesu FT-857 CAT interface

J-pole designs, for 50 to 450 MHz by WA6ESC

Gap Titan DX Antenna manual. This is an enhanced version of the common Gap Titan DX Manual document you can download from other sites. This manual is in PDF Format.

JIM, N0UQZ TS-2000 review

Transverter for 70MHz, a project by G3XBM

Shortwave radio reviews ar swling.com

Ferrite Toroids. Iron Powder Toroids. Ferrite Beads. Split Cores. Cable clamp-ons. Balun Cores. W2FMI Baluns and Ununs. Inductive components for EMI Suppression and RFI Suppresion, power supplies, HAM radio.

English version of the Yaesu FT-7800 operating manual

BIRD RF power measuring, new and used, HENRY RF power amplifiers (used HF amps), TOHTSU coaxial relays, SAMLEX power supplies, RFI chokes reduce interference, Parts parts, tubes, Used amplifiers, radios, antennas and accessories, Los Angeles, CA.

Progress in Design of Extremely Short Transmitting Antennas Short and still efficient, how is that possible? By Juergen Schaefer, DL7PE author of the MicroVert antenna concept. The MicroVert introduced in this document is an extremely short and hardly visible short-wave antenna with outstanding radiation properties

The TIC ringrotor offers operators the ability to have true On-the-Tower control of single or multiple antenna arrays for a full 360 of rotation

FDLog, a Python-based freeware application, addresses the challenge of synchronized logging for multi-station Field Day operations. It facilitates real-time data sharing across a wireless network, enabling operators to monitor band status and active transmitters at a glance. The software's input system is optimized for minimal keystrokes, streamlining the logging process during intense contest periods. Key features include database synchronization over a wireless network, ensuring all connected computers maintain identical log data. FDLog also incorporates a time synchronization function, designed to keep client programs within a second of a designated master machine, mitigating issues previously encountered with NTP. This internal clock sync can be optionally disabled if not required by the operating setup. Developed initially on Windows 2000, FDLog has demonstrated compatibility with _Linux_ and _macOS_ environments, though some font rendering issues may occur on the latter. The program assists in preparing the ARRL Field Day entry form, simplifying the submission of contest results. User feedback and ARRL rule changes drive ongoing development, with a discussion list available for community support and input.

A project for a homemade multiband Hexbeam antenna for 10, 12, 15, 17 and 20 meters

Rhombic antenna definition and articles by answers.com

Data Management Software for the RadioShack PRO-99 Race Scanner

Slot antennas explained

One specific challenge in the KazShack, operating Single Operator Two Radios (SO2R), involved sharing a K9AY receive antenna between two transceivers without direct RF connection or manual feedline swapping. The solution, detailed in this project, adapts the **W3LPL RX bandpass filter** design to split 160m and 80m signals, feeding them to separate radio inputs while maintaining isolation. This approach also addresses the issue of strong broadcast band interference from a nearby 50KW WPTF transmitter on 680kc. The construction utilizes T-50-3 toroids and NP0 ceramic capacitors, built in a "dead bug" style on copper clad board. Each band's filter coils are identical and resonated to the desired frequency using an MFJ-259 antenna analyzer. A single DPDT relay, controlled by a remote toggle switch mounted on an aluminum panel, facilitates quick band switching between radios, simplifying low-band operations. While some signal loss is noted, the expected lower noise levels from the receive antenna are anticipated to compensate, potentially reducing the need for constant volume adjustments during toggling between transmit and receive antennas.

Simple inexpensive program that allows L-C filters designed by PCFILT or S/FILSYN which are to be built using air wound inductors and single layer capacitors cut from alumina or duroid substrate materials

For radio amateurs seeking compact and efficient antenna solutions, particularly for restricted spaces or noise reduction, HF loop antennas present a viable option. This resource compiles several articles from the ARRL, detailing the theory, design considerations, and practical construction of various loop configurations. Topics include small transmitting loops, receiving loops, and multi-band designs, often emphasizing their performance characteristics such as directivity, bandwidth, and impedance matching. The collected articles provide insights into the comparative performance of different loop geometries, such as circular versus square loops, and discuss the impact of conductor size and tuning methods on efficiency. Practical applications are explored, including their use in portable operations, stealth installations, and urban environments where noise mitigation is critical. The content often includes construction diagrams, parts lists, and performance data derived from modeling or field tests, enabling hams to replicate or adapt the designs for their specific operating conditions.

Solves antenna matching problem with two phased antennas. Stacked rotary beams are popular. However, connecting two 50 Ohm antennas together presents some problems.

A simple delta loop antenna antenna for the six metre amateur radio band

SFFMA 147.000 Repeater audio By KG4LXH

Dealer for Icom America (LMR/Marine/Amateur accessories) and Expert Electronics (SunSDR MB1) US dealer.

The SignaLink has been used with virtually every radio available, but the radio that is heard mentioned most often is the Yaesu FT-817

Applying for a vanity callsign has become significantly streamlined, with the W5YI-VEC now facilitating online applications. This process allows hams to secure a personalized callsign from the FCC with remarkable efficiency, often seeing their new identifier granted in as little as **18 days**. The ease of access to this service represents a notable improvement for operators seeking a unique callsign. The resource outlines the straightforward steps involved, primarily directing users to input their current callsign to initiate the application. This direct approach simplifies what was once a more complex bureaucratic procedure, making it accessible to a broader range of amateur radio operators. For those interested in personalizing their on-air identity, the _W5YI-VEC_ online system offers a practical solution. It leverages digital platforms to expedite the application, reflecting modern advancements in administrative processes.

This is a 6 band receive only filter designed to protect your receiver front end and provide 45dB reject at the stop bands. This is a 6-band receive only filter designed to protect your receiver front end and provide 45dB reject at the stop bands. Stop band reject may be limited by the relay isolation. Worse case isolation is at 28 MHz or 35 dB or better. Relay K3/K8 protects the filter during transmit via the PTT line. A 25-50ms delay must be used between transmit and PTT. Do not rely on your radio to provide adequate delay with out using the PTT. You logging software must be set to allow a delay between PTT and time of 1st transmit. This filter will not work with VOX or QSK keying as you will damage the filter.

F5DQK repairing and swr measurement tests of a Cushcraft R7 Antenna

A simple D-Star keyboard to keyboard chat application for Windows by NJ6N.

Fractal antenna for 28 Mhz band by AG1LE

Conversion of Zetagi HP201 SWR wattmeter for HF Amateur Bands by G8ODE

The IC-746PRO is a great rig. But it has a few reliability issues, especially with the earlier-production units. This article addresses four problem areas:. IC151 on the RF Unit. Driver circuit on the PA Unit. HRX-muting circuit on the CTRL Unit. Predriver on the PA Unit.

HF Forward Power & Return Loss (SWR) Meter

A five element quad antenna for 144 MHz DIY Project. This 2 Meter 5 Element Quad antenna was modeled using EZNEC, with a boom from a UHF TV antenna and CPVC pipe for spreaders. Constructed for 146MHz, it exhibits a gain of 10.7dB and an impedance of 75 ohms. Real-world results surpass the HT antenna, reaching over 20 repeaters up to 75 miles away. The design, costing around $10, employs simple tools for assembly.

YAESU Distributor for Greece, Cushcraft, Maldol, Diamond, Surveilance and CCTV equipment

Digital APCO 25 talkgroup and scanning information. Includes information on fire, RFS, SES, ambulance, police, emergency and rescue services.

A portable 4 elements yagi antenna for 70 MHz by yu7ef

We offer uniden radio scanners and radio scanners mobile ,base station antennas ,low prices,free shipping in the U.S.A

Portable Base Systems, Mast Clamps, Aluminum Tubing

June 2003 RadCon review of te Yaesu FT-857 in pdf format. Need login to yahoo group.