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VK2KFJ amatuer radio information pages, including packet radio, six metres, radio modifications, local repeater lists.

by Steve Hicks N5AC and Jim Boehner N2ZZ

Have you problem with your RG cables ? This page describes a smart antenna box using an RG-cathode for 3 antennas. The remote control needs just a simple wire and the GND for remote-control

This document describes the DIFFERENCE of mode HAM to the official broadcast DRM standard

The _Egyptian Amateurs Radio Association (E-ARA)_ provides a directory of its members, detailing callsigns such as SU1AL and SU1ER, along with their full names and QSL routing instructions. Each entry typically includes a postal box or street address in cities like Giza, Cairo, and Port Said, facilitating direct QSL card exchange. Specific entries indicate QSL via home call for operators like SU1BH (A71BH) and SU1DZ (9K2DZ), while others, such as SU1MR and SU1SR, route QSLs through SU1ER. The list also contains details for operators with international home calls, including SU2RS, who QSLs via OE6EEG. This resource serves as a basic callbook for the Egyptian amateur radio community, offering essential contact information for local and international hams seeking to confirm contacts or establish communication.

W5PC is an ARRL Special Services Club, ARES/RACES/SKYWARN in Weatherford, Parker County, TX

ON7YD slow CW and DFCW TX program for Windows, works with Argo. By Rik Strobbe

Radio Club ON4GDV, home page of Gang De Verviers, located in Belgium

ARRL Laboratory Expanded Test-Result Report Kenwood TS-570D

One another useful Table for the HAM's practice.

40 meters band 5 watts transmitter, uses a 6L6 with a 6X5 rectifier and a 0D3 voltage regulator tube on the screen.

WI ham club partecipate in Field Day, sponsers an annual Swapfest held in August, and provides various repeaters.

This map is done by Mike, KB8SSH

The South Brevard Amateur Radio Club is based in the Melbourne, Florida area and provides volunteer communications services to the public and provides a common organization for amateur radio operators in the south Brevard County area to operate under.

In this article, the author discusses the importance of good transformers for Beverages, especially for common-mode isolation. The author recommends #43 ferrite for the transformer, and provides the turns required for different core types. The author also recommends using lower permeability ferrites for better performance at lower frequencies.

Here are some lengths and spacings for various direct connect beams.

KC9L PSK is a free PSK31 program based on AE4JY’s PSKCore DLL. It supports 5 RX channels, full duplex operation, and more. Even if it's development has been dismissed, is a good tool for windows 95/98 pc.

SSTV pictures received from MIR via Slow Scan TV, by WB8ERJ Mike.

Modification to connect a frequency counter to a MFJ-9406 50 MHz transceiver by ON6MU

Accessing local public service communications often requires specific frequency data, and this resource provides extensive scanner frequency lists for the Greater Cleveland area. Originally compiled by Russell Imburgia, _N8RI_, these compilations were previously hosted on the now-defunct Greater Cleveland Hamnet BBS. The data is presented in two distinct formats: one sorted alphabetically by city and another organized numerically by frequency, allowing users to quickly locate specific channels based on their preferred lookup method. These lists are noted for their thoroughness in covering local public safety, business, and utility communications within the region. While the primary lists are copyrighted by N8RI, permission is granted for non-commercial reproduction, provided the copyright notice remains intact. The page also directs users to an external frequency database maintained by Jon Anhold, _N8USK_, offering an additional avenue for frequency information.

Schematic anc PCB for a fox hunting receiver for 80 meters band

LoTW and eQSL export utility for Windows allows you to export your LOTW and eQSL marked qso's from Logger32 or an existing ADIF file. This program has been discontinued by author in favour of L32 LogSync.

SV2AEL QSLs and flags gallery, from almosto every country, include country falg

Tips to homebrew your own HF traps using aluminium wire and doorknob capacitor

Hidden transmitter hunting, often called fox hunting or Amateur Radio Direction Finding (_ARDF_), presents a unique challenge for radio amateurs. This resource details the _PicCon_ controller, a specialized device designed to automate the transmission of signals for such events. It integrates with a standard radio transceiver, functioning similarly to a packet radio TNC, by controlling the Push-To-Talk (PTT) line and injecting audio tones or modulated CW Morse code into the microphone input. The _PicCon_ unit is field-programmable using DTMF tones received via the radio, storing all settings in EEPROM for power-off retention. Its compact design and low power consumption (a few milliamps from a 7-35VDC source) make it suitable for remote deployment. An onboard LED indicates operational status, and a push-button allows manual start/stop of transmissions without DTMF. Typically supplied as a kit, _PicCon_ includes a PCB, components, and a comprehensive manual (available in HTML, RTF, and PDF formats). The kit provides a six-conductor interface cable, but users must supply radio and power plugs due to varied configurations. Byon, _N6BG_, developed this controller, which is available from the Byonics website.

A 4 AMP / 18V regulated power supply schematic, designed by _ON6MU_, provides a detailed circuit diagram for constructing a robust power source. The design focuses on delivering a stable 18-volt output at up to 4 amperes, crucial for powering various amateur radio equipment. This resource presents a clear visual representation of component interconnections, including rectifiers, filter capacitors, and voltage regulation stages, essential for DIY enthusiasts building their shack infrastructure. The schematic's clarity facilitates understanding the power flow and component roles within the circuit. This circuit design offers a practical solution for hams needing a reliable 18V supply, potentially useful for driving specific transceivers, amplifiers, or accessory circuits. While specific performance measurements or comparisons to other designs are not detailed, the schematic itself serves as a foundational blueprint. Builders can adapt or modify the _power supply_ to suit their particular needs, such as integrating overcurrent protection or fine-tuning the output voltage with adjustable regulators. The straightforward presentation makes it accessible for those with basic electronics knowledge to assemble and troubleshoot.

A site dedicated to portable operation in the great outdoors!

The resource presents a detailed schematic for constructing a dual-band vertical antenna, specifically designed for operation on the 2-meter and 70-centimeter amateur radio bands. It illustrates the physical layout, critical dimensions, and component placement necessary for successful replication. Key elements such as the radiating elements, phasing sections, and feed point are clearly depicted, providing a visual guide for radio amateurs undertaking a homebrew antenna project. The diagram specifies the lengths for the VHF and UHF sections, indicating how these elements are integrated to achieve dual-band functionality from a single coaxial feedline. It also implies the use of common materials readily available to most experimenters, focusing on simplicity and effectiveness in its design. The visual format of a GIF image ensures direct access to the construction details without requiring extensive textual interpretation. This schematic serves as a practical reference for hams interested in building a compact, efficient vertical antenna for local and regional FM communications, offering a proven design for immediate implementation.

General ham radio related items

Web site for March 2000 Clipperton Island DXpedition

Includes some schematic diagrams

This simple and cost effective interface circuit is designed for use with any ICOM amateur radio equipment with CIV interface

Notes on Icom IC-756Pro II and IC-746Pro by I0GEJ

Diplexer is a passive device, a special filter circuit that seperates 2 different bands, not to be confused with the duplexer that usually separate 2 different frequencies on the same band.

Similar to Tiny 2 but this three element direct connect antenna utilizes a reflector and a director to achieve gain.

Iulian Rosu YO3DAC / VA3IUL wire ham radio antenna panoramic with sample drawings

The DL4MEA Power Meter

Beacons recorded audio files by kl7fdq

Printed.it Tipolitografia Bonanno QSL printing service by IT9EJW sicily.

Presents a QRP AM/CW transmitter project specifically designed for the 10-meter band, utilizing a crystal oscillator and a collector-modulated AM oscillator. The design employs a 2N2219(A) transistor in a Colpitts configuration, generating 100 to 350 mW of RF output power depending on the 9-18 Volt supply voltage and modulation depth. Frequency stability is maintained by a 28 MHz crystal, with fine-tuning possible via a Ct1 trimmer capacitor for approximately 1 kHz adjustment. The resource details the RF oscillator stage, implemented with a 2N2219 NPN transistor, emphasizing frequency stability and low power dissipation. It also covers the amplitude modulation stage, managed by a 2N2905 PNP transistor, which impresses audio information onto the carrier. Selective components (C3, C4, C7, C5) enhance voice frequencies within a +/- 5 kHz bandwidth, and modulation depth is controlled by R2 and R3. The project includes a 3-element L-type narrow bandpass filter (Ct3, L3, C10) to suppress harmonics and ensure a clean output signal. The project provides a complete schematic diagram, a comprehensive parts list including specific capacitor, resistor, and inductor values, and construction notes for the coils (L1, L2, L3). It also offers practical advice on enclosure requirements, suggesting an all-metal case or a PVC box with graphite paint for RF shielding. Operational parameters such as current draw (27mA@9V to 45mA@16V) and input impedance (50 Ohms) are specified, alongside guidance on antenna matching and the importance of a valid amateur radio license for 10-meter band operation.

All about homebrew, antennas, accessories for shack, digital tecniques and more..

Frequency coverage: 3.75 MHz to 4.00 MH transceiver for 75 MHz band

Information on equipment manufactured by the Bird Electronic Corporation, wattmeters, RF loads, switches by I0JX

QRG_DB is a database for the Palm OS computer to control a Yaesu FT-817 Transceiver via the CAT interface

A switchable Magnetic Transformer for Transmitting for various impedances

conversion of low band VHF AWA 25M-1 carphone onto 6 metres.

Triband DK7ZB VHF Yagi antenna for 6 m, 4 m and 2 m with a single feedpoint

The _Italian VHF Beacons_ resource provides a detailed listing of active and QRT amateur radio beacons operating across VHF, UHF, and SHF bands within Italy. Each entry specifies the beacon's callsign (e.g., IQ1SP/B), operating frequency (e.g., 144.411 MHz), QTH locator (e.g., JN44VC), effective radiated power (ERP) in watts, and antenna configuration (e.g., Big Wheel, 4x Dipole, Yagi). This data is crucial for radio amateurs involved in propagation studies, equipment testing, and long-distance (DX) communication on these higher frequency bands, offering fixed signal sources for monitoring. This compilation, last updated in October 2005, serves as a historical snapshot of Italian beacon activity. For instance, it lists several 144 MHz beacons with ERPs ranging from **0.1W** to **10W**, and higher frequency beacons such as I8EMG/B on 1296.880 MHz and I3EME/B on 24192.132 MHz. The inclusion of QRT (Quiet Radio Teletype) status for many entries indicates the dynamic nature of beacon operations over time. Users can utilize this information to identify potential signal sources for band openings or to calibrate their receiving equipment against known transmissions.

Belgian question pool by on1dht

This is Wimpey site,a full featured Ham Radio,CB,short wave police scanner and much more ARS KA4PNV