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Eham members product reviews of Icom IC-746

D-PRS is GPS for ham radio. Includes DStarTNC2, javAPRSSrvr, DStarInterface, and TNC-X. D-PRS is the act of converting Icom GPS information generated by Icom D-STAR radios in GPS mode into TNC2 fomatted APRS strings.

ON6MU 4 A power supply using a BDX33

The 9A3MR contest QTH rental provides a fully equipped amateur radio station for DXpeditions or radio holidays on Murter Island, Croatia. The station features a Drake TR7 transceiver and a 16-meter tower with a rotator, suitable for various HF operations. Accommodations include a four-room apartment and a studio apartment, both within 200 meters of the beach, offering amenities like parking and a barbeque area. This QTH is located in Jezera, a fishing village with local stores and restaurants within a five-minute walk. While Murter Island itself does not qualify for IOTA due to a bridge connection, the Kornati Islands National Park (IOTA EU-170) is only 10 nautical miles away, with daily tourist tours available. The Krka National Park is also accessible by car, approximately 25 km distant, providing additional recreational opportunities.

You can make your own 2-meter "rubber duckies" that will likely perform much better than many commercial units.

A combination of Fldigi and Flmsg for portable devices running Android used for NBEMS

Optimising a typical G5RV antenna by VK1OD

The Collins TRC-75 autotune linear amplifier, owned by JF2SVU, is presented with a focus on its internal modifications. This QRO amplifier utilizes three 4CX250 tubes in parallel for its final stage, delivering 1 KW output power. Notably, the amplifier achieves full power with only 100 mW of RF input, a characteristic often associated with Collins designs. The original 400 Hz power supply has been converted for easier shack integration, and the entire RF and power supply sections have been rehoused into a compact, clean enclosure. The control unit, positioned above the amplifier, features three meters for individual vacuum tube IP monitoring and a multi-meter on the right. A dedicated 7 MHz receiver, recently completed, is also part of this integrated system. The autotune functionality means the main amplifier unit only requires connections for power, control, and coaxial cables, simplifying its operation. Key components like the 4CX250 tubes and NF capacitors are visible, along with the gearing mechanism for the final tank circuit. A timer and relay system manages high-voltage delay and cooling fan off-delay, although the cooling fan's airflow is noted as somewhat insufficient. A central volume control, which experienced a contact issue, is also highlighted.

If you have space constraint at your QTH for a HF antenna, you can try contructing this HF magnetic loop antenna for 40-20 meters bands

6m (50Mhz) Long wire antenna There is another form of long wire antenna which provides uni-directional coverage and is easy to build. Description by Arnie Coro CO2KK

Minimal interface circuits for receiver and transmitter audio, also for PSK31

A 40/80 meters dipole made with two loading coils based on a project by IK1ZOY

PTT and soundcard interface schematic by ON6MU

A trapped dipole antenna based on the orignal W3DZZ antenna design resonating on 80 40 20 15 10 meters

An interesting homebrewed gamma match feed for a Halo Antenna

A well documented article about construction and analysis of a horizontally polarized halo antenna for 6 meters band by Dr. Carol F. Milazzo, KP4MD

This article describes the antenna for Low Frequency Beacon. It originally appeared in the "Lowdown" for Oct. 1999.

Shortened vertical antenna for 40 meters band an homebrew project

The main purpose of the county hunter's net is to facilitate the operations of those hams seeking to work all counties in the United State. It is also a useful place for CW emergency communications as there is almost always someone monitoring the frequencies.

My MMPRINT utility is a post contest tool that lets you extract statistical data from a CT log file

This article document a 2 element half wave collinear J-Pole antenna by KC9EOT and KB8OJH

Class C tuned VHF power amplifier for the 6-meter band by ON6MU

Drake unofficial, mods, tach support, classifieds, auctions

Online ham radio practice exam by eHam, allow practice current exams but also old amateur radio exams based on old licence classes.

WM7D's FT100 resource page, dedicated to providing information about and resources for, the FT100

Tips and tricks on homebrewing your own Coax traps by ON7EQ

Offer a wide range of homebrewing projects mainly for VHF UHF operations. From vhf antennas to preamplifiers, chargers and power supplies

Although a magnetic loop antenna(aka small loop antenna) is very compact, its efficiency is close to a half-wavelength dipole if carefully built.

The Alaska Snipers Net was started back in the mid to late 1960's. It started out just as a group of people meeting to chat each evening.

Eham IC-2100H review

Construction details of a multiband dipole that can can operate at high power levels, and match its 50-ohm coax feedline without a tuner

A QRP transceiver for 80 meters band by W1FB

A project for a simple RTTY decoder based on Arduino UNO R3. Includes the RTTY modem source code available for download along to schematics pictures and references.

This article explores the Cobra Junior linear loaded antenna for 80m to 10m bands. This antenna is a linear loaded dipole described by W4JOH in 73 magazine June 1997

4 elements Yagi antenna for 28 MHz

The 5/8 vertical it quite popular and matching solutions can vary

Feld hell freeware windows program that permits RTX hellschriber operations by PA3BQS

Up to date log for 9K2HN & 9K9X (contest call)

Drawing and plan for an HF magnetic loop antenna

The GI-7B (GI-70B) microwave triode

A page dedicated to antenna coil home brewing and coil design by VE6WZ

7N3WVM homebrew project of a 3 W output CW transceiver on 7 MHz band

Fort myers amateur radio club is located in fort myers florida. fmarc has around 300 ham radio operators.

HB9MTN Capacitive antennas for 40m, 30m AND 20m

This program extracts statistics from a dx.dat file to show numbers of spots for each country on each band

Beaconmap is a Win95/98/NT program to help listeners to identify the beacon stations of the NCDXF/IARU beacon network. The program displays a flashing dot at the location of the beacon that is currently transmitting. The call sign of the beacon, as well as the QTH is shown in the status bar. By PA1ARE

This computer control program is specifically designed for the Yaesu FT-920 transceiver. Freeware windows application.

A live police broadcast for the Detroit area police department. Michigan Public Safety Communications System (mpscs)

2E1EHM web site with a collection of pictures. You can download from this site to add to your SSTV picture library.

Amateur radio open source log program written in PHP. Put your log online for visitors to browse in real time. Access your log from any web browse, can run under windows linux and macos with apache, mysql and php