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Two cheap CMOS ICs and a few transistors was all that was required to rebuild an elderly TTL automatic morse keyer into a low current lightweight battery powered iambic morse keyer.

The ANAN series SDRs are based on the OpenHPSDR open source designs, these are 4th generation radios and represent the state-of-the-art in current Amateur radio SDR design.

Online high pass filter design page with introduction to high-pass filters by K7MEM

New and used test equipment, oscilloscope, spectrum analyzers, multimeters, signal generators, power supplies, network and signal analyzers and more

Essentials or basics of RF signal generators or microwave signal generators, their facilities, capabilities and how they work.

How to take the IF from a Kenwood TS-480

Vhf and UHF homebrewers of hardware and antennas. Find help, idea, or someone with just the same interest as you.

Master the Ham Radio license exams with Ham Technician, Ham General and Ham Extra! With these free iPhone applications, you will take the test with confidence.

"Instruments & Systems for Weather & Water Monitoring; weather stations, wind alarms, sensors for wind speed, wind direction, precipitation, temperature, relative humidity, barometric pressure, solar radiation, evaporation, rain & snow gauges, lightning detection."

Supplier and exporter of generator, diesel generator, petrol generator, industrial generator, silent generator, power generator, electricity generator, gas generator, air cooled generator, gensets 1kva, 2kva, 5kva, 10kva, 50kva, 100kva, 250kva

Kennedy Safaris, cheap,well organized and ham radio friendly

Microphone tips for the Icom 706MkIIG

Kenwood TS-2000 Transmit / Receiver eSSB Modifications by N3GX

Worldwide sellers of vacuum tubes and electron tubes for audio, radio, and industry

VK port-a-log is an Android logging app primarily for portable logging. It can be used for SOTA, WWFF or portable operations.

Fabrice personal page

We have a wide range of power protectors and surge protection products available

eham review of the ICOM IC-756PRO

The correct way to calibrate the MFJ-259B analyzer

West St. Louis County Police and Fire Live Audio Feed

Stryker 10 Meter Amateur Radio trasceivers, antennas and accessories manufacturer

Replacing the Yaesu FT100D SRF7043 VHF/UHF RF MOSFET Power Amplifier

Two tables comparing several coax cables on attenuation and power ratings

October 2003 QST article on working digital mondes with sound card interfaces

Ham radio blog from mexico mainly in spanish

quality Quartz Crystals, Clock Oscillators, VCXO's and TCXO's

QSL Cards from the past, ham radio QSL Card collection by W8JYZ

This is a schematic drawing of a project for the construction of a portable mast that can easily be made with PVC pipes.

Ham radio HF antennas manufacturer, produce HF dynamic beam antennas, and vertical pole antenna. Offer kits and parts to build you own dynamic antennas, by IZ0AEG

The Highland Amateur Radio Association (HARA) centers itself in Hillsboro, Ohio.

A Resonant FeeD line (RFD) antenna for 7 MHz prohect tested and tuned.

A group of local hams who operate nightly on simplex and discuss all sorts of topics

Have you ever thought of setting up a portable HF station for an activity ?

Presents a dedicated logging solution for amateur radio DXpeditions, addressing the unique operational demands of remote or temporary stations. This freeware Windows application provides essential tools for managing QSO data, ensuring accurate record-keeping during high-volume operations. The software supports efficient entry and retrieval of contact information, crucial for verifying DXCC credit and submitting contest logs. It streamlines the process of logging contacts, which is vital when operating from rare entities or during intense pile-ups, helping operators maintain focus on making contacts rather than complex data management. The application aims to simplify the logistical challenges associated with DXpedition logging.

Ham radio shop in South Salem, NY, dealer for Alinco, LDG, Cable X-perts, Jetstream and several antenna types and makers

Adding 17 meter band to Mosley TA-33M yagi antenna

Amateur Radio Station OD5SK , Op.Samir Khayat Tripoli Lebanon

An easy to build dipole for 21 and 14 MHz with traps made by two T50-6 toroids cores mounted on a simple PCB foil

This converter uses the popular NE602 mixer/oscillator chip and allows reception of signals below 500 kHz on a 3.5 – 4 MHz HF receiver

QRZ.com Free app for iPhone iPad let you search the QRZ.COM call sign database from your mobile device. Completely free with no subscription required.

A nice tutorial and the basics of the software defined radio, SDR, and links of software defined radios to JTRS, and general SDR receiver technology.

Ham radio Dxpedition

Grupo Argentino de CW

Ham radio activities, from satellite operations, eme communications, dxing and contesting, qsling and direction findings, are just some of ham radio exciting activities

DIY beacon for six meters band by K9MU

Audio setup at N2RIT built around the Yaesu FT-950 abd the Heil Sound PR-781 an ultraflex PRO EX3200

Introduction to WSPR beacons. Article describe WSPR2 and WSPR15 beaconing mode and include a frequency reference table for both WSPR modes

The page provides detailed instructions on how to build a 60 meter End Fed Half Wave Antenna Tuner, with large pictures and diagrams. It is aimed at amateur radio operators looking to construct their own antennas for the 60 meter band.

Software defined radio products. Maker of AFEDRI SDR a direct sampling Software Defined Receiver by 4Z5LV