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CW paddle made with a steak knife some simple hardware and a stainless steel fork

Outbacker mobile and portable antenna systems are slim line, highly efficient, single whip multi bond antennas for vehicular and limited space portable applications.

A folded wire antenna for 160 meters as appeared on 73 amateur radio magazine june 1997

MS Word documents including IC-718 review by hamdiham

Demonstrates practical solutions for reducing **Radio Frequency Interference (RFI)** in amateur radio operating environments, specifically addressing issues with PC monitors, receivers, and transceivers. The resource compiles advice from experienced operators regarding the selection and application of ferrite cores, including split cores and toroidal cores. It details specific material types like **43, 73, 75, and 77 ferrite**, outlining their effective frequency ranges for RFI suppression, such as 43 material for 30-400 MHz and 77 material for 2-30 MHz. The content provides part numbers for various ferrite products from manufacturers like Fair-Rite Products Corp, distributed by Amidon, and discusses their impedance characteristics across different HF bands. It compares the performance of various ferrite materials at frequencies like 4 MHz, noting that 75 material offers 27 ohms, 73 material 17 ohms, and 43 material just under 10 ohms. Additionally, it touches upon the use of bypass capacitors in conjunction with ferrites to create low-pass filters, emphasizing the importance of identifying common-mode versus differential-mode RFI paths for effective mitigation.

A marriage of the windom and slinky antennasm, article by NC4TC

Project plan for a 4 element yagi beam for 50 Mhz

The 60 Watt linear amplifier is simple all solid state circuit using power mosfet IRF840.

How to make your ham radio system mobilemany ham radio operators carry radios for fun, safety and public service activities. radios for both vhf and hf frequencies can easily be installed in vehicles.

Google map beacon map on 10 meter

A copper pipe Hentenna for 144 MHz. The Hentenna, a compact, high-gain loop antenna developed in Japan in the 1970s, offers approximately 5.1 dBd gain, comparable to a three-element Yagi. Adapted for 2 meters, it is crafted from copper pipe for simplicity, affordability, and broadband performance. Requiring no feed-point tuning, its construction involves soldering standard copper fittings. Installation demands non-conductive materials to minimize signal disruption. Versatile for vertical or horizontal polarization, it is ideal for FM, repeater, SSB, or CW applications. This design emphasizes practicality and performance for amateur radio enthusiasts

An interesting arduino project to work as an antenna tuner

A compact multiband wire antenna suitable for portable operations.

MorseGen is a simple program the purpose of which is to generate Morse Code at whatever speed you feel comfortable reading, for practice purposes. It wasn't designed to be a tutor for those who know no Morse at all, although you might find it useful for that purpose. It doesn't have a feature for sending small character groups over and over, although this can easily be achieved by creating text files containing the character groups you want to practice.

A wip antenna for 6 meters band by JA1HWO

Table representing loss of Coax Cables in db per 100ft.

Monitors the space weather parameters essential for HF radio, including SSN/SFI, Ap/Kp, X-ray/Proton flux, and Auroral activity. IonoProbe downloads near-real time satellite and ground station data, stores information for future use and displays it in a user-friendly way.

That just about sums up many peoples attitude towards test equipment. Multimeter, SWR/Power Meter, Dip Oscillator, RF Signal Generator, Cathode Ray Oscilloscope

Building a Dummy Load and Measuring Power Accurately

K6DQ GAP titan dx antenna repair

Lookup callsigns in locator, or locator of a specified callsign and display in google map

Build your own multi-band mobile ham antenna with a Hamstick

One popular rumor or thought is that antenna gain doubles every time we double the number of elements

An efficient 2 meter antenna disguised as a TV Satellite dish. This vertically polarized horizontal slot antenna, cut into the reflector of a TV dish, might be the ultimate stealth antenna.

CB Radio, and 10 meters antennas manufacturer

A magnetic loop antenna calculator made with an excel sheet that run also with open office, let you design mag loop antenna dimensions by AA5TB

Spread Spectrum Scene. Radio Propagation notes, with downloadable files.

An invisible magnetic loop antenna mounted under a table by PY1AHD

A QRP 900 grams hydraulic tuned small magnetic loop antenna by PY1AHD Alex.

If you want to interface the IC-746 Pro or any other Icom rig with a computer for rig control, an outboard CI-V CAT device is required.

In this article the schematic is of AA5TB QRP power meter and dummy (50 Ohm) load combination

A morse code tutor for the Macintosh.

Collection of mods for the Kenwood TS-850

Angle Linear has been producing GaAs FET preamplifiers since 1980

A monoband antenna with large bandwidth in French

Low Cost Frequency Counter, Digital Display and DDS-VFO kits

How to calculate "phasing line" lengths that actually work.

About dummy loads, what are they and how to build one

German Web site

Recordings of shortwave numbers stations

Produce QSL & post cards, stickers, ID cards, calendars, certificates, awards, membership applications, log and call-books, rubber stamps,T-shirts, brochures, advertising materials.

Dutch scanner web contains information about dtmf pagers gsm tetra umts scanners decoders.

W1YW QRZ page dedicated to fractal antennas

LNA Technology High Performance Low Noise Preamplifiers for Amateur Radio, VHF-UHF weak signal, DX, EME, and commercial applications.

CB and ham radio dealer in spain

Calculate design for a quadrifilar helicoidal antenna

All bands HF mobile antennas manufacturer

If you are interested in the environment, the weather and other natural phenomena then there is something magical about being able to see pictures of the earth from space just as it is right this minute. One way you can do this is by receiving images from weather satellites.

ARRL comparison of HF transceivers, including Elekraft, TenTec,Icom, Yaesu and Kenwood recent transceivers based on QST product reviews

German page about packet radio, english version available