Search results

Pictures and plans of a 4 elements yagi beam antenna for 14 Mhz

The 75 meter dipole at K7ZB was put up to meet the need for making contacts with friends in the Southwest and Southern California. As usual, it had to be put up so no one can see it from the surrounding neighborhood.

50 MHz 1500 Watt Russian GS35B amplifier. Well documented. Complete construction details,pictures,schematics, and more.

A complete overview of modern digital HF radio operating modes: PACTOR AMTOR GTOR CLOVER RTTY PSK31 HELLSCHREIBER PACKET MT63 MFSK16 THROB.

A portable dual-band antenna working principally on 10 meters but also close to the 30 meter band. It's compact, light, economical and doesn't need any radial.

A 3 band dipole for 10 15 and 20 meters band, easy to build, and that can be easily setup in any occasion, inclunding field days or portable operations

Here is a high-performance hand-held beam antenna that is easy to build and guaranteed to improve your downlink from the LEO satellites over ANY rubber duck or mobile whip

Grounding Systems for Amateur Radio Stations, Safety grounds vs. radio frequency (RF) grounds, the practical station ground

Alinco is a prominent manufacturer in the amateur radio industry, specializing in a variety of transceivers, receivers, and accessories. Their product line includes HF radios, mobile transceivers, VHF/UHF handhelds, and scanners, catering to both novice and experienced operators. Alinco's commitment to quality is reflected in their ISO9002/140001 certification, ensuring that their products meet high standards of performance and reliability. In addition to transceivers, Alinco provides power supplies and various accessories that enhance the ham radio experience. Their offerings are designed to support a wide range of operating conditions, making them suitable for both portable and fixed station setups. With a focus on innovation and customer satisfaction, Alinco continues to be a trusted name among amateur radio enthusiasts worldwide.

Canadas Amateur radio, citizen band , shortwave, scanners, marine radio distributor and manufacturer of ham radio accessories

Amateur radio HF nets

Download this color US ham radio band-plan in PDF format edited by ARRL

Make your own dummy load with two 100-ohm 5W resistors

This shows an unsuccesful attempt to build a push pull 2 m amplifier, with the tubes in grounded screen.

A suitable high gain 70cms antenna for SOTA operation by Richard Price GW0VMW

A 3 Element Mono-band Yagi for 20 meters by Kees Wiegers, PA5CW (ex-PA3BHS)

Ham radio pictures, qsl and sounds archive by K8CX

Article with detailed pictures of an endfeed antennna for 20 and 30 meter band

Ham radio dealer based in germany offer RF power amplifiers, from Alpin and SPE, antennas, RFI suppression products and GSM GPRS products

Step-By-Step Construction of a 4:1 Current-Type Guanella Balun by W1CG

Programs for hams written by Alex Shovkoplyas

W7TDC modification of the Ameritron AL-80A power amplifier

Windows application that will allow you to perform calculations with the popular Maidenhead Grid Square system. This grid system is used worldwide by amateur radio operators for many aspects of ham radio.

Constructing and designing full size, single band stacked yagi antenna arrays

KSM Kenwood Smart Memory is a program to read and update the memory channels of a Kenwood amateur radio. The current supported types are: TS-450S, TS-570D, TS-570S, TS-690S, TS-870S, TS-940S,TS-950S.

QRP and Homebrew HAM Radio by DL2FI and DL7NIK QRP Made in Germany and more QRP Kits, qrp transceivers, accessories, mini keyers dealer for antennas, atu and more accessories

An interesting article about homebrewing antenna traps for multiband antennas by VE3GK

IARU band plan comparagraph

A detailed drawing of a VHF UHF Log periodic antenna by VA2PHI

Plans, photos, electrical and mechanical design for this HF Log periodic antenna.

The multi-band trapped dipole is resonant on approx 3.7, 7, 14, 24 7 28.5 Mhz. The overall top length needs to be approximately 32.9 Meters

This antenna is intended as a simple, inexpensive solution for the newcomer to experiment across the 40m band (7.0-7.2MHz) when only restricted space is available

Retrospective of a mark now disappeared. Jumbo, Multimode, Concorde, Puma, Viking. Photographs, diagrams, adjustments etc.

Guide to calculate effective gain of antennas

Contain schematic diagram of many different radio, and some operations instructions.

Sardine Can Antenna. is a BiQuad or Bi circle - wire length each side (8 x 1/4 waves ) 31 mm

Proposed frequencies for PSK31 QSO

2el 40Ft front to back spacing 80 meters Quad antenna

How To Build Code-Practice Apparatus: A Simple Telegraph Key

Log4OM is a Free Windows complete station management that includes general logbook program, dx cluster, CAT radio interface and interface to several ham radio services like LoTW QRZ HRDlog and more.

Ham radios at Gigaparts inc. Kenwood Icom Yaesu and most famous brands.

Hong Kong's only full-service amateur radio store. Full line of Amateur Radio and Two-way equipment and accessories from companies such as Yaesu, Icom, Kenwood, Motorola, MFJ, Alinco, Diamond, AOR and many, many more. Knowledgeable staff with many years of experience in the radio business TAX-FREE shopping (no sales, VAT, GAT or other taxes) HF, VHF, UHF transceivers, receivers, walkie-talkies, antennas, antenna tuners, coax and connectors

WSJT-X - Weak Signal Communication, by K1JT - offers specific digital protocols optimized for EME (moonbounce), meteor scatter, and ionospheric scatter, at VHF/UHF, as well as for LF, MF, and HF propagation. Support digital modes like FT8 FT4 JT65. The program can decode fraction-of-a-second signals reflected from ionized meteor trails and steady signals more than 10 dB below the audible threshold. WSJT-X incorporates nearly all popular capabilities of programs WSJT and WSPR, while adding comprehensive rig control and many other features. Open-source, download latest version for Windows, Linux, Mac OS X.

This web page describes a small, single tuned circuit regenerative receiver primarily for daylight reception in the 16, 19, 22 and 25 meter international shortwave broadcast bands.

A double bazooka antenna plan for the cw portion of the 40 meter band

A cost effective current-mode 1:1 balun can be constructed from a length of coax and a rod typically used for a broadcast antenna loop-stick, some electrical tape, cable ties, a length of PVC water-pipe and some connectors.

Complete introduction to amateur radio, excellent resource for beginners.

SWR / Wattmeter with Arduino Uno Shield. It can measure from 2 to 200 watt and SWR for HF Ham radio.

SSTV program for the Linux platform with several functions written by ON1MH Johan. QSSTV is a Linux-based program for receiving and transmitting SSTV (Slow Scan Television) and HAMDRM (Digital SSTV) signals, compatible with MMSSTV and EasyPal. Key features include support for narrow band SSTV modes, gallery functionality for viewing received/transmitted images, repeater capabilities for both SSTV and DRM modes, PulseAudio direct interface, and CAT radio control. The software includes waterfall visualization, hybrid mode operation, and template editing features. QSSTV requires Qt5 and several other libraries for compilation, and operates with a three-window interface for receive, transmit, and gallery functions.

GlobalTuners provides access to web controlled receivers. Listen to Ham radio, Tune Shortwave radio, Listen to Air traffic control, experience Airband receptio including ACARS and Airports. Tune remotely controlled receivers all over the world with your browser and get live audio.