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MMTTY V1.70K, released June 4, 2017, provides a full 3.5MB installation for RTTY operations on Windows platforms including XP, Vista, and Win7. The software, developed by JE3HHT, utilizes a soundcard for RTTY decoding and encoding, with support for external FSK keying via parallel or serial ports, including USB serial adapters. An MMTTY Engine V1.70K is also available, specifically designed for integration into other commercial amateur radio programs requiring RTTY functionality. Older versions such as MMTTY V1.68A (September 29, 2010) and MMTTY V1.66G are accessible, alongside a non-installer version (MMTTY168A-i.zip) for experienced users. The resource includes an updated ARRL.DX file for callsign lookup and offers a comprehensive 18MB PDF help file for offline viewing or download. Support for the software is directed to a group.io community. MMTTY integrates with **COMFSK** and **EXTFSK/EXTFSK64** for precise FSK keying, enabling direct radio control. The site also hosts MMJARTS V1.03, a 254KB utility released September 6, 2002, which generates log and summary sheets specifically for the JARTS RTTY contest, linking to the official JARTS website for contest information.

SSTV freeware software for Windows by Mako JE3HHT. MMSTV is a free software application designed for transmitting and receiving SSTV (Slow Scan Television) images over HF bands. It allows radio amateurs to share still pictures using sound-card interfaces and a transceiver. The program supports popular SSTV modes (Martin, Scottie, Robot, etc.), real-time RX/TX monitoring, and easy image editing. Its user-friendly interface and reliability make MMSTV a favorite choice among ham operators worldwide. Ideal for showcasing QSL cards, shack photos, or technical diagrams over the ai An excellent SSTV program that requires only a computer with soundcard, no expensive TNC required. Works on all Windows version including Windows XP, Vista and Windows 7.

Free Download of Widebander. This software will allow you to extended TX for the Yaesu FT 857 FT 817 FT 897 and reset back to standard factory defaults. Warining: this programs looks like not to be supported. Download and use it at your own risk.

The word balun means balanced-unbalanced: it's used to adapt a balanced device to an unbalanced one, read more basic thory on Ununs and Baluns

Freeware DSP filter by JE3HHT

The page provides a tool to create a customized Ham Radio Az Map on the fly, with various dimensions available. It is a valuable resource for amateur radio operators to visualize and optimize pointing of directional antennas. The content includes maps for different regions, prefix maps, and world maps.

Delta loop and vertical antenna plans with translation in italian

Yaesu FT-857 modifications, schematics and manuals

Modifications, manuals and schematics for Yaesu VX-7R

A very beginner's guide to coax cables. Characteristics, detailed comparison of typical coaxial cables, commonly used connectors, and a few words about SWR.

Modifications, schematics, programming interfaces and manuals for the Yaesu FT-897

Modifications schematics and manuals for the Yaesu FT-857D

Shows QSO and SWL in real time, taking data from many different sources (DX-Cluster, WSPR, Reverse Beacon). It also allows to send DX-Spots and more features.

Project for a 12 volt, 30 ampere Power Supply Unit

Circuit diagram and discription of 7 MHz Ham Radio SSB Transceiver. Transceiver using two MC1496, 4.43 MHz Ladder filter, LM386, LM324 and IRF840 in final.

CAT control and logging software project especially developed for the YAESU FT-857 transceiver. Full control of the trcvr, EEPROM modification, VoIP, TCP/IP remote control, macro CW keyer, visual band scope

Programming interface schematics for Icom: Programming software for Icom IC-706 (Icom IC 706 IC706) : PDF Service Menu for Icom IC-706 (Icom IC 706 IC706) : PDF Service Manual with schematics for Icom IC-706

Programming interface schematics for Yaesu FT-897D programming interface, Yaesu 4 pin plug PDF User Manual for Yaesu FT-897D (FT 897 D FT897D)

CAT control and logging software project especially developed for the YAESU FT-897 transceiver. Full control of the trcvr, EEPROM modification, VoIP, TCP/IP remote control, macro CW keyer, visual band scope

You can have your persolal DXCC country list with correct beam heading calculated on you grid square location

This Test Tone Generator (TTG) turns your PC into a function generator and enables you to demonstrate, test and tune sound systems, create sound effects and a whole range of other uses to suit your needs. It can also be used for educational purposes.

Kenwood TS-2000 manuals schematics and mods

Ferrite Toroidal Cores, Magnetic Properties of Ferrite Materials, EMI - RFI Suppression Design Considerations, Ferrite Beads, Ferrites for RFI Ferrite Cores for RFI Suppression by CWS ByteMark

Short dipole antenna for 40 meter ham band. Can be put up in the space required for a 20 meter dipole.

IC-718 modifications schematics and manuals

mods collected by mods.dk

Freeware Adif to cabrillo converter by SP7DQR. Windows ADIF 2 Cabrillo log format converter application let you translate you contest log book from the standard ADIF format to the Cabrillo format.

Build a PSK-31 PC interface for the yaesu FT-817

ST0R Log Online Souther Sudan 2011

Search for schedule of radio programs by selecting the language

Online generator or Azimuthal equidistand map

Again, Kenwood TS-2000 modifications collected by mods.dk

Ham.dmz.ro Yaesu FT-817 page

Modification schematics and manuals for TH-F6A

Online calculator for Bi-Quad antennas

5 Elem. yagi for 10 meters, 9 element yagi beam antenna for six meters band by ON4ANT

Demonstrates the construction and performance of an updated ZS6BKW multiband dipole, a variant of the _G5RV_ antenna, specifically designed for HF operation. The article details a real-world installation using 13.5m copper wire elements and 12.2m of 450 Ohm ladder line, configured as a sloping inverted-V with the apex at 10m and ends at 4m above ground. It covers the critical aspect of impedance matching, incorporating an 8-turn choke balun at the feedline transition to RG-58U coax to mitigate RF common mode current. Measurements confirm favorable SWR readings below **1.3:1** on 7.1 MHz, 14.11 MHz, 18.06 MHz, and 24.8 MHz, indicating effective resonance across 40m, 20m, 17m, and 12m bands. The installation also shows usable SWR dips on 3.55 MHz (5:1), 29.02 MHz (2:1), and 50.84 MHz (3:1), extending its utility to 80m, 10m, and 6m with an antenna tuning unit. Initial on-air results report clear reception of stations over **5000km** away, validating its DX potential.

Online calculator for Logarithmic Periodic Dipole Antenna LPDA

How to DIY a 9:1 balun in french

Service maual for Icom IC-718

Modifications schematics and manuals

QSO Map Deactivated Due to a new pricing structure for Google Maps APIs (since March 1, 2025), the map function is no longer free to use. For this reason, the QSO Map has been deactivated.

Repeater system in the New York metro area Service provided by W2LIE.NET

Cat interface for Kenwood transceivers, tested with TS-850 and kenwood TS-50 but should work with all Kenwood rtx

A small transmitting loop antenna for 20 metres using a aluminium bicycle wheel rim.

Mods and articles collected by mods.dk

MMVARI is a multi-Mode SoundCard Ham (Amateur) Radio program for receiving and transmitting the RTTY-PSK-FSK-MFSK modes. The program was written to experiment with the efficiency of transmitting Japanese and East Asian languages (HL/BV/BY) using the VARICODE

General Mobile Radio Service Frequencies

Design your own quadrifilar helix, the site even generates a drilling pattern in a PDF file. Several different construction methods are shown.

A 40 meter band two elements yagi beam with a 6mt boom with pictures and drawings