ttl converter

A cheap dual band ground plane antenna - This little antenna is cheap and easy to build, lightweight, and very functional on 2 meters and 70 centimeters by NA4IT

2 Meter Groundplane Antenna - 2 Meter, 5/4 Wave Antenna project, this antenna is unique in that it is enclosed entirely in ¾” PVC which makes the design a little more complicated.

4 meter antenna conversion - A Siverrot antenna converter for 70 MHz operations

The Mysterious Cobra - The Cobra antenna explained, article by Rick Littlefield - K1BQT

Cookie Cantenna Wi-Fi - Make a cheap, portable, high performance (15-18 db) directional antenna out of commonly available parts that can be purchased in most grocery and hardware stores.

WebSDR in Texas USA - WebSDR receiver by KD5QLM located in Little Elm, Texas

TG Electronics - Specialize in the manufacturing and sales of DC Boosters, Regulators, Converters and Accessories

ARVN Amateur Radio Video News - Digital Voice (DV) - Digital Voice is here, a quiet little revolution in Amateur Radio. Will it replace SSB (and FM) the way SSB replaced AM? Some people think so.

Morse code to text converter - Online morse code conversion tool

AO-40 VHF Converter - 144 MHZ to 28 MHZ 2nd Down-Converter for AO-40 Sat

A 2.3GHz to 432MHz receiver converter - Receiver converter that can be plugged to the backside of the Yaesu FT-817 battery powered portable transceiver

CAT cable schematic for FT 817 857 897 - To connect up your FT-817/857/897 to a PC you have a number of options. For the serial connection you can go ahead and obtain a CT-62 from YAESU. Alternatively you can make up your box with a level converter and cable using schematic in this page

GridLocW - GridLocW a Lat/Long to Maidenhead converter for Windows with optional GPS support

ADIF2CABR - 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.

Yea Cabrillo2Adif Converter - Cabrillo2Adif A software for converting the radio logs from Cabrillo to Adif log format (for Mac OS X)

Excel ADIF Converter - Use this excel spreadsheet and use it to input your old manual logbook data and have it converted to the ADIF format

ADIFLookup - This utility was written as an interface between N1MMLogger and Logger32. Freeware windows Log Converter.

DB Watts EIRP Calculator - Online calculator, to convert dbWatts to Watts and vice-versa, or ERP and EIRP by G4URH

PC Board Filters - Offer performance comparable to tin-box filters, and except for being bigger, stack up pretty well with those expensive little helical jobs. You just have to be able to make your own PC boards.

LF Converter - Home made LF converter, listen to signals below 300 KHz

A CW QRP Transceiver for 20 m band - The little QRP presented in this article may be built in a gradual manner, it is divided in two main modules (plus VFO), you may also complete only a single part (RX or TX module).

Radio Programming Interface - This article describes a generalised unit for interfacing a transceiver's TTL/CMOS interface to RS-232.

Crystal tester - Crystal tester project, crystals are used to control the operating frequency of transmitters, and it is used in radio frequency converters, oscillators, filters for cw, ssb and many other applications.

VGA To Scope Converter - Converting a computer\'s VGA output for an oscilloscope

2M to 10M receive converter - EI9GQ 144 to 28 MHz converter