austin tx

TX Four Square Antenna - A 220-ft tower that has five catenary lines, each about 500 feet long. Four of these lines, running NE, SE, SW, and NW support four 1/4-wavelength wire verticals used in a 160-meter four-square antenna.

2 Meter J-Pole design - J-Pole Antenna by K4TAX

EWE Antenna comments - cq-contest reflector comments about the performance of the EWE receive antennna collected by KA9FOX

Vertical stacking of HF antennas - Benefits of stacking two HF antennas vertically

TX3D - French Polynesia - Austral Islands, 18. Jan. - 4. Febr. 2010, Raivavae IOTA OC 114 FO/DL1AWI FO/DL3APO FO/DL5XU

TX3D online log - TX3D & FO/DL3APO 2010 DXpedition to Raivavae Island (OC-114), Austral Islands

SOTA & QRP - Italian QRP site dedicated to SOTA activities

MM0DXK Renfrew Amateur Radio Society - Renfrew Amateur Radio Society was started in 2004 by the founder member Tommy 2M0 TXA

Kendall Amateur Radio Society - Kendall Amateur Radio Society (KARS) offers ham radio activities and fellowship to ham radio operators in Boerne, Tx, the hill country and NW San Antonio.

K4KIO - Broadband Hexagonal Beam Antenna - The broad band hexagonal beam (hexbeam) designed by G3TXQ and built by K4KIO

Become a high speed CW operator - How to become a High Speed CW operator, summary of information by AH6NB

80M Fox-Or-Test Transmitter - The 80 metre fox-or/test transmitter is a small low power transmitter which is designed to be used as an alignment aid for running up 80 metre foxhunt or ARDF receivers. It is also usable as a micro transmitter for fox-or-ing events.

2M Programmable Fox-Or Transmitter - The 2 metre fox-or transmitter is a small low power transmitter which mounts in a small plasic pipe and runs off two AA batteries. The board measures just 12mm by 70mm.

SB-220 Mods - Heathkit SB-220 Amplifier modification by KE5YA

HAM IV Rotor restoration - HAM-IV antenna rotor repari and restore

CW without key clicks - High speed telegraphy without key clicks by SM5BSZ

G3TXQ Milliwatt meter - Meter capable of accurately measuring low levels of RF power

Multi-Four a VXO QRP Transmitter for HF bands - This transmitter has been designed for use on 20 30 40 and 80 m with 5W output

40 QRP CW Transceiver - Amateur Radio (G3TXQ) - Malta 40 QRP CW Transceiver

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).

The Duet CW RTX - Design for a dual-band CW transceiver using the AD9834 Direct Digital Synthesizer

40 meters QRP CW RTX Priority listing - This is the schematic of asolid-state 7 MHz QRP CW transmitter by VU2NAN

TenTec Omni VI AGC modification - Modification leaves nearly all of the existing Omni agc circuitry intact, simply add an audio detector which modifies the delay characteristics of the original system by G3IXQ

Kenwood TM-201 401 mod - Kenwood TM-201/401 Increased TX Audio, mod for microphone gain

Softrock SDR and Six Meters - DF9CY using Softrock RTX on 50 MHz