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A quadrifilar helix weather satellite receiving antenna - This article describes how to make a quadrifilar helix (QFH) antenna easily, from inexpensive materials: uPVC plumbing pipe and RG-58U co-axial cable.

Home made GPS antennas - A Home made Helical antenna for a GPS

Loop Antenna Basics - Loop Antenna Basics and Regulatory Compliance for Short-Range Radio

1200Mhz 40elements YAGI - A table with element size and spacing for a 40 Elements yagi antenna for 1200 Mhz

Military Wireless Museum - Military vintage radio collection including spy sets, SOE, SIS, MI6. Classic vintage military radio sets, British, German, Japanese, USA plus other countries.

US HF Amateur Bands - US ham radio band plan in pdf available for download and print

The Shasta Cascade Ham Radio Club - SCARS is an organization of amateur radio operators in the Shasta-Cascade region of northern California (which includes the counties of Butte, Lassen, Modoc, Plumas, Shasta, Siskiyou, Tehama and Trinity).

Bucks & Montgomery Live police scanner - Live Police/fire/ems scanner link for Southeastern PA area including Bucks, Montgomery Counties and Philadelphia plus South Jersey area

ITU Zones map - A PDF File of ITU zones made available by Icom America

CQ Zones World Map - A PDF file of CQ Zones made available by Icom America.

PD5DP Ham Radio Manuals - Another collection of manuals to download offered by PD5DP. Includes ham radio manuals for Icom, Kenwood, Yaesu, Diamond and AOR products

Kenwood manuals - Many of Kenwood’s instruction manuals are available for download. Manuals are in PDF.

ICOM 746 Temperature Measurements - The ICOM 746-Pro has acquired a history of NEC 1678G (IC-151) MMIC and driver transistor 2SK2975 failures. The failure of IC-151 appears to be a combination of ESD damage from electrostatic charge on the antenna entering IC-151, and perhaps thermal heat.

TS-850 service manual - Here is the Service Manual for the Kenwood TS-850 Transceiver split into four parts for download. TS-850 instruction manual also available

Columbia Electronics International, Inc. - Military radio sets for land, sea or air from new current production, unused or rebuilt u. s. military surplus and their accessories and spare parts since 1946 your reliable one stop source.

TANT 136 - DOS program for calculating the performance of a T antenna. Gives loading coil info and matching plus ERP by Reg G4FGQ

PSK08 for Spectrum Lab - PSK08 for Spectrum Lab.Small user file to configure the software for slow PSK.

ADIF Conversion utilities - Converters available from: LogEQF9, Gemradio, SLog 2.09, Hyperlog 4xx, LogPlus, WJ2O, OH1AA, Toplog

T93Y LogPlus to ADIF - Program which will allow you easy migration from logPlus to another logging software. Tested with Logger by K4CY so let me know it you have problem ADIF import to other software.

Rapido - Rapido will provide an automatic download of a JPEG picture from the internet at a certain time interval and show the picture on screen. In addition it allows you to save the downloaded picture on disk.

BIP Electronics Lab Oscilloscope - Freeware windows oscilloscope uses the sound card's input to measure signals. This means that the quality of the scope depends on the quality of your sound card. The scope automatically uses the highest sample frequency available at the input that you select

FreeSCAN - Freeware windows program for programming the Uniden SC230, BC246T, BC330T, BCD396, BC15T and BCD996T scanners. FreeSCAN allows to download and uploading programming, remote control the scanner, log hits, and supports printing out of systems and groups.

SweepGen - SweepGen turns a PC into an Audio Oscillator and Sweep Generator which can be used for testing audio or educational purposes. In conjunction with audio test instruments, you can make frequency response plots. SweepGen uses the sound card in your PC to produce sinewaves

Sine Wave Generator - Freeware windows Wave Generator use the sound card's output as sine wave output. A built in sweep algorithm is used by audio hackers to measure frequency repsonses of their amplifiers

Easy bandpass filters - Quick and easy bandpass filters for receiver input by George Dobbs G3RJV