dc converter

HF Helical Whip Calculator - Build your own HF helical whip antenna for mobile or portable operation

HF Field Day Antenna Ideas - Homebrewing portable antennas for field day operations

Museum of Broadcasting - The Museum of Broadcasting houses one of the world's finest collections of antique radio, television, and broadcast equipment

Delta County Amateur Radio Society - The purpose of the site is to allow people interested in Amateur Radio to learn about our organization

GB3DC Repeater live - Listen to the live audio stream from the GB3DC repeater

FM DX Antenna Company - FM antennas for reception and transmitting on the FM broadcast band, Weather Band antennas, Wireless microphone antennas, and products to improve reception for the FM antenna, weather band radio antenna, and wireless microphone antenna.

Elenos - ELENOS is the leader company for fm transmitters, amplifiers, radio broadcast equipment and custom systems.

Amplifier Systems, Inc - Designer and manufacturer of RF amplifiers used in a variety of custom applications in many diverse industries - from Scientific, Medical, Industrial, and Communications and Broadcast.

Filter Concepts - Custom EMI Filters, AC DC Three phase filters by Filter Concepts Inc.

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

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

Fixing the LDG Z100 ATU - Repair LDF Z-100 toroid by VK4ADC

Elecraft K2 - Narrow Bandpass Filter - This note covers narrowing the K2\'s 40M bandpass filter to cover the narrower 40M band and reject strong out of band broadcast interference

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

Baofeng UV-3R unboxing and first review - A short review at ICQ podcast on the Baofeng UV-3R handheld transceiver

HFUnderground - HFUnderground.com is dedicated to documenting longwave, mediumwave, and shortwave stations, including broadcasters, utility/military stations, pirate radio and spy numbers stations.

Scan Stockton Priority listing - Scanner Recordings, Video Clips, Image Gallery From Stockton CA Area. Live Scanner Feed Available. Over a 110 plus audio downloads of fire, police, and other scanner recorded incident traffic. Listen while you browse the site by using the podcast media player.

Radius Power - DC Filters - DC filters from radius power are specifically optimized for applications with DC supply like e.g. photovoltaic inverters. Radius Power provides total power solutions, EMI filters solutions from design to manufacturing, Three Phase, Single Phase, Power Line, IEC inlet, Power entry modules Filters.

OscarDelta IP Over AX.25 - This is a packet radio software developed for amateur radio operators to provide IP communications. You can chat, send/receive e-mail, surf the web and so on via radio depending on your bandwidth. You don't need a TNC. You might have all of TNC features via SoundCard using SoundModem.

SDR-RADIO.com - SDR-RADIO.com is a Windows console for SDR receivers and transceivers. Designed for the commercial, amateur radio and short-wave listener communities, the console provides a powerful interface for all SDR users. Many SDR owners have made their radios available over the internet. Just look at the Web Servers page for a list of the radios you can use. You do not need a licence to use this sodftware with RFSPACE, FUNcube Dongles, Soundcard (SoftRock) and low-end SDRs.

VIT Voice Keyer - The VIT Voice Keyer is a simple soundcard based voice keyer. It plays various recordings and output them to your radio and key the PTT line.

DC RF Sensing PA Switching - Circuit for dc/rf sensing pa switching from g8mny

Non-relay instant RF Switching - Coax lines to do the RF switching. The advantages are instant switching, no power wasting DC control circuits.

A Switchbox for Soundcard Digital Modes - A homebrewed switchbox prooject Don Wilhelm W3FPR

PSK31 interface - A simple PSK31/digital interface which can connect your transceiver to a PC soundcard for digital modes.