amplifier keying relay

IZ7ATH Projects  ^pop - Antennas, Keyer, amplifier, transverter, baluns

Top Ten Devices - Automatic band decoder, six way antenna relay, band reject coaxial stubs and more

USA - ARRL - American Radio Relay League

CT Ham radio devices - CT hand keys and paddles. Power tubes, sockets, relays. DX Scack rentals.

Emtron  ^pop - Amateur radio HF amplifiers and power supplies manufactured in Australia

RM Italy  ^{updated  pop} - RM is an Italian company operating in the radio communication field since 1974, main products are: HF-CB-VHF-UHF-Dual Band Amplifier, Power Supply, DC-DC Converters Antennas and more

SGC, Inc. - Manufacturer of HF transceivers, antenna couplers, antennas, RF Power amplifiers, portable antennas, speakers and other accessories for 28 years.

HD Communications - Rf Connectors,RF Amplifiers,RF Filters,HF cable and accesories. Tower hardware valves and tubes

Ten Tec  ^pop - HF, VHF, transeivers kit's, amplifiers and more.

CBC International CB Radio - "CB books, plans, and kits. Repairs, modifications, 10-Meter conversions, amplifiers, FM, unique high-performance accessories. Publishers of the classic ""Screwdriver Expert's"" Guide book."

Andrews Communications Systems - Australian dealer, HF linear amplifiers, power supplies, baluns, HF UHF yagis and verticals including multiband HF verticals.

The Dutch Relay Service - A relay service that is active on 15070 & 21890 khz AM. Also here the info that you need to get your program world wide into the air.

Finite difference program - This software is able to calculate the properties of odd shaped transmission lines. Particularly good in valve amplifier design, for aiding the design of transmission line resonators.

Commander  ^{updated  pop} - A free application that controls up to 4 Alinco, Elecraft, FlexRadio, Icom, JST, Kachina, Kenwood, TenTec, or Yaesu transceivers, switching between them manually or automatically based on frequency, and displaying frequency-dependent settings for devices like tuners and amplifiers; includes a bandspread, and supports transverters, frequency and mode tracking by an independent transceiver or receiver, SDR-based panadaptors, and SO2R switching with microHam or OTRSP-compliant devices.

Amplifier Simulation Program - ASP 4.0 - Design weak signal GaAs FET or bipolar PreAmps. Automatically designs for optimum gain, NF, VSWR or all.

iHamRelay - iHamRelay offers you more than 2500 repeaters all across Europe and the possibility for you to join the community while sharing your own data

BBA-C1 Amplifier Card - This versatile broadband amplifier is used in several DX Lab projects.

WB0NNI Home Brew HF Amps and Tutorials  ^pop Priority listing - Tutorials and other information on designing and building hf amplifiers. Includes tube data and amplifier projects.

Homebrew a HF Power Amplifier - HF power amplifier project by YB0AH

100W HF QRO linear amplifier - Based on Motorola MRF454, schematics and component list

70cm GS-23b Amplifier - 1500 watts amplifier for 70 cm band using GS23B /4CX1600U SVETLANA by LZ2US

Push pull 2m amplifier - This shows an unsuccesful attempt to build a push pull 2 m amplifier, with the tubes in grounded screen.

Opto Coupler for Keying - Isolating traceiver and your computer with an opto-coupler component

ICOM CI-V Interface schematic - G3VFP schematic for the ICOM CI-V interface with PTT and CW Keying

SSB and CW Filter - A pdf file with schematics of an ssb and cw filter AF amplifier