amp keyer

HamLin Tower Project 2003 - A cooperative venture between MSUARC and Calloway County Fire and Rescue

Yagi-Uda Antenna Priority listing - The Yagi-Uda antenna, information on basic design, project and measure of Yagi-Uda antenna, include free repository/sample of beam antenna.

Twin City Amateur Radio Club - Champaign-Urbana Illinois

K3CR Penn State Amateur Radio Club - Servicing the University Park campus of The Pennsylvania State University, and the Penn State Amateur Radio Club.

D-Star presentation and sounds - A powerpoint presentation of the D-STAR operating mode by K7VE includes d-star sound samples

K1EL Ham Radio Kits - Morse Code Keyers / Processors and other PIC products. CW RTTY serial and usb interfaces and keyers kits.

American Morse Equipment - Providing quality products to Amateur Radio Operators, morse keyers, portable paddle.

ExTech - Electronic test and measurement; digital multimeters, clamp-ons, portable printers, meters and dataloggers.

Deree Electrical - Specialized in manufacturing measurement instruments for more than 25 years. Clamp meter, digital multimeter, analog panel meter, thermometer, and led panel meter

Hellscreiber sample - A sample picture of a Hellschreiber CQ call

5 Amp power supply for portable usage - A 13,8v/5Amp 78H05 based power supply for portable use. In this example used to power up a Yaesu FT-817

HamGadgets.com - Manufacturer of morse keyers, ID-O-Matic Kit, electronic components

Naptech - Naptech buys and sells quality test equipment from hp, tektronix, including spectrum analyzers & peripherals, oscilloscope, frequency counters timers, signal generators, multimeters & voltmeters, RF & power meters, microwave amplifiers

Filtroid - Filtroid is an extremely easy-to-use program for synthesizing microwave filters. It can be used to design practically all filter types from audio to microwave frequencies as well as amplitude and delay equalizers and attenuators.

Tone Sound Frequency Sweep Generator - Generating of up to eight independent oscillatory processes per each channel with separate frequency, initial phase and amplitude controls.

Voice Keyer - The Voice Keyer is a free Windows based voice keyer. It is very easy to use and it handles up to seven messages. By connecting your computer soundcard to your radio it's possible to just press a button and the computer will CQ for you, to spare your voice. It can also PTT your radio via the LPT port by SM3WMV

Covert a Zetagi Amplifier for 50 Mhz - Schematics and instruction to convert a ZetaGi CB linear amplifier to 50 mhz band

RF Amplifier basics - Introduction to RF power amplifiers. Basics and guidelines. by wb0nni

Amplifier for 15 and 17 meter band - The two linear amplifiers are ment for use with QRP SSB/CW/FM/AM transmitters on the amateur bands 15 and 17 meters can be powered from a 12 volt DC supply by ON6MU

144 MHz Amplifier using 2xGS-35B - This 144 MHz PA is using 2xGS-35B tubes. It was build by Joel F6JMT for the Radio Club of Fontainebleau F8KTH

Two PIC-Based Keyers - By Andy Palm N1KSN

HV power supplies - WV0NNI 2,800 VDC @ 2 Amps Continuous Variac adjusts filament voltage. A voltage doubler circuit, well suited for smaller, compact linear amplifiers.

Multi-functional Power Supplies - Two types of multi-functional Home-brew 6/8Amps - 20 Ampere variable power supplies by ON6MU

12/20 Ampere power supplies - Two types of home-brewed 12/20 Ampere 13,8volt power supplies, including detailed part lists by ON6MU

Designing Op Amp Audio PreAmplifiers - Design guidelines for Op Amp audio preamplifier circuits by Mike Martell N1HFX