transmitter

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More UHF Cheap Yagi Antennas - A collection of 450 MHz Cheap Yagis that have proven great portable operations, back-packing and transmitter hunts, and are something inexpensive you can throw up in the attic for that weak repeater
[ Hits: 210 | Votes: 0 | Rating: 0 ]

World of Receivers and Transmitters - A searchable database of online websdr receivers, lists OpenWebRX, KiWi SDR and WebSDR from all over the world, providing a web interface to search and filter links to websdr
[ Hits: 307 | Votes: 3 | Rating: 4 ]

QRP - Low Power Operating ARRL - QRP is a way of operating that involves using low power transmitters, that are no more than 5 Watts for Morse or data modes, or 10 Watts pep for voice. Introduction to QRP operations
[ Hits: 73 | Votes: 1 | Rating: 8 ]

N6QAB Hidden Transmitter Controllers - When it is time for you to hide a Hidden Transmitter there are several ways to control the transmission timing and audio of the transmitter.The most basic of these is of course the manual method of hiding in the bushes with your trusty HT and talking on and off for several hours.
[ Hits: 61 | Votes: 0 | Rating: 0 ]

K1IW Amateur Repeater and Broadcast Transmitters Database - Use this form to generate a list of amateur repeaters and broadcast transmitters to your specifications. The database covers the fifty U.S. states, the District of Columbia, and the ten Canadian provinces.
[ Hits: 92 | Votes: 0 | Rating: 0 ]

Chinese uSDX Review - A review of the Chinese version of uSDX USDR HF QRP Transceiver. Author made an extensive review of receiver and transmitter features.
[ Hits: 279 | Votes: 1 | Rating: 10 ]

IC-706 mk2 Modifications - The 5 MHZ and MARS Mod, transmitter power max modification
[ Hits: 105 | Votes: 0 | Rating: 0 ]

IC-7300 Bluetooth Support - It is possible to add a very small Bluetooth transmitter to the 3.5mm headphone jack and then use a pair of Bluetooth headphones around the shack. In this article Author provides some tips on choosing the proper Bluetooth interface.
[ Hits: 286 | Votes: 4 | Rating: 7 ]

Explaining ARRL Radio Tech Reviews - Explaining ARRL Technical Reviews of Radios a brief tutorial on radio testing. The ARRL Lab tests radio equipment according to standardized test procedures, using calibrated professional test equipment. Info on transmitter and receiver tests
[ Hits: 119 | Votes: 0 | Rating: 0 ]

DCF77 - DCF77 is a time signal transmitter operated by the Physikalisch-Technische Bundesanstalt (PTB). It broadcasts on a frequency of 77.5 kHz and is widely used for time synchronization in Europe.
[ Hits: 57 | Votes: 1 | Rating: 10 ]

Digital SWR and Power Meter - This module is an analogue and digital SWR and power meter/monitor, designed to replace analogue SWR and power metering in an AM Transmitter project.
[ Hits: 268 | Votes: 0 | Rating: 0 ]

The G4AON SSB Transmitter - This transmitter covers the 160, 80, 40 and 20 metre bands and provides both SSB and properly generated CW. The CW side of this transmitter is not compromised and produces excellent CW. On SSB the audio has been tailored to provide a rising response to 3 KHz, with a sharp drop above that frequency. There is RF speech clipping to both provide more "punch" and to limit the peak output.
[ Hits: 181 | Votes: 2 | Rating: 9.5 ]

The 6CL6-807 Transmitter - This page is a detailed description of a 6CL6 and 807 valve transmitter. The page includes the complete circuit diagram to build this transmitter and several pictures
[ Hits: 253 | Votes: 1 | Rating: 10 ]

Preventing CW key clicks - Key clicks are generally undesired clicks or thumps generated by a CW transmitter as the key is put down or let up. How much does the rise time or bandwidth of a CW signal need to be limited to prevent other QSOs on adjacent frequencies from being annoyed by key clicks?
[ Hits: 93 | Votes: 0 | Rating: 0 ]

Gimme Five - QRP SSB Transceiver - Gimme Five reloaded, a compact 5 band QRP SSB transceiver in SMD technology. This unit covers 5 bands within the amateur radio spectrum (3.5, 7, 14, 21 and 28 MHz). Receiver is a single conversion unit with an interfrequency of 9 MHz. Transmitter uses 5 stages and has got a power level of 10 watts PEP output.
[ Hits: 285 | Votes: 1 | Rating: 10 ]

QRP 20m Transmitter - The 1 watt 20 meter QRP transmitter with VXO. This is a nice QRP transmitter that can be used in combination of one of the simple receivers.
[ Hits: 151 | Votes: 0 | Rating: 0 ]
17 meter QRP Transmitter - 1-watt 17-meter cw transmitter that was originally done about 10 years ago as a club project for RAMS, the Radio Amateur Megacycle Society. It uses a VXO, rather novel at the time. It also uses a bandpass filter at the output rather than the usual lowpass
[ Hits: 122 | Votes: 0 | Rating: 0 ]

PiFox - Raspberry pi powered fox hunt transmitter. pifox is a script written by KM4EFP to configure, control, and deploy a Raspberry Pi as a fox hunt transmitter. No external radio needed use your Pi's gpio output as a radio transmitter.
[ Hits: 31 | Votes: 0 | Rating: 0 ]

Two Tone Generator - A two tone generator is an essential test gear made with just four transistors that helps you evaluate your amplifiers, mixers, receivers for distortion. Distortion makes all the difference between a pleasant receiver and a horrible sounding one, between a clean transmitter and bad, splattering one on air.
[ Hits: 81 | Votes: 0 | Rating: 0 ]

2m to 70cm Transverter Circuit - A 70cm / 432 MHz Transverter Project transverter circuit is an electronic device that converts a radio signal from the 2 meter to the 70 centimeter band and vice versa, allowing a single transmitter/receiver to be used for both bands. It consists of an IF stage, local oscillator, frequency multiplier, and amplifier. The circuit must be designed for minimal signal loss, noise and intermodulation distortion.
[ Hits: 82 | Votes: 0 | Rating: 0 ]