40m receiver

40m & 80m portable wire antenna - G8ODE antenna project, where the 40m & Short 80m antenna was deployed as a sloping wire antenna using the 10M fibre glass fishing pole and a hook on the house's gutter-board

Duoband DK7ZB-Yagis 2m and 70cm  ^updated - These Yagis cover the range of 144-146MHz on 2m and 430-440MHz on 70cm. They can be used for alle modes (FM and SSB/CW). On both bands the SWR is good across the whole band.

WebSDR in Czech Republic - 80 meter WebSDR receiver by OK1KPU in castle Doubravka Czech republic

WebSDR in Canada - WebSDR receiver located at the University of British Columbia Amateur Radio Society by VE7KA

Online websdr from Bulgaria - This is a WebSDR receiver, located in Sofia, Bulgaria, hosted by LZ1QRM.

30 Meters receiver - A simple 30 meters receiver for low power QRSS Beacons and PSK31

80m fox hunting receiver - Schematic anc PCB for a fox hunting receiver for 80 meters band

80m sniffer - A full superhetrodyne SSB fox hunting receiver kit

80M Fox-Or-Test Transmitter - The 80 metre fox-or/test transmitter is a small low power transmitter which is designed to be used as an alignment aid for running up 80 metre foxhunt or ARDF receivers. It is also usable as a micro transmitter for fox-or-ing events.

How Satellite Doppler Tracking Works - The Doppler Effect allows the distance between a satellite transmitting from space and a radio receiver on the ground to be measured by observing how the frequency received from the satellite transmitter changes as the satellite approaches, passes overhead, and moves away.

Moonraker 4 Antenna manual - English manual of the AV-140Moonraker 4 antenna

How to Measure Receiver Sensitivity - Testing an Elecraft K2 sensivity using a signal generator, headphones and an AC Voltmeter

A 2.3GHz to 432MHz receiver converter - Receiver converter that can be plugged to the backside of the Yaesu FT-817 battery powered portable transceiver

Buying a shortwave receiver - This article will provide an overview of the different types of receiver available and the associated pro’s and con’s.

TK3 for IC-R3 - tk3 is open source software designed for the ICOM IC-R3 receiver. Though tk3 is intended chiefly for Linux, MacOS X, and BSD users, it will work on Microsoft Windows too.

Friis-It NF for iPhone - Friis-It NF is the first iPhone OS based application that allows you to calculate noise figure, system sensitivity, and cascaded gain for an RF Receiver system

iSDR - iSDR is a software defined radio application compatible with the Apple iPhone, iPod touch and iPad™. iSDR is designed for experimenters, shortwave listeners, and amateur radio enthusiasts who would like a truly portable software-defined radio receiver.

A 40 meter QRP Transceiver - A 7 MHz homebrewed QRP transceiver project with full schematic and detailed pictures by DL5NEG

A simple receiver - A very simple receiver project by PA2OHH

Receiver Dynamic Range - Receiver dynamic range is the ability of a receiver to receive a weak signal without loss of readability while a strong signal is present.

40 m Band Direct Conversion Receiver - Practical and usable direct conversion receiver for the 40 m CW band

WB9JPS Direct-Conversion Receiver - Direct-Conversion Receiver project

What Does Your S-Meter Reading Mean - Two receivers compared, Drake R8A and Palstar R30

Realistic DX-100L mod - Modifications and improveents for the realistic DX-100L HF receiver by ON6MU

A 2 tube regenerative receiver - A low voltage 2 tube regenerative receiver