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Easy to use double tone IQ-generator for testing direct conversion SSB-transmitters based on phasemethod etc.

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Documents the operational experiences and technical insights of amateur radio station VA3STL, offering a firsthand account of various on-air activities and equipment. The blog features a detailed narrative of a **QRP transatlantic QSO** on 12m SSB, achieving a 55 report with 10W to a mobile station in Italy using a homebrew 90ft doublet antenna. It also introduces the _Ten-Tec 539_ QRP HF transceiver, a 10W output rig covering 80m through 10m, designed for portable operations and featuring DSP and dual VFOs. The resource also delves into historical radio technology, specifically the "Gibson Girl" survival radio, an emergency transmitter operating on 500kHz (and later 8280/8364 kHz) with a hand-cranked generator and kite-deployed antenna. This section explores its origins from German designs and its use during World War II, including its distinctive curved shape for ergonomic hand-cranking. Further historical content includes a visit to Signal Hill in St. John's, Newfoundland, commemorating Marconi's reception of the first transatlantic radio signal in 1901. The post describes the Cabot Tower exhibit and the VO1AA station, highlighting the site's significance despite the thick fog during the visit. It also showcases a homebrewed _Marconi-style straight key_ by WB9LPU, crafted to celebrate the centenary of Marconi's achievement.

Just a simple signal generator based on ADF4351 module from fleebay allows you to generate one single frequency that can go up or down in 100Khz steps via two push buttons.

A simple 2-tone-generator for testing the linearity of SSB transmitters. This device is as simple as useful. With 2 transistors and an oscilloscope, it is fairly easy to test the linearity of your SSB transmitter. The 2-tone-method is a standardized test method that can be used to determine the maximum output and the amplification characteristics of a sideband transmitter.

This document outlines the construction of a simple microwave noise source, leveraging mixer diodes, potentially from _John Watson, VE3EZP_'s collection. The design provides a basic schematic for a noise generator, primarily intended for go/no-go receiver sensitivity checks and comparative noise figure assessments. It produces noise levels approximately 20 dB above thermal noise, making it suitable for AM/SSB/CW receivers, but it is not calibrated for absolute noise figure measurements. The construction utilizes surface-mount components on 1/16 inch FR4 PC board, demonstrating functionality up to at least 10 GHz. An alternative version incorporating a _1N21_ diode is noted to operate effectively up to 5.76 GHz. The resource specifies that any microwave detector diode with a reverse breakdown voltage of a few volts is suitable for this application, providing practical guidance for replication.