signal generator circuit

The 160M No-Excuses Homebrew Vertical - 160m antenna designed for stations having a difficult time putting a decent signal on 160M from small or restricted lots.A 25 ft. vertical antenna, made from three 10 ft. PVC.

Z-Match Antenna Tuner project - This Z-Match is a link coupled all-band tuner. Two all band tank circuits cover 3-14mhz and 14-30mhz. The tank output links are selected with a very heavy duty SPDT rotary switch.

A PC as VLF receiver - Using a PC with soundcard as a VLF receiver, how to use your PC as a receiver for narrow-band signals in the VLF radio spectrum by DL4YHF

SB-220 Repairs and Modifications - Heathkit SB 220 mods, replacing the Zener ZD1, replacing the plate-voltage voltage divider, adding a keying circuit for solid state transceivers

A NiCAD Battery Charger - A NiCAD Battery Charger with Current and Voltage Limiting

About Cavity Filters - Cavity filters are tipically circuitry behind a duplexer that allow only certain frequencies to pass

RF Sampler - This circuit will let you look at the signal and frequency output of your transceiver.

23cm Signal Generator - A 23 signal source project by W6PQL

Simple RF Generator - A simple RF Generator project by YO5HHP

Circuit Improvements for the TS-440S - Some improvements for the Kenwood TS-440S, including distortion level in SSB in transmitted signals, Lack of crispness in the RX audio and Limited transmit frequency coverage.

Signalink USB Interface - Setup notes - Hints and Tips in using the Tigertronics SignalinkUSB External USB Sound Card and Interface

Signalink USB and Yaesu FT-857D - This webpage describe how to set up the Signalink USB interface and Yaesu FT-857D for digital operations by NA4IT

Grip Dip Oscillator - Originally eveloped by I1FLC, uses seven plug in coils covering 3.0 to 30Mhz in a Colpitts oscillator circuit.

Build a Test Meter - This article include a circuit that allows a cheap 0-1mA meter to be used as a micro-ammeter or a milli-voltmeter

Make your own multimeter - Homebrew a multimeter with this article

TV To Scope Converter - This project takes after the VGA-to-Scope converter by using composite video rather than VGA signals to create a display on an oscilloscope.

Multiple viewer for your oscilloscope - You can measure 4 signals at one time by this machine. A project for single view oscilloscopes

RF Probe circuit - This RF probe circuit allows RF to be measured in the presence of DC

RF Probe for HF - A RF Probe circuit for the RADIO frequency experimenter to check the presence of a RF signal and also to measure its strength

RF Probs and Watt meter - This RF probe can be used at High Frequency (HF) or Ultra High Frequency (UHF) on both 50 and 75 ohm coaxial cables.

Germanium Noise Generator - This generator requires 100volts supply at 5mA. A 0 -5 mA meter inserted at J1 measures the crystal current.

A DIY Square Wave Signal Generator - This circuit is very simple and has a fantastic range of potential uses.

ZL2PD HF RF Signal Generator - This circuit came out of some work done for two antenna analysers

SA5BKE Simple signal generator - A simple DIY signal generator based on NorCal QRP club kit

Analog HF Antenna Analyser - A simple antenna analyser for the HF spectrum with a built-in signal generator with 3-digit LED frequency display.