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 Welcome to our web site.

This site provides information about both dip meters and Grid Dip Oscillator (GDO) circuits. The links provided were selected based on availability and proven usage.

Some of the functions of the dip meter have been replaced by the antenna analyzer which can perform analysis and frequency performance of an antenna. However, the dip meter is used for resonance indication, primarily for circuits of transmitters, receivers, or other tank circuit elements. One additional feature that is not used much is the ability to determine relative Q of coils, whether toriods or air gap coils.

When cost is an issue, a dip meter can provide some similar functions and in a few cases can perform some specialized test functions that are not practical with an antenna analyzer. Example: Modulation oscillator, if a modulator is built into the dip meter, or externally modulated.

In this site, the acronym GDO (Grid Dip Oscillator) will be used synonomously with dip meter, understanding that solid state circuits are the modern replacement.
For those who wish to construct there own dip meters, you will find the links helpful from the variety of circuits shown and principles of design.
New Product
RF power head with high dynamic range, using Analog Devices chips.
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"A low cost piece of test equipment for the radio amateur."