KA8MAV Builds a New England QRP Club Noise Bridge Kit

KA8MAV Builds a
NE QRP Club Noise Bridge Kit!

New England QRP Club - Noise Bridge Kit

Kit Contents: excellent
Board Quality: excellent
Part Selection: excellent
Manual: good
Build Difficulty: very easy
Functionality: TBD
Overall Quality: TBD

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Description

"A noise bridge is a a device for measuring or comparing impedances on coaxial cables, antennas, components, etc. With appropriate calibration, it allows for the measurement of both scalar and vector (reactive) impedances. A noise bridge contains a wideband noise generator as well as a bridge balancing circuit, and makes use of the station receiver, tuned to the frequency of measurement, as a detector. The bridge is balanced by changing a bridge capacitor and resistor while listening to the receiver for a noise null. Resistance and reactive values can be determined from the variable R and C positions, and may be converted to an SWR or Z value. The noise bridge may lack the precision of a laboratory instrument; however, it has sufficient capability for normal amateur use and can perform many of the measurements of more expensive instruments such as antenna analyzers. In addition, this version is only 1.1" x 2.75" and can easily be built into other projects." - New England QRP Club

Kit Contents

Schematic diagram, layout, and instructions on building and using the Noise Bridge

Purchase a New England QRP Club - Noise Bridge Kit

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