photograph of a headstock being strung
Edge guitar services

Eltham Jones, guitar repair and technical services :Bristol : Cardiff : Bridgend : Tel. 07971 240296

Guitar cavity before screening
Guitar cavity after screening

The trace at the top is typical of the spike waveforms produced by fluorescent lighting and computer monitors. If you look carefully you can see the shadow of the ambient hum.

Below is the trace from the same guitar after screening. The ambient mains hum hum which is always present at a very low level is still there but the spiky noise signal previously picked up by the unscreened circuitry has been successfully attenuated.

© Eltham Jones, EDGE Guitar Services

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