Subject: Whine Noise in Radio
Model and Year: All 1968 Vehicles
Source: Chevrolet Dealer Service Technical Bulletin
Bulletin No: 68-T-11
Date: January 2, 1968
TO: ALL CHEVROLET DEALERS
On some 1968 vehicles, reports or noise, described as Delcotron whine emanating from the radio speaker, have been received. This noise is most pronounced when the Delcotron charge rate is high and will vary in intensity when the volume control is adjusted.
An in-line filter designed to suppress Delcotron whine in radio speakers is now available through United Delco Distributors.
The filter should only be used after the following checks have been made to locate the source as being the Delcotron.
Note: Filter Coil Assembly is available through Delco Distributors only.
Chevrolet Motor Disivion
General Motors Corporation
Article ID: 1113
Created: January 18, 2015
Last Updated: January 18, 2015
Online URL: https://www.corvetteactioncenter.com/tech/knowledgebase/article/1968-corvette-service-bulletin-whine-noise-in-radio-1113.html