From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Fitting 'Philco' car radios, discussing electrical interference suppression and correct wiring procedures.
Identifier | ExFiles\Box 63\3\ scan0038 | |
Date | 22th June 1934 | |
-4- Ha/Wst.R/WA.{Mr Wallis}22.6.34. Cont'd.{John DeLooze - Company Secretary} Dealing with (b) above it is perfectly safe to connect a good quality condenser of the circular ignition variety across the dynamo brushes to earth, voltage regulator contacts to earth, fuel pump, positive supply to earth, and the low tension terminal of the ignition coil to earth. This is actually what the "Philco" car radio people are doing and in general we have found that this firm is treating the question of this accessory interference in a very sound manner. It is not permissible to insert chokes in the ignition coil L.T. circuit or in the dynamo and regulator feed wires. With the use of proper condensers they are not necessary. With regard to (c) we have supplied the "Philco" Co., with a diagram of our chassis indicating to them the accessory fuse which we have provided for such connections. It is not permissible to make connection to our system anywhere else than at the distribution board or at junction boxes which are properly wired up to a fuse on the distribution board. Regarding (d) the "Philco" Co., have loaned us a complete radio set and Mr. H is looking into the question of recommending the correct place for fitting the same on our chassis. Car Radio is becoming so increasingly popular with R.R. and Bentley owners that we have considered it wise to make these positive recommendations regarding the fitting and connecting up of sets on our chassis. It might even be considered worth while to send out all our modern chassis properly equipped and covered by our guarantee for the installation of radio. This of course is being done in American and will be done by at least one British firm on 1935 models. Ha/Wst. | ||