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).
Methods to eliminate electrical and radio interference caused by the regulator and brake static.
| Identifier | ExFiles\Box 168b\1\ img275 | |
| Date | 6th May 1938 guessed | |
| -3- Another method of removing this interference was then adopted and the results obtained far exceeded the previously stated ones. A heavy flexible copper conductor about 8" long was securely bolted on to the dash and from there to the engine a similar conductor was then connected between the engine and the chassis. The results obtained were very gratifying and the interference from the regulator was almost entirely removed. The whole object of loading all the metal work of the engine and chassis together is to make certain that there is a good electrical contact between them and therefore at a uniform electrical potential to the high frequency sources. This shows the care that must be taken to ensure that a good electrical contact is obtained for radio purposes, and is of particular importance where the elimination of interference is required. Interference from Brake Static on 2-R-50. The car had its brake system overhauled and had new brake linings fitted. As a result of this there was very severe interference caused by friction between the brake linings and brake drums. This was proved by two means, the first being a gentle application of the brakes whilst the car was running. By this means it was shown that the interference was greatly reduced. The second method was by running the car through water and thoroughly wetting the brakes and their associated components and testing the radio immediately afterwards. It was found that as long as the brakes were wet the interference was not taking place, but once they were again dry it returned. This car had springs fitted inside the hub caps for earthing the axle, and upon removing it was found that they were covered with grease, and therefore not making good contact. They were cleaned and replaced and upon testing a considerable improvement was noticed in the reduction of interference from this source. ---- | ||