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).
Letter regarding a dynamo charge system fault on a Phantom II car, discussing regulator issues and noise suppression methods.
| Identifier | ExFiles\Box 168a\3\ img286 | |
| Date | 24th February 1936 | |
| c. to H.{Arthur M. Hanbury - Head Complaints} c. to Hd{Mr Hayward/Mr Huddy}/SB.{Mr Bull/Mr Bannister} c. to N. 86142 HA/Wat.l/WA.{Mr Wallis} 24th February, 1936. Mr. W.S. Verralls, Messrs. E.K. Cole, Ltd., Ekco Works, SOUTHEND-ON-SEA. Dear Mr. Verralls, Our Service Dept., has informed me of the trouble you have been experiencing with the dynamo charge system on your Phantom II car 163-TA. Personally, from the written evidence available, I am of the opinion that the regulator is faulty caused initially by the fitting, if only for a short time, of a condenser noise suppressor to the dynamo field circuit. I have been in touch with your Mr. R.I. Cowley, who I have met at your Works, on this very question as we have definitely established the fact that the regulator will fail or become erratic if any capacitance is inserted anywhere in the field circuit in such a way as to be virtually connected across the first pair of regulator contacts. The only method of noise suppression we recognise is to connect a 1 micro farad condenser to the main positive terminal of the dynamo and to use a metal braided earthed screened lead between the dynamo field terminal and the regulator and possibly also from the dynamo field fuse to the regulator, it is largely a matter of experiment with each car. | ||