| Description | Date | Identifier | |
| Letter to C.A.V. Bosch Ltd. confirming the direction of rotation for a DBR dynamo and regulator. | 6th Apr 1932 | Box 60 \ 3 Scan147 | |
| On ignition, confirming the old coil was insufficient for the high compression 20/25 HP engine. | 7th Apr 1932 | Box 60 \ 3 Scan148 | |
| Investigating low-speed misfiring, considering reducing spark plug gaps and the impact on slow running quality. | 9th Apr 1932 | Box 60 \ 3 Scan149 | |
| Chassis battery ignition misfiring at low speeds and the improved performance of a new coil. | 4th Mar 1932 | Box 60 \ 3 Scan150 | |
| Spark plug gaps, misfiring issues, and the potential impact of tungsten contact points. | 8th Apr 1932 | Box 60 \ 3 Scan151 | |
| The decision and process for testing a plain shunt dynamo on chassis 19-EX as an alternative to a Bosch regulated dynamo. | 19th Apr 1932 | Box 60 \ 3 Scan152 | |
| Experimental modifications and testing of plain shunt chassis dynamos and voltage regulators. | 20th Apr 1932 | Box 60 \ 3 Scan153 | |
| Investigation and technical description of a C.A.V.-Bosch shunt wound dynamo and regulator. | 27th Apr 1932 | Box 60 \ 3 Scan154 | |
| Output performance test results for a machine and its regulator, including a comparison of different regulator types. | 27th Apr 1932 | Box 60 \ 3 Scan155 | |
| Letter apologising for a delay regarding ignition parts for trial. | 27th Apr 1932 | Box 60 \ 3 Scan156 | |
| Letter from C.A.V - Bosch Ltd confirming arrangements to supply a B2 regulator as requested. | 13th May 1932 | Box 60 \ 3 Scan157 | |
| Sending copies of the patent specification for the latest Bosch chassis dynamo voltage regulator. | 25th May 1932 | Box 60 \ 3 Scan158 | |
| The dispatch of a loaned Mark II voltage regulating motor to R.A.E. Farnboro for examination. | 28th May 1932 | Box 60 \ 3 Scan159 | |
| Letter to the Royal Aircraft Establishment regarding issues with a 1000 Watt Dynamo voltage regulating motor. | 28th May 1932 | Box 60 \ 3 Scan160 | |
| Extract from minutes of a conference regarding the 20/25 dynamo position. | 31th May 1932 | Box 60 \ 3 Scan161 | |
| Letter to Joseph Lucas Ltd. regarding the bulk supply of C.A.V.-Bosch regulators, separate from a dynamo. | 17th Jun 1932 | Box 60 \ 3 Scan162 | |
| Letter from Joseph Lucas Limited acknowledging a query about C.A.V. Bosch Regulators. | 22th Jun 1932 | Box 60 \ 3 Scan163 | |
| Letter from Joseph Lucas Limited regarding the dispatch of a Dynamo and Voltage Regulator Control Board. | 6th Jul 1932 | Box 60 \ 3 Scan164 | |
| Potential changes and improvements to the 25HP dynamo, including the implementation of vibrator control. | 14th Jul 1932 | Box 60 \ 3 Scan165 | |
| The replacement of a C.A.V. Voltage Regulator on chassis 19-EX. | 13th Aug 1932 | Box 60 \ 3 Scan166 | |
| Testing and potential adoption of a C.A.V. dynamo voltage regulator for the 40/50 chassis. | 2nd Sep 1932 | Box 60 \ 3 Scan167 | |
| Letter from Joseph Lucas Limited regarding the dispatch of a Regulator Resistance. | 8th Sep 1932 | Box 60 \ 3 Scan168 | |
| The supply and use of a C.A.V. Bosch B2 regulator with a Dynamo. | 20th Sep 1932 | Box 60 \ 3 Scan169 | |
| Testing and potential adoption of a C.A.V. Dynamo Voltage Regulator for the 40/50 chassis. | 2nd Sep 1932 | Box 60 \ 3 Scan170 | |
| Order for four C.A.V. voltage regulators type B.2. | 21th Sep 1932 | Box 60 \ 3 Scan171 | |
| Supply and pricing of B2 Regulators from the Lucas Company following a discussion with Hs/Wst. | 27th Sep 1932 | Box 60 \ 3 Scan172 | |
| Fitting a voltage-regulated dynamo scheme on SG's car. | 27th Sep 1932 | Box 60 \ 3 Scan173 | |
| Letter to L. M. & S. Carriage and Wagon Dept. regarding a new patented system of voltage control for train lighting dynamos. | 5th Oct 1932 | Box 60 \ 3 Scan174 | |
| Alterations for incorporating a vibrator regulator control in the 20/25 and other chassis. | 11th Oct 1932 | Box 60 \ 3 Scan175 | |
| Letter from the London Midland and Scottish Railway Company arranging a meeting to discuss a new controller. | 11th Oct 1932 | Box 60 \ 3 Scan176 | |
| Letter to the Assistant Chief Mechanical Engineer of L.M.&S. Railway Co. requesting a diagram and description of a new dynamo controller. | 13th Oct 1932 | Box 60 \ 3 Scan177 | |
| Feedback on proposed alterations to the Chassis Dynamo Vibrator Regulator and a request for a specimen. | 17th Oct 1932 | Box 60 \ 3 Scan178 | |
| Letter from the London Midland and Scottish Railway Company providing a diagram and description of the Wolverton type 'M.D' train lighting system. | 17th Oct 1932 | Box 60 \ 3 Scan179 | |
| Wiring, fittings and voltage control for the 'Peregrine II' project. | 2nd Nov 1932 | Box 60 \ 3 Scan180 | |
| Potential improvements for vibrator control, including hermetic sealing and dynamo design considerations. | 9th Nov 1932 | Box 60 \ 3 Scan181 | |
| Issues with dynamo commutator sparking at high speeds and proposed solutions. | 21th Nov 1932 | Box 60 \ 3 Scan182 | |
| Internal request to order a C.A.V. type B2 dynamo voltage regulator for order number 54856. | 21th Nov 1932 | Box 60 \ 3 Scan183 | |
| Issues with engine vibration affecting a newly fitted C.A.V. constant voltage vibrator regulator. | 10th Dec 1932 | Box 60 \ 3 Scan184 | |
| Experimental work report on modifying a 40/50 plain shunt dynamo to improve its electrical performance and reduce high-speed sparking. | 25th Jan 1933 | Box 60 \ 3 Scan185 | |
| Proposal for an experimental modification involving 20 SWG field winding to improve a machine. | 25th Jan 1933 | Box 60 \ 3 Scan186 | |
| Instruction to remount a C.A.V. voltage regulator from vertical to horizontal on the 4.Per.II chassis. | 23th Feb 1933 | Box 60 \ 3 Scan187 | |
| Proposing a new switchbox and discussing vibrator control for dynamos. | 28th Feb 1933 | Box 60 \ 3 Scan188 | |
| Adoption of vibrator control and related issues with dynamo failures on experimental chassis. | 1st Mar 1933 | Box 60 \ 3 Scan189 | |
| Proposed fitting and testing of vibrator-controlled dynamos for various chassis models. | 3rd Mar 1933 | Box 60 \ 3 Scan190 | |
| Difficulties and experiments related to commutator sparking in a dynamo at high speeds. | 3rd Mar 1933 | Box 60 \ 3 Scan191 | |
| Visit to Messrs. Lucas to discuss the fitting of C.A.V. voltage regulators to R.R. dynamos. | 3rd Mar 1933 | Box 60 \ 3 Scan192 | |
| Shunt dynamo performance, commutation sparking, and the required change in ammeter type. | 3rd Mar 1933 | Box 60 \ 3 Scan193 | |
| Voltage regulator units, requesting production instructions following successful tests and units for experimental cars. | 3rd Mar 1933 | Box 60 \ 3 Scan194 | |
| Experiments and requirements for a 40/50 and Bensport shunt dynamo for vibrator control. | 4th Mar 1933 | Box 60 \ 3 Scan195 | |
| Insufficient battery charging in car 58-GN following the experimental fitting of a Vibrator Control. | 8th Mar 1933 | Box 60 \ 3 Scan196 | |
| Letter requesting a meeting to discuss the servicing of voltage vibrator controlled dynamos on chassis and buses. | 10th Mar 1933 | Box 60 \ 3 Scan197 | |
| The dynamo and voltage regulator for the 10,000 miles test car 18.G4. | 10th Mar 1933 | Box 60 \ 3 Scan198 | |
| Request to dispatch a C.A.V. voltage regulator unit to Lucas Ltd. for testing. | 10th Mar 1933 | Box 60 \ 3 Scan199 | |
| Instructing the Experimental Department to build two Bensport chassis with specific vibrator control dynamos. | 10th Mar 1933 | Box 60 \ 3 Scan200 | |
| Issues with the battery-dynamo vibrator control on car 58-GN. | 10th Mar 1933 | Box 60 \ 3 Scan201 | |
| Charging issues related to a vibrator control and dynamo on car 58 GN. | 13th Mar 1933 | Box 60 \ 3 Scan202 | |
| Issues with a vibrator control system, battery charging, and sulphation. | 13th Mar 1933 | Box 60 \ 3 Scan203 | |
| Investigation into a potential dynamo fault on car 58-GN, comparing it to the correctly functioning Peregrine. | 13th Mar 1933 | Box 60 \ 3 Scan204 | |
| Order for three C.A.V. Bosch regulators with specific operating parameters. | 13th Mar 1933 | Box 60 \ 3 Scan205 | |
| Instruction to run a 10,000-mile test on component 18.G4 with a vibrator controlled dynamo, requiring the removal of the magneto. | 14th Mar 1933 | Box 60 \ 3 Scan206 | |
| Technical memorandum discussing the design of a dynamo's vibrator control, focusing on winding configurations and commutator performance. | 14th Mar 1933 | Box 60 \ 3 Scan207 | |
| Confirming a telephone call about arranging a car for work on the Vibrator Control. | 14th Mar 1933 | Box 60 \ 3 Scan208 | |
| Letter from the Eastern National Omnibus Co. Ltd. discussing the dynamos and regulators used in their fleet. | 15th Mar 1933 | Box 60 \ 3 Scan209 | |
| Page 2 of a letter from an omnibus company discussing repair costs and dynamo/battery maintenance experiences. | 15th Mar 1933 | Box 60 \ 3 Scan210 | |
| Letter from The Eastern National Omnibus Co., Ltd. regarding battery charging and lamp bulb performance. | 15th Mar 1933 | Box 60 \ 3 Scan211 | |
| Insufficient charging issue on car 58-GN, caused by a faulty C.A.V. regulator. | 17th Mar 1933 | Box 60 \ 3 Scan212 | |
| Analysis of vibrator-controlled dynamo system performance on chassis, based on different customer driving habits and electrical loads. | 17th Mar 1933 | Box 60 \ 3 Scan213 | |
| Analysis of dynamo performance and electrical load requirements for various chassis models. | 17th Mar 1933 | Box 60 \ 3 Scan214 | |
| Comparison of a third brush dynamo with a vibrator controlled dynamo, outlining its advantages. | 17th Mar 1933 | Box 60 \ 3 Scan215 | |
| Letter regarding issues with constant voltage dynamos, specifically sparking on the commutator at high speeds. | 17th Mar 1933 | Box 60 \ 3 Scan216 | |
| Explaining experiments with series turns on shunt dynamos to suppress sparking at high speeds. | 18th Mar 1933 | Box 60 \ 3 Scan217 | |
| Letter from an omnibus company regarding their experience with dynamo commutator sparking at high speeds. | 21th Mar 1933 | Box 60 \ 3 Scan218 | |
| Page two of a letter from The Eastern National Omnibus Co., Ltd. regarding a machine's maintenance over three years. | 21th Mar 1933 | Box 60 \ 3 Scan219 | |
| Fault with a vibrator controlled dynamo system that failed to charge correctly. | 29th Mar 1933 | Box 60 \ 3 Scan220 | |
| Failure and incorrect mounting of a voltage regulator in the Vibrator Control Dynamo System for car 58-GN. | 30th Mar 1933 | Box 60 \ 3 Scan221 | |
| The testing of a newly fitted vibrator control and dynamo on car 58-GN. | 3rd Apr 1933 | Box 60 \ 3 Scan222 | |
| The deletion of the ammeter on the chassis and the implications for checking dynamo function. | 3rd Apr 1933 | Box 60 \ 3 Scan223 | |
| Request to issue experimental drawings for fitting a vibrator regulated dynamo system to a Bensport chassis. | 20th Apr 1933 | Box 60 \ 3 Scan224 | |
| Specification for the 40/50 shunt dynamo and C.A.V. regulator for the Bensport chassis. | 29th Apr 1933 | Box 60 \ 3 Scan225 | |
| Endurance test results for Lucas and Bosch vibrator controlled dynamos. | 2nd May 1933 | Box 60 \ 3 Scan226 | |
| Requesting an update on the standardization of the Vibrator Control component. | 5th May 1933 | Box 60 \ 3 Scan227 | |
| Status of vibrator-controlled dynamos for various chassis. | 8th May 1933 | Box 60 \ 3 Scan228 | |
| High-speed endurance test of a vibrator-controlled dynamo for 40/50 and Bensport models. | 22th May 1933 | Box 60 \ 3 Scan229 | |
| Query regarding test results for a vibrator control dynamo, specifically concerning temperature rise and current output limits. | 24th May 1933 | Box 60 \ 3 Scan230 | |
| The performance and temperature testing of vibrator controlled dynamos on Bentley chassis. | 26th May 1933 | Box 60 \ 3 Scan231 | |
| Letter to Joseph Lucas & Co. Ltd. requesting a technical representative visit regarding the C.A.V. Type B2 Voltage Regulator. | 10th Jun 1933 | Box 60 \ 3 Scan232 | |
| Letter from Joseph Lucas Limited regarding the loan of a Portable High Tension Voltmeter for evaluation. | 16th Jun 1933 | Box 60 \ 3 Scan233 | |
| Follow-up letter to Joseph Lucas Ltd. regarding C.A.V. Type B2 Voltage Regulators. | 19th Jun 1933 | Box 60 \ 3 Scan234 | |
| Letter to Joseph Lucas Co. Ltd. enclosing a blueprint for a voltage regulator arrangement. | 11th Jul 1933 | Box 60 \ 3 Scan235 | |
| Technical memo detailing the implementation of a vibrator control system for the Phantom II, including changes to the distribution board, dynamo, and switchbox. | 25th Jul 1933 | Box 60 \ 3 Scan236 | |
| Details on the ignition warning light and instrument board arrangement for the 20/25 type vehicle. | 26th Jul 1933 | Box 60 \ 3 Scan237 | |
| Pencil sketch of the instrument board for a 40/50 model. | 27th Jul 1933 | Box 60 \ 3 Scan238 | |
| Combined mounting for the voltage regulator and distribution box on the Phantom II dashboard. | 27th Jul 1933 | Box 60 \ 3 Scan239 | |
| Standardisation and fitting of the Phantom II Vibrator Control. | 28th Jul 1933 | Box 60 \ 3 Scan240 | |
| Issues with a new C.A.V. regulator for Bensport chassis, recommending continued use of the older model. | 29th Aug 1933 | Box 60 \ 3 Scan241 | |
| Performance of test armatures for a Bensport and 40/50 HP dynamo. | 15th Sep 1933 | Box 60 \ 3 Scan242 | |
| Bench tests for the Bensport and 40/50 dynamo, detailing output loss at high speeds. | 14th Sep 1933 | Box 60 \ 3 Scan243 | |
| Experiments to reduce excessive iron loss in armature cores using pre-slotted plates and Stalloy material. | 14th Sep 1933 | Box 60 \ 3 Scan244 | |
| Conclusion of a test report on dynamo armature improvements and high-speed performance. | 14th Sep 1933 | Box 60 \ 3 Scan245 | |
| Clarifying the reasons for using a specific wire gauge in the 40/50 HP dynamo with a C.A.V. vibrator regulator. | 19th Sep 1933 | Box 60 \ 3 Scan246 | |
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