| Description | Date | Identifier | |
| The delayed standardization of the R.R. type regulator. | 23th Sep 1936 | Box 166 \ 2 img047 | |
| And handwritten response concerning the potential standardization of new Lucas voltage regulators (DB.880). | 19th Oct 1936 | Box 166 \ 2 img048 | |
| Letter from Joseph Lucas Ltd detailing the dispatch and specifications of six type LR7 Voltage Regulator Units. | 16th Nov 1936 | Box 166 \ 2 img049 | |
| Letter from Joseph Lucas Limited confirming the despatch of 'insensitive' and thermostatic control regulators for endurance testing. | 16th Nov 1936 | Box 166 \ 2 img050 | |
| The specifications for LR7 regulators mounted on RF.50 control boxes. | 16th Nov 1936 | Box 166 \ 2 img051 | |
| Specifications and connection details for Thermostatic Regulators LT.0884, LT.0885, and LT.0886 mounted on RF.50 Control Boxes. | 18th Nov 1936 | Box 166 \ 2 img052 | |
| The construction of a No.5 resistance element for a multi-stage regulator. | 18th Nov 1936 | Box 166 \ 2 img053 | |
| In response to a query, stating no immediate alterations are planned for carbon brushes. | 1st Dec 1936 | Box 166 \ 2 img054 | |
| Requesting the replacement of a burnt-out regulator and its resistance unit on car 30-EX. | 2nd Dec 1936 | Box 166 \ 2 img055 | |
| Standardization timeline for a new Lucas voltage regulator and delays in ordering existing ones. | 3rd Dec 1936 | Box 166 \ 2 img056 | |
| Intermittent fault with the regulator on car 36-EX, requesting its removal and replacement. | 8th Dec 1936 | Box 166 \ 2 img057 | |
| Covering note for a blueprint of modifications to a multi-stage voltage regulator for all chassis. | 8th Jan 1937 | Box 166 \ 2 img058 | |
| Unsatisfactory testing of Lucas voltage regulators. | 19th Jan 1937 | Box 166 \ 2 img059 | |
| The fitting, testing, and ordering of Lucas Voltage Regulators. | 15th Jan 1937 | Box 166 \ 2 img060 | |
| Parts list for modifications to an experimental multi-stage regulator. | 15th Feb 1937 | Box 166 \ 2 img061 | |
| List of parts and quantities required for a new coil assembly. | 15th Feb 1937 | Box 166 \ 2 img062 | |
| Letter from Joseph Lucas Limited regarding a report on Plug Gaps. | 19th Feb 1937 | Box 166 \ 2 img063 | |
| Letter to Joseph Lucas Ltd. enclosing a production specification for a C.A.V. Bosch Regulator, Type B2CJI. | 23th Feb 1937 | Box 166 \ 2 img064 | |
| Requesting to try out a new Lucas combined regulator and cut-out unit on a Wraith chassis. | 25th Feb 1937 | Box 166 \ 2 img065 | |
| Revised specification for production tests of a combined cut-out and regulator unit. | 5th Mar 1937 | Box 166 \ 2 img066 | |
| Production inspection, adjustment, and test specification for the cutout and regulator unit on Phantom III and Bentley models. | 5th Mar 1937 | Box 166 \ 2 img067 | |
| Test procedures for a dynamo and cutout, specifying voltage, amperage, and resistance limits. | 5th Mar 1937 | Box 166 \ 2 img068 | |
| Testing procedure for cutout contacts and specifications for a resistance unit and regulator. | 5th Mar 1937 | Box 166 \ 2 img069 | |
| Instructions for positioning and testing a regulator unit, including connection details for a test rig. | 5th Mar 1937 | Box 166 \ 2 img070 | |
| Testing procedure for a dynamo and voltage regulator, detailing outputs at different voltages and conditions. | 5th Mar 1937 | Box 166 \ 2 img071 | |
| Instructions regarding the acceptable swing of a needle at various speeds. | 5th Mar 1937 | Box 166 \ 2 img072 | |
| The return of three L.R.7 type regulators to Messrs Lucas for modification. | 5th Mar 1937 | Box 166 \ 2 img073 | |
| Letter to Joseph Lucas & Co. Ltd. regarding a revised specification for the B.2/CJ.1. type regulator. | 5th Mar 1937 | Box 166 \ 2 img074 | |
| The forwarding of three L.R.7 type Regulators to Messrs. Lucas for modification. | 6th Mar 1937 | Box 166 \ 2 img075 | |
| Urgent instruction memo to fit a Lucas LR7T voltage regulator to a car in the Repair Department. | 15th Mar 1937 | Box 166 \ 2 img076 | |
| Letter to Lucas Ltd. concerning issues with a type LR.7.T. regulator. | 23th Mar 1937 | Box 166 \ 2 img077 | |
| Letter from Joseph Lucas Limited discussing an LR7T Regulator's thermostatic compensation. | 1st Apr 1937 | Box 166 \ 2 img078 | |
| Letter from Joseph Lucas Limited regarding the performance and modification of LR7T regulators. | 1st Apr 1937 | Box 166 \ 2 img079 | |
| Technical memo on trialling the Lucas L.R.7.T. voltage regulator to replace the unreliable C.A.V. model. | 5th Apr 1937 | Box 166 \ 2 img080 | |
| Letter to Joseph Lucas Ltd. detailing observations and requirements for Lucas Regulators type LR.7.T. | 5th Apr 1937 | Box 166 \ 2 img081 | |
| Test results for output current and charging a fully-charged battery under various conditions. | 5th Apr 1937 | Box 166 \ 2 img082 | |
| Technical note discussing the compromise between low and high currents in a divided series winding for a battery. | 3rd May 1937 | Box 166 \ 2 img083 | |
| Request for performance tests on Lucas regulators and further observation of a single wire petrol gauge. | 3rd May 1937 | Box 166 \ 2 img084 | |
| Requesting the issue of a scheme for a heat resisting field resistance due to regulator resistance burn outs. | 10th May 1937 | Box 166 \ 2 img085 | |
| Recurring burn-outs of regulator resistance units in four specific cars. | 10th May 1937 | Box 166 \ 2 img086 | |
| Responding to reports of regulator resistance burn outs, discussing investigation and proposing modifications. | 10th May 1937 | Box 166 \ 2 img087 | |
| Investigation into recurring regulator resistance unit burn-outs. | 10th May 1937 | Box 166 \ 2 img088 | |
| Burnt-out regulator resistance from Mr. Player's car, chassis GLJ-58. | 11th May 1937 | Box 166 \ 2 img089 | |
| Request to arrange road tests for a new Lucas regulator on experimental Wraith and 33-EX cars. | 25th May 1937 | Box 166 \ 2 img090 | |
| Requesting a change of voltage regulator on chassis 32-EX for a 10,000-mile test. | 5th Jun 1937 | Box 166 \ 2 img091 | |
| Modification to prevent regulator resistance unit burn-outs on all chassis, including required parts lists. | 10th Jun 1937 | Box 166 \ 2 img092 | |
| Anticipating delays in obtaining a porcelain bobbin and suggesting a synthetic substitute for testing. | 10th Jun 1937 | Box 166 \ 2 img093 | |
| Specification discrepancies with Messrs Lucas regarding C.A.V. regulators. | 23th Jun 1937 | Box 166 \ 2 img094 | |
| Rejection of C.A.V. Regulators, Type DB.880, due to specification conflicts. | 22th Jun 1937 | Box 166 \ 2 img095 | |
| Letter from Joseph Lucas Limited concerning cutout setting and regulator value issues. | 25th Jun 1937 | Box 166 \ 2 img096 | |
| Letter from Joseph Lucas Limited regarding the performance and testing of an ignition coil and an LRT7 regulator. | 1st Jul 1937 | Box 166 \ 2 img097 | |
| List of drawing numbers, models, and item names for ignition coil components. | 29th Jun 1937 | Box 166 \ 2 img098 | |
| Instructing the return of a failed Lucas Regulator for examination and refitment to a Wraith Chassis. | 29th Jun 1937 | Box 166 \ 2 img099 | |
| Faulty Lucas regulator being returned for examination after failing a bench test. | 30th Jun 1937 | Box 166 \ 2 img100 | |
| Letter regarding a hand-made sample of a proposed Double Tier Voltage Regulator and Junction Box sent for testing. | 16th Jul 1937 | Box 166 \ 2 img101 | |
| Letter to Joseph Lucas Ltd. acknowledging an experimental drawing for a voltage regulator and advising the sample has not yet been received. | 2nd Aug 1937 | Box 166 \ 2 img102 | |
| Requesting a drawing for a steel spring hinge to be made based on a bimetal sample. | 11th Aug 1937 | Box 166 \ 2 img103 | |
| Building the experimental Wraith III chassis with a C.A.V. regulator as the LR.7 regulator is not sufficiently developed. | 13th Aug 1937 | Box 166 \ 2 img104 | |
| Request for two different Spring Hinge parts for experimental work on the Lucas LR.7 Regulator. | 18th Aug 1937 | Box 166 \ 2 img105 | |
| Letter to a supplier regarding an issue with uncovered Brightray wire shorting in a resistance unit. | 26th Aug 1937 | Box 166 \ 2 img106 | |
| Blueprint distribution note for a modification to the Wraith III Cutout and Regulator LOP. | 31th Aug 1937 | Box 166 \ 2 img107 | |
| Specification for the inspection, adjustment, and testing of a cutout and regulator. | 28th Oct 1937 | Box 166 \ 2 img108 | |
| Testing procedure for a regulator's resistance unit and electrical performance. | 28th Oct 1937 | Box 166 \ 2 img109 | |
| Letter from Joseph Lucas Ltd. regarding the supply and specification of LR7 and LRT7 regulators. | 21th Sep 1937 | Box 166 \ 2 img110 | |
| Laboratory advice note detailing the settings for two LR7 Regulators. | 17th Sep 1937 | Box 166 \ 2 img111 | |
| The receipt and testing of two LR7 Regulators against the standard C.A.V. - Bosch B2.CJ-1 regulator. | 21th Sep 1937 | Box 166 \ 2 img112 | |
| Specifications and settings for LR7 regulators mounted on RF50 boxes, referencing the B2CJ-1 regulator. | 23th Sep 1937 | Box 166 \ 2 img113 | |
| Letter to Joseph Lucas Ltd. concerning the testing of horns and regulators. | 23th Sep 1937 | Box 166 \ 2 img114 | |
| Letter from Joseph Lucas Limited regarding the dispatch and technical specifications of a new LR7 Regulator. | 30th Sep 1937 | Box 166 \ 2 img115 | |
| Letter from Joseph Lucas Limited regarding the supply of LRT7 Regulators for testing purposes. | 1st Oct 1937 | Box 166 \ 2 img116 | |
| Laboratory advice note detailing the output figures for LRT7 Regulators under various conditions. | 30th Sep 1937 | Box 166 \ 2 img117 | |
| Request to order and test 'Glowray' resistance wire for a regulator unit, as the oxidised wire proved unsatisfactory. | 8th Oct 1937 | Box 166 \ 2 img118 | |
| Recommendation on the winding method for a C.A.V. Bosch Regulator Resistance Unit, concluding that it should be wound inductively to avoid extra cost. | 23th Oct 1937 | Box 166 \ 2 img119 | |
| Blueprints and required parts for the Wraith Cutout and Regulator Unit. | 26th Oct 1937 | Box 166 \ 2 img120 | |
| Alteration to the Wraith III Regulator & Resistance Unit. | 28th Oct 1937 | Box 166 \ 2 img121 | |
| Letter to Joseph Lucas Ltd. detailing the results of bench tests on LR.7 and LRT.7 type regulators. | 27th Oct 1937 | Box 166 \ 2 img122 | |
| Electrical current tests under hot conditions for various units and regulators. | 27th Oct 1937 | Box 166 \ 2 img123 | |
| The performance of regulators and cutouts, detailing test results and proposed modifications. | 27th Oct 1937 | Box 166 \ 2 img124 | |
| Suggestions for adjusting a regulator's winding turns and output amperage. | 25th Oct 1937 | Box 166 \ 2 img125 | |
| Experimental department report on Lucas Regulator & Cutout Units, concluding they are unsuitable for standardisation. | 25th Oct 1937 | Box 166 \ 2 img126 | |
| The investigation and testing of a Lucas Dynamo Regulator and Cutout unit. | 28th Oct 1937 | Box 166 \ 2 img127 | |
| Single-stage voltage regulator, discussing its design, fuse issues, and temperature characteristics. | 28th Oct 1937 | Box 166 \ 2 img128 | |
| Output current measurements at 13.0 Volts, comparing performance with and without a temperature compensating device under cold and hot conditions. | 28th Oct 1937 | Box 166 \ 2 img129 | |
| Performance, reliability, and lifespan of regulators, including output current measurements under cold and hot conditions. | 28th Oct 1937 | Box 166 \ 2 img130 | |
| The performance issues of a voltage cutout and regulator, with a summary and recommendations. | 28th Oct 1937 | Box 166 \ 2 img131 | |
| Action plans for the development of regulators and cutouts. | 28th Oct 1937 | Box 166 \ 2 img132 | |
| Test report on the fuse in the resistance unit circuit of a C.A.V. regulator, detailing failure modes and proposed improvements. | 18th Nov 1937 | Box 166 \ 2 img133 | |
| Letter to Joseph Lucas Ltd. detailing investigations into regulator and dynamo performance. | 26th Nov 1937 | Box 166 \ 2 img134 | |
| Test results for a regulator, detailing resistance values and output currents under various conditions. | 26th Nov 1937 | Box 166 \ 2 img135 | |
| Test report on output current measurements under various conditions, including cold, hot, and battery load scenarios. | 26th Nov 1937 | Box 166 \ 2 img136 | |
| Letter regarding the return of regulators and plans for further experiments on a compensated unit. | 26th Nov 1937 | Box 166 \ 2 img137 | |
| Request to arrange the return of several Lucas regulators to their makers after testing. | 29th Nov 1937 | Box 166 \ 2 img138 | |
| Requesting the forwarding of several Lucas Regulators to Messrs Lucas after completion of tests. | 1st Dec 1937 | Box 166 \ 2 img139 | |
| Request for instructions to fit a steel spring onto a Lucas regulator armature, replacing the existing bi-metal spring. | 7th Dec 1937 | Box 166 \ 2 img140 | |
| Letter to Lucas Ltd. concerning the specifications and supply of special electrical regulators. | 16th Dec 1937 | Box 166 \ 2 img141 | |
| Letter from Joseph Lucas Limited detailing the specifications of three voltage regulators sent for testing. | 31th Dec 1937 | Box 166 \ 2 img142 | |
| Visit to the offices and laboratory of Messrs. Lucas to discuss regulators and ammeters. | 4th Jan 1938 | Box 166 \ 2 img143 | |
| Confirming the receipt of three specially adjusted Lucas dynamo voltage regulators to address battery under-charging. | 9th May 1940 | Box 166 \ 2 img144 | |
| Testing a modified Lucas LR.7 type regulator to reduce the effect of temperature on its output characteristic. | 10th Jan 1938 | Box 166 \ 2 img145 | |
| Next steps for road testing regulators, specifically the placement of resistance units considering heat production. | 7th Jan 1938 | Box 166 \ 2 img146 | |
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