| Description | Date | Identifier | |
| Production test procedure for an 18,000 turn taller type ignition coil in a Reimanol case. | 15th Oct 1926 | Box 69 \ 1 scan0041 | |
| Test procedures for a distributor and ignition coil, detailing current, voltage, and spark gap specifications. | 11th Oct 1926 | Box 69 \ 1 scan0042 | |
| Electrical experimental record sheet for the testing of an E.A.C. coil in a redmanol case (NO PRI). | 11th Oct 1926 | Box 69 \ 1 scan0043 | |
| Electrical experimental record sheet for an E.A.C. coil in a Redmanol case, part number NO PR2. | 11th Oct 1926 | Box 69 \ 1 scan0044 | |
| Electrical experimental record sheet for an E.A.C. coil in a Redmanol case, number PR3. | 2nd Jan 1926 | Box 69 \ 1 scan0045 | |
| Requesting the production of a finer primary coil (GP.11) for the 2nd EAC.7 chassis, designated 15-EX. | 30th Nov 1926 | Box 69 \ 1 scan0046 | |
| The development of a production test for ignition coil cases made from Redmanol material. | 13th Apr 1927 | Box 69 \ 1 scan0047 | |
| Test results and conclusions on resistance changes with temperature for various coil cases. | 26th Apr 1927 | Box 69 \ 1 scan0048 | |
| Letter regarding the return of six scratched redmanol ignition coil cases and proposing a revised testing schedule. | 26th Apr 1927 | Box 69 \ 1 scan0049 | |
| Regular electrical testing of 10% of ignition coil cases to check insulation quality. | 28th Apr 1927 | Box 69 \ 1 scan0050 | |
| High tension D.C. testing of Redmanol coil cases at temperatures up to 100°C, proposing a specification for insulation tests. | 4th May 1927 | Box 69 \ 1 scan0051 | |
| Report page detailing electrical insulation test procedures and results for condensers and coils, including measurement tables. | 4th May 1927 | Box 69 \ 1 scan0052 | |
| Data table showing results from electrical leakage, voltage, and ratio tests on components under different conditions. | 5th May 1927 | Box 69 \ 1 scan0053 | |
| Production test results for Redmand Coil Cases. | 5th May 1927 | Box 69 \ 1 scan0054 | |
| Instructions for an experiment on a newly designed coil with less iron in the magnetic circuit. | 25th Jun 1927 | Box 69 \ 1 scan0055 | |
| Test results for a coil's primary and secondary windings, including resistance, impedance, and inductance. | 8th Dec 1924 | Box 69 \ 1 scan0056 | |
| Re-testing of Ignition Coil No. 4554 on an engine after it passed bench tests. | 20th May 1927 | Box 69 \ 1 scan0057 | |
| Delivery schedule of coil cases required for insulation testing. | 27th May 1927 | Box 69 \ 1 scan0058 | |
| Specification for insulation testing of Redmanol coil cases at various temperatures. | 8th Jun 1927 | Box 69 \ 1 scan0059 | |
| Leakage and insulation resistance test results for four coil cases. | 10th Jun 1927 | Box 69 \ 1 scan0060 | |
| The results of an insulation test for a coil case after re-baking. | 18th Jun 1927 | Box 69 \ 1 scan0061 | |
| Tested Redmanol coil cases failing requirements and the recommendation for the batch to be re-baked. | 5th Jul 1927 | Box 69 \ 1 scan0062 | |
| Chasing an overdue batch of coil cases for testing. | 23th Aug 1927 | Box 69 \ 1 scan0063 | |
| Confirming the return of two redmanol coil cases after successful insulation tests. | 8th Sep 1927 | Box 69 \ 1 scan0064 | |
| The failure analysis of an E.J.B's coil after a 9600-mile bench test and the performance of its tungsten contact points. | 19th Oct 1927 | Box 69 \ 1 scan0065 | |
| Instructions for testing a coil with 1/3 less iron in its core and a 50% longer ballast. | 20th Oct 1927 | Box 69 \ 1 scan0066 | |
| Bench test results for an old standard coil and double ballast ignition system. | 21th Oct 1927 | Box 69 \ 1 scan0067 | |
| Technical memo discussing improvements to the battery ignition system, including contacts, distributor tracking, and coil design. | 12th Sep 1927 | Box 69 \ 1 scan0068 | |
| To Mr. Brock regarding the return of a faulty ignition coil for repair. | 15th Dec 1927 | Box 69 \ 1 scan0069 | |
| Technical discussion on the design principles and advantages of an ignition coil with a nearly closed magnetic circuit. | 19th Dec 1927 | Box 69 \ 1 scan0070 | |
| Technical description of coil construction and insulation. | 7th Jan 1928 | Box 69 \ 1 scan0071 | |
| Summary of the advantages of American Central H.T. coils, detailing construction, performance, and issues with corrosion. | 7th Jan 1928 | Box 69 \ 1 scan0072 | |
| Proposal to test a new English-made, paraffin wax-impregnated paper for use in ignition coils and condensers. | 1st Jan 1928 | Box 69 \ 1 scan0073 | |
| Investigation report into the failure of two coils, numbers 4405 and T145X, from the repair department. | 4th Feb 1928 | Box 69 \ 1 scan0074 | |
| Investigation into overheating and charring failures of finer primary coils. | 10th Feb 1928 | Box 69 \ 1 scan0075 | |
| Issues of overheating and wet varnish in ignition coils and proposing solutions involving ballast resistances. | 10th Feb 1928 | Box 69 \ 1 scan0076 | |
| Test procedure for the comparison of experimental coils. | 15th Feb 1928 | Box 69 \ 1 scan0077 | |
| Continued list of testing procedures for an H.T. supply coil. | 9th May 1928 | Box 69 \ 1 scan0078 | |
| Testing and potential adoption of a new British-sourced insulating paper for ignition coils and condensers. | 9th May 1928 | Box 69 \ 1 scan0079 | |
| Temperature leakage tests conducted on three different types of insulating papers. | 8th May 1928 | Box 69 \ 1 scan0080 | |
| Assessment of a new, crisper material for use in coils and condensers, comparing it to the standard flexible material. | 12th May 1928 | Box 69 \ 1 scan0081 | |
| Specifications for a standard finer primary coil wound in the production department. | 12th May 1928 | Box 69 \ 1 scan0082 | |
| Use of ballast resistance with coarser primary winding ignition coils. | 16th May 1928 | Box 69 \ 1 scan0083 | |
| Primary winding and ballast resistance for ignition coils. | 16th May 1928 | Box 69 \ 1 scan0084 | |
| To Mr. Brock regarding the addition of a secondary winding of 18000 turns to a standard coil. | 8th May 1928 | Box 69 \ 1 scan0085 | |
| Ignition coil failures, referencing specific reports and suggesting design changes and further experiments. | 8th May 1928 | Box 69 \ 1 scan0086 | |
| The failure of an old ignition coil, tracing the fault to varnish on the secondary winding. | 13th May 1928 | Box 69 \ 1 scan0087 | |
| Technical note detailing H.T. tracking faults within ignition coil cases due to moisture. | 18th May 1928 | Box 69 \ 1 scan0088 | |
| Diagram illustrating the path of discharge along a surface within a component. | 7th Jan 1928 | Box 69 \ 1 scan0089 | |
| Summary of the advantages of American Central H.T. coils. | 7th Jan 1928 | Box 69 \ 1 scan0090 | |
| Comparison test procedure for experimental coils. | 18th May 1928 | Box 69 \ 1 scan0091 | |
| List of test procedures for an ignition coil. | 21th May 1928 | Box 69 \ 1 scan0092 | |
| Specifications and testing requirements for two new ignition coil designs. | 21th May 1928 | Box 69 \ 1 scan0093 | |
| Instruction sheet for packing two special coils (X & Y) for testing purposes. | 6th Jun 1928 | Box 69 \ 1 scan0094 | |
| Proposal to test an ignition coil with a reverse winding construction, listing required blueprints and materials. | 7th Jun 1928 | Box 69 \ 1 scan0095 | |
| Note specifying that parts called for on the L.O.P. are standard parts. | 7th Jun 1928 | Box 69 \ 1 scan0096 | |
| Comparative tests on waxed and varnished papers for use in coils and condensers. | 7th Jun 1928 | Box 69 \ 1 scan0097 | |
| Tests on various insulating papers to compare their properties under different conditions. | 31th May 1928 | Box 69 \ 1 scan0098 | |
| The conductance and dielectric strength tests of various insulating papers under different heating conditions. | 31th May 1928 | Box 69 \ 1 scan0099 | |
| Comparison of varnished and waxed papers for use in ignition coils and condensers, detailing their properties and suitability. | 8th Jun 1928 | Box 69 \ 1 scan0100 | |
| Confirming the satisfactory use of 22 gauge coarser primary coils with double ballast resistances. | 8th Jun 1928 | Box 69 \ 1 scan0101 | |
| To Mr. Brock with instructions to wind a coil with a 22 Gauge primary and 18000 turn secondary. | 8th Jun 1928 | Box 69 \ 1 scan0102 | |
| Requesting the replacement of a non-standard coil on chassis 15-EX. | 8th Jun 1928 | Box 69 \ 1 scan0103 | |
| Test report for standard ignition coils, detailing performance metrics against a specification. | 12th Jun 1928 | Box 69 \ 1 scan0104 | |
| Amended standard production test for a 22 SWG primary coil with double ballast resistance. | 9th Jun 1928 | Box 69 \ 1 scan0105 | |
| Production test procedure for an ignition coil. | 9th Jun 1928 | Box 69 \ 1 scan0106 | |
| Test procedures for an ignition distributor and coil, detailing current, voltage, and spark gap specifications. | 11th Jun 1928 | Box 69 \ 1 scan0107 | |
| Replacement of an ignition coil for chassis number 29-CL. | 11th Jun 1928 | Box 69 \ 1 scan0108 | |
| To Mr. Brock about using up existing standard coil cases for future tests to reduce costs. | 2nd Jun 1928 | Box 69 \ 1 scan0109 | |
| Cancelling a previous instruction regarding the build-up of an ignition coil. | 22th Jun 1928 | Box 69 \ 1 scan0110 | |
| Experimental ignition coil with the primary wound on the outside. | 22th Jun 1928 | Box 69 \ 1 scan0111 | |
| Request to Mr. Brock to wind a coil bobbin to specific standards for comparison with experimental coils. | 7th Feb 1928 | Box 69 \ 1 scan0112 | |
| Instructions detailing experimental bench tests on two ignition coils with different primary windings. | 4th Jul 1928 | Box 69 \ 1 scan0113 | |
| Instruction sheet detailing continued tests on a coil, including temperature and leakage effect analysis. | 8th Dec 1924 | Box 69 \ 1 scan0114 | |
| Test report on coil operating temperatures and performance with a metal sheath. | 8th Dec 1924 | Box 69 \ 1 scan0115 | |
| Test results for coils, comparing cooling, leakage, and insulation performance. | 8th Dec 1924 | Box 69 \ 1 scan0116 | |
| The comparative testing of coils, concluding with a recommendation on winding packing. | 5th Jul 1928 | Box 69 \ 1 scan0117 | |
| Report outlining reasons to believe that ignition coils were not being manufactured to the correct standard for secondary turns. | 5th Jul 1928 | Box 69 \ 1 scan0118 | |
| Temperature and leakage tests on experimental ignition coil cases made from new moulding powders. | 6th Jul 1928 | Box 69 \ 1 scan0119 | |
| Instruction sheet comparing leakage test results of different materials at various temperatures. | 8th Dec 1924 | Box 69 \ 1 scan0120 | |
| Instructions detailing issues with galvanometer readings during material testing. | 8th Dec 1924 | Box 69 \ 1 scan0121 | |
| Winding temperature tests of ignition coils under various conditions. | 6th Jul 1928 | Box 69 \ 1 scan0122 | |
| Temperature measurement tests on two different types of coils (X and Y) under various conditions. | 6th Jul 1928 | Box 69 \ 1 scan0123 | |
| Tests on electrical coils comparing heating at different voltages and performance under high temperatures. | 6th Jul 1928 | Box 69 \ 1 scan0124 | |
| Final conclusions of tests on coil leakage and performance with earthed shields. | 6th Jul 1928 | Box 69 \ 1 scan0125 | |
| Testing and construction of ignition coils using paraffin wax paper insulation. | 11th Jul 1928 | Box 69 \ 1 scan0126 | |
| Test procedure for comparing experimental coils. | 24th Jul 1928 | Box 69 \ 1 scan0127 | |
| Continuation of test procedures for an electrical coil, detailing various performance and endurance tests. | 24th Jul 1928 | Box 69 \ 1 scan0128 | |
| Procedure for the examination and mileage testing of a coil under chassis conditions. | 8th Aug 1928 | Box 69 \ 1 scan0129 | |
| Instructing the construction of ignition coils and condensers with Symons waxed paper, and requesting the supply of reusable parts. | 8th Aug 1928 | Box 69 \ 1 scan0130 | |
| The production and standardisation of ignition coils and condensers with waxed paper for Phantom & 20 HP chassis. | 16th Aug 1928 | Box 69 \ 1 scan0131 | |
| To Mr. Brock regarding the receipt of three ignition coils made of waxed paper. | 20th Aug 1928 | Box 69 \ 1 scan0132 | |
| Urging the supply of three ignition coils made with waxed paper. | 21th Aug 1928 | Box 69 \ 1 scan0133 | |
| Suggesting the best method for moisture-proofing ignition coil primaries by baking and varnishing. | 27th Aug 1928 | Box 69 \ 1 scan0134 | |
| Fitting and testing paraffin waxed paper ignition coils on experimental chassis. | 3rd Sep 1928 | Box 69 \ 1 scan0135 | |
| Test report on a paraffin waxed paper coil on an experimental chassis. | 17th Sep 1928 | Box 69 \ 1 scan0136 | |
| Instructions detailing engine misfiring issues and diagnostic steps taken, including ballast replacement. | 8th Dec 1924 | Box 69 \ 1 scan0137 | |
| Instructions detailing the investigation of an engine coil that mysteriously weakens at high temperatures. | 8th Dec 1924 | Box 69 \ 1 scan0138 | |
| Road test report for a paraffin waxed paper coil on a 9EX experimental car. | 13th Sep 1928 | Box 69 \ 1 scan0139 | |
| Instructions for troubleshooting a misfire, suggesting fitting a standard earthing connection to the distributor to resolve the issue. | 8th Dec 1924 | Box 69 \ 1 scan0140 | |
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