| Description | Date | Identifier | |
| Assembly and connection of a condenser, with a reference to an attached print. | 31th Mar 1931 | Box 165 \ 5 img050 | |
| Proposal for an experimental circular R.R. Condenser design. | 31th Mar 1931 | Box 165 \ 5 img051 | |
| Expressing interest in cylindrical condensers for ignition, requesting to see an experimental model. | 23th Apr 1931 | Box 165 \ 5 img052 | |
| Request for Halo-wax impregnating material for experiments on Peregrine battery ignition condensers. | 16th Aug 1932 | Box 165 \ 5 img053 | |
| Request for the production of two further Peregrine ignition condensers for testing purposes. | 18th Aug 1932 | Box 165 \ 5 img054 | |
| Laboratory tests for a new type of circular condenser for a battery ignition system. | 23th Aug 1932 | Box 165 \ 5 img055 | |
| Technical memorandum comparing a new condenser's performance against the standard one for battery ignition systems. | 23th Aug 1932 | Box 165 \ 5 img056 | |
| Graph plotting insulation resistance and capacity against temperature for a condenser. | 22th Aug 1932 | Box 165 \ 5 img057 | |
| Graph comparing the variation of condenser capacity and insulation resistance with temperature for standard and new circular condensers. | 22th Aug 1932 | Box 165 \ 5 img058 | |
| New type of circular condenser for the R.R. battery ignition system. | 31th Aug 1932 | Box 165 \ 5 img059 | |
| Request to instruct Mr. Brock to produce three Peregrine condensers impregnated with Halowax. | 31th Aug 1932 | Box 165 \ 5 img060 | |
| New connection and cable eye parts for the Peregrine II and Japan III ignition condenser. | 16th Nov 1932 | Box 165 \ 5 img061 | |
| Letter from Joseph Lucas Limited to H.E. West regarding the construction of a new condenser and a forthcoming quotation. | 6th Feb 1933 | Box 165 \ 5 img062 | |
| Letter to Joseph Lucas Limited requesting four different capacity condensers for testing. | 7th Feb 1933 | Box 165 \ 5 img063 | |
| Letter to Joseph Lucas Ltd. regarding a potential short circuit issue with a sectioned condenser's insulation. | 10th Feb 1933 | Box 165 \ 5 img064 | |
| Letter from Joseph Lucas Limited regarding an experimental condenser sample and arrangements to prevent short circuits. | 13th Feb 1933 | Box 165 \ 5 img065 | |
| Letter from Joseph Lucas Limited regarding the dispatch of condensers with modifications. | 14th Feb 1933 | Box 165 \ 5 img066 | |
| Letter from L. A. Gamblen regarding the supply of ignition condensers and a related technical paper on ionization. | 1st Apr 1933 | Box 165 \ 5 img067 | |
| Letter to The Telegraph Condenser Co. enclosing a blueprint and requesting a quotation for condensers. | 3rd Apr 1933 | Box 165 \ 5 img068 | |
| Internal memorandum discussing the reliability and construction of battery ignition condensers to avoid ionization. | 4th Apr 1933 | Box 165 \ 5 img069 | |
| Letter from L. A. Gamblen requesting full electrical data for sample condensers being made by the Telegraph Condenser Co. Ltd. | 5th Apr 1933 | Box 165 \ 5 img070 | |
| Letter from The Telegraph Condenser Company requesting specifications for ignition condensers. | 5th Apr 1933 | Box 165 \ 5 img071 | |
| Letter from The Telegraph Condenser Co. Ltd. outlining their expertise and reasons for Rolls Royce to use their condensers. | 5th Apr 1933 | Box 165 \ 5 img072 | |
| Letter from The Telegraph Condenser Co. Ltd. discussing their specialisation in condensers suitable for tropical and ignition conditions. | 5th Apr 1933 | Box 165 \ 5 img073 | |
| Cover letter to Mr. L.A. Gamblen enclosing a copy of correspondence sent to The Telegraph Condenser Co. | 6th Apr 1933 | Box 165 \ 5 img074 | |
| Letter to The Telegraph Condenser Co. arranging a works visit to discuss points raised in their previous correspondence. | 6th Apr 1933 | Box 165 \ 5 img075 | |
| Letter to Mr. L.A. Gamblen returning an I.E.E. paper on the ionization of condensers. | 7th Apr 1933 | Box 165 \ 5 img076 | |
| From The Telegraph Condenser Company, Limited confirming a meeting with Mr West. | 8th Apr 1933 | Box 165 \ 5 img077 | |
| Letter to The Telegraph Condenser Co. Ltd. postponing a visit and rescheduling a meeting. | 10th Apr 1933 | Box 165 \ 5 img078 | |
| Letter from The Telegraph Condenser Company Limited confirming a meeting arrangement. | 11th Apr 1933 | Box 165 \ 5 img079 | |
| Letter to The Telegraph Condenser Co. Ltd. confirming a visit and discussing specifications for ignition condensers. | 13th Apr 1933 | Box 165 \ 5 img080 | |
| Test results for waxed paper samples and suggesting further experiments with plain paper for condensers. | 13th Apr 1933 | Box 165 \ 5 img081 | |
| Letter to The Telegraph Condenser Co. Ltd. chasing progress on sample R.R. ignition condensers for experimental testing. | 5th May 1933 | Box 165 \ 5 img082 | |
| Letter from The Telegraph Condenser Company Limited regarding the despatch of Ignition Condenser samples. | 9th May 1933 | Box 165 \ 5 img083 | |
| Issue with hygroscopic tape in condensers for 20/25, Bensport, and 40/50 chassis. | 10th May 1933 | Box 165 \ 5 img084 | |
| Revised production specification for the condenser for 20/25 and 40/50 battery ignition systems. | 11th May 1933 | Box 165 \ 5 img085 | |
| Production test procedure for a paper dielectric condenser used in battery ignition systems. | 11th May 1933 | Box 165 \ 5 img086 | |
| Specification outlining the testing procedure for a condenser. | 12th May 1933 | Box 165 \ 5 img087 | |
| Letter from The Telegraph Condenser Company regarding the dispatch of three condenser samples for testing. | 12th May 1933 | Box 165 \ 5 img088 | |
| Request to test a sample of special impregnated wax from the Telegraph Condenser Co. Ltd. for comparative tests on condensers and coils. | 15th May 1933 | Box 165 \ 5 img089 | |
| Tests of 20/25 & 40/50 battery ignition condensers, comparing paraffin waxed paper with plain paper impregnated with wax after winding. | 15th May 1933 | Box 165 \ 5 img090 | |
| Manufacturing process for condensers, specifically the use of wax for impregnation and the benefits of wax paper over plain paper. | 17th May 1933 | Box 165 \ 5 img091 | |
| Letter from The Telegraph Condenser Company Limited discussing graphs for ignition condensers and requesting test method details. | 18th May 1933 | Box 165 \ 5 img092 | |
| Graph plotting the capacity against temperature for various tin foil ignition condensers. | 18th May 1933 | Box 165 \ 5 img093 | |
| Graph showing the capacity of ignition condensers versus temperature at different frequencies. | 18th May 1933 | Box 165 \ 5 img094 | |
| Rejection of condenser paper due to pigmentation and its effect on ignition coil performance. | 18th May 1933 | Box 165 \ 5 img095 | |
| Supply, testing, and production use of condenser paper from various suppliers. | 19th May 1933 | Box 165 \ 5 img096 | |
| Comparison of leakage and insulation resistance tests between TCC Wax and RR Wax. | 25th May 1933 | Box 165 \ 5 img097 | |
| Letter to The Telegraph Condenser Co. Ltd. regarding the testing of a special impregnating wax sample. | 27th May 1933 | Box 165 \ 5 img098 | |
| Letter from The Telegraph Condenser Company regarding coil impregnating wax and ignition condensers. | 30th May 1933 | Box 165 \ 5 img099 | |
| Comparative test report on two different types of ignition coil impregnating wax. | 31th May 1933 | Box 165 \ 5 img100 | |
| Remarkable insulation properties of a new T.C.C. impregnating wax for ignition coils. | 3rd Jun 1933 | Box 165 \ 5 img101 | |
| The supply of ignition coil impregnating wax for testing. | 12th Jun 1933 | Box 165 \ 5 img102 | |
| Requesting the composition of ignition coil impregnating wax for examination. | 12th Jun 1933 | Box 165 \ 5 img103 | |
| Letter to The Telegraph Condenser Co.Ltd. regarding satisfactory tests on ignition condensers and a future bulk order. | 24th Jun 1933 | Box 165 \ 5 img104 | |
| Letter from The Telegraph Condenser Co. Ltd. regarding the satisfactory testing of their condensers. | 26th Jun 1933 | Box 165 \ 5 img105 | |
| Instructions for comparing a coil insulated with plain paper to the same coil filled with brown wax. | 13th Jul 1933 | Box 165 \ 5 img106 | |
| Test report detailing ignition coil secondary voltages under various conditions. | 17th Jul 1933 | Box 165 \ 5 img107 | |
| Test report on ignition coil secondary voltages under different temperature and battery conditions. | 11th Jul 1933 | Box 165 \ 5 img108 | |
| Test results for a Lucas condenser, measuring capacity and resistance at various temperatures during heating and cooling cycles. | 18th Jul 1933 | Box 165 \ 5 img109 | |
| Tests of six condensers comparing oil silk and tape insulation, noting high leakages. | 28th Jul 1933 | Box 165 \ 5 img110 | |
| Test results for a Delco-Remy condenser, showing capacity and resistance at various temperatures during heating and cooling cycles. | 3rd Jun 1933 | Box 165 \ 5 img111 | |
| Summary of research into the causes of excessive leakage in battery ignition condensers. | 3rd Aug 1933 | Box 165 \ 5 img112 | |
| Recommendation to adopt a new circular T.C.C. condenser for 20/25 and 40/50 HP chassis. | 1st Aug 1933 | Box 165 \ 5 img113 | |
| Recommending to cease manufacturing in-house ignition condensers and adopt the circular T.C.C. type. | 3rd Aug 1933 | Box 165 \ 5 img114 | |
| Improvement of standard squashed condensers and testing new circular type condensers. | 6th Sep 1933 | Box 165 \ 5 img115 | |
| Unsuitability of the standard squashed condenser and the proposal to switch to a double contact/breaker ignition unit. | 12th Sep 1933 | Box 165 \ 5 img116 | |
| Comparison test between an R.R. condenser and a T.C.C. condenser at 800 R.P.M. | 14th Sep 1933 | Box 165 \ 5 img117 | |
| Performance issues with battery ignition condensers and testing of alternatives. | 15th Sep 1933 | Box 165 \ 5 img118 | |
| Letter to The Telegraph Condenser Co. Ltd. requesting a further 6 condensers for testing. | 15th Sep 1933 | Box 165 \ 5 img119 | |
| Order for T.C.C. battery ignition condensers. | 15th Sep 1933 | Box 165 \ 5 img120 | |
| Internal request to order three 4 microfarad T.C.C. Mansbridge type condensers. | 6th Oct 1933 | Box 165 \ 5 img121 | |
| The testing of new circular condensers for car ignition on the Peregrine Chassis. | 5th Jan 1934 | Box 165 \ 5 img122 | |
| Request to gather data on circular condensers from the Telegraph Condenser Co. by fitting them to all experimental cars. | 5th Jan 1934 | Box 165 \ 5 img123 | |
| Letter discussing condensers for battery ignition, including tests, impregnating wax, and production orders. | 16th Jan 1934 | Box 165 \ 5 img124 | |
| Specifications for a T.C.C. Condenser D.74117. | 17th Jan 1934 | Box 165 \ 5 img125 | |
| Letter regarding the performance and specifications of condensers, comparing them to German practice. | 17th Jan 1934 | Box 165 \ 5 img126 | |
| Internal order request for six condensers from the Telegraph Condenser Co. | 18th Jan 1934 | Box 165 \ 5 img127 | |
| Proposal to use a new circular ignition condenser from the Telegraph Condenser Co. to save on production costs. | 20th Feb 1934 | Box 165 \ 5 img128 | |
| Internal request to order three condensers from the Telegraph Condenser Co. Ltd. | 4th Apr 1934 | Box 165 \ 5 img129 | |
| Cover letter for the production test specification for new circular type condensers made by the Telegraph Condenser Co. Ltd. | 30th Jul 1934 | Box 165 \ 5 img130 | |
| Production test specification for a battery ignition condenser made by Telegraph Condenser Co. Ltd. | 30th Jul 1934 | Box 165 \ 5 img131 | |
| Letter from a supplier regarding a delay and a potential slackness issue with ignition condensers for order 66221. | 31th Jul 1934 | Box 165 \ 5 img132 | |
| Inquiry to Telegraph Condenser Co. Ltd. about the physical qualities and potential deleterious effects of brown wax for ignition coil windings. | 9th Oct 1934 | Box 165 \ 5 img133 | |
| Letter from The Telegraph Condenser Company regarding the properties and suitability of a supplied brown wax for use in condensers. | 18th Oct 1934 | Box 165 \ 5 img134 | |
| Letter requesting drawings and specifications for electrolytic and paper condensers. | 17th Apr 1935 | Box 165 \ 5 img135 | |
| Letter to a customer regarding an ignition failure on a Bentley and the sourcing of new condensers. | 24th Apr 1935 | Box 165 \ 5 img136 | |
| Letter to E.K.Cole Ltd. regarding the standardization of a suppression condenser for car radio sets. | 24th Apr 1935 | Box 165 \ 5 img137 | |
| Letter responding to a query about the installation of extra filter units and condensers in vehicle body wiring. | 29th Apr 1935 | Box 165 \ 5 img138 | |
| Two failures of a battery ignition condenser due to a fractured flexible connection. | 29th Apr 1935 | Box 165 \ 5 img139 | |
| Letter to The Telegraph Condenser Co. Ltd. to arrange a meeting regarding a radio condenser question. | 10th May 1935 | Box 165 \ 5 img140 | |
| Request to fit an ignition coil impregnated with I.C.I 'Seekay' wax to engine 1.B.IV. | 28th May 1935 | Box 165 \ 5 img141 | |
| Letter from Bernard Hopps of Lodge Plugs regarding a faulty condenser on his 3.5 litre Bentley. | 3rd Jun 1935 | Box 165 \ 5 img142 | |
| Letter to Lodge Plugs Ltd. about a condenser failure due to a short flexible connection. | 4th Jun 1935 | Box 165 \ 5 img143 | |
| Letter from Lodge Plugs Ltd regarding a condenser failure on a Bentley and a request for a spare part. | 7th Jun 1935 | Box 165 \ 5 img144 | |
| Letter from The Telegraph Condenser Company regarding breakdown voltage curves for ignition and car radio condensers. | 20th Jun 1935 | Box 165 \ 5 img145 | |
| Graph showing average breakdown voltage versus temperature curves for a T.C.C. car radio condenser. | 19th Jun 1935 | Box 165 \ 5 img146 | |
| Graph of average breakdown voltage versus temperature curves for ignition condensers. | 19th Jun 1935 | Box 165 \ 5 img147 | |
| Specification request for a small high-tension laboratory testing condenser for use in aero ignition experiments. | 7th Sep 1935 | Box 165 \ 5 img148 | |
| Order for a laboratory testing condenser for ignition experiments. | 17th Sep 1935 | Box 165 \ 5 img149 | |
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