| Description | Date | Identifier | |
| Investigation into engine knock characteristics, analysing flame movement and pressure variations using oscillograms. | 27th Apr 1935 | Box 63 \ 2 scan0076 | |
| Specification sheet for a Cadillac Wireless Set (Car Radio) with a 6-volt supply. | 9th Jul 1935 | Box 63 \ 2 scan0077 | |
| Car radio bulletin detailing fixes and parts for various models. | 10th Jul 1935 | Box 63 \ 2 scan0078 | |
| Fitting of car radios, the quality of British sets, and aerial design challenges. | 10th Jul 1935 | Box 63 \ 2 scan0079 | |
| To order an under-car radio aerial from Philips Lamps. | 11th Jul 1935 | Box 63 \ 2 scan0080 | |
| Covering note enclosing a letter from Messrs. E.K. Cole regarding a car radio. | 11th Jul 1935 | Box 63 \ 2 scan0081 | |
| Letter from E.K. Cole Ltd. clarifying responsibility for an 'over enthusiastic' newspaper article in 'The Wallasey News' regarding their car radio. | 15th Jul 1935 | Box 63 \ 2 scan0082 | |
| Clarifying the status of an Ekco car radio fitting and the availability of other radio sets. | 15th Jul 1935 | Box 63 \ 2 scan0083 | |
| Fitting of an Ekco car radio and comparing it to a Phillips set. | 16th Jul 1935 | Box 63 \ 2 scan0084 | |
| Unsuitability of a sample Ekco car radio for installation. | 18th Jul 1935 | Box 63 \ 2 scan0085 | |
| Letter to E.K.Cole Ltd. regarding the return of an unsuitable Ekco Car Radio set. | 19th Jul 1935 | Box 63 \ 2 scan0086 | |
| Letter from E.K. Cole Ltd (EKCO) regarding the unsuitability of a car radio receiver and proposing solutions. | 22th Jul 1935 | Box 63 \ 2 scan0087 | |
| Page 2 of a letter from E.K.Cole Ltd. to Rolls-Royce Ltd., Derby, requesting to send an order. | 29th Jul 1935 | Box 63 \ 2 scan0088 | |
| Requesting a list of 'don'ts' for customers looking to have a wireless set fitted to their cars. | 29th Jul 1935 | Box 63 \ 2 scan0089 | |
| Letter to E.K. Cole Ltd. regarding a delayed response and the loan of an instrument board for a show. | 6th Aug 1935 | Box 63 \ 2 scan0090 | |
| Cover letter for general notes and instructions on installing radio receiving sets on chassis. | 6th Aug 1935 | Box 63 \ 2 scan0091 | |
| General notes and instructions regarding the installation of radio receiving sets on chassis. | 6th Aug 1935 | Box 63 \ 2 scan0092 | |
| Instructions for fitting condensers and suppressors to eliminate electrical interference on various chassis models. | 7th Aug 1935 | Box 63 \ 2 scan0093 | |
| Requesting the fitting of a new radio aerial to the 'SPECTRE 2' chassis as per drawing EL149. | 7th Aug 1935 | Box 63 \ 2 scan0094 | |
| The installation of car radio sets by General Electric Co. and Marconiphone Co. | 9th Aug 1935 | Box 63 \ 2 scan0095 | |
| Letter from E.K. Cole Ltd (EKCO) regarding an instrument board and switch sent for an exhibition. | 9th Aug 1935 | Box 63 \ 2 scan0096 | |
| Letter to Marconi-Phone Co. Ltd. regarding the installation of radio sets. | 10th Aug 1935 | Box 63 \ 2 scan0097 | |
| Letter to General Electric Co. Ltd. regarding the installation of their radio sets in Rolls-Royce and Bentley chassis. | 10th Aug 1935 | Box 63 \ 2 scan0098 | |
| Letter from The Marconiphone Company regarding car radio installations. | 13th Aug 1935 | Box 63 \ 2 scan0099 | |
| Letter discussing a new adjustable car radio aerial designed for mounting under the running boards. | 14th Aug 1935 | Box 63 \ 2 scan0100 | |
| Requesting the despatch of a car radio aerial, made to drawing EL.149, to Lillie Hall for testing purposes. | 14th Aug 1935 | Box 63 \ 2 scan0101 | |
| Blueprints for a new car radio aerial, drawing EL149. | 20th Aug 1935 | Box 63 \ 2 scan0102 | |
| Request for particulars and data on car radio sets sent to The General Electric Co. Ltd. | 29th Aug 1935 | Box 63 \ 2 scan0103 | |
| Letter to The Marconiphone Co. Ltd. requesting technical data on car radio sets. | 29th Aug 1935 | Box 63 \ 2 scan0104 | |
| Letter from The General Electric Co., Ltd. regarding a G.E.C. Car Radio enquiry. | 31th Aug 1935 | Box 63 \ 2 scan0105 | |
| Letter from The Marconiphone Company Limited regarding a special publication on a Car Radio Receiver. | 2nd Sep 1935 | Box 63 \ 2 scan0106 | |
| Confirming the receipt of 50 copies of prints with instructions about wireless. | 12th Sep 1935 | Box 63 \ 2 scan0107 | |
| Letter from E.K. Cole Ltd (EKCO) regarding a price reduction and promotion of their car radios. | 12th Sep 1935 | Box 63 \ 2 scan0108 | |
| Page 2 of a letter from E.K. Cole Ltd.'s Car Radio Engineer concerning the standardization of aerials. | 12th Sep 1935 | Box 63 \ 2 scan0109 | |
| Short memo asking about the trial of a radio aerial sent with Mr. Archer. | 12th Sep 1935 | Box 63 \ 2 scan0110 | |
| Solution for wireless interference on a Bentley B-25-EJ chassis. | 16th Sep 1935 | Box 63 \ 2 scan0111 | |
| Not providing brackets for the wireless set on the dashboard. | 18th Sep 1935 | Box 63 \ 2 scan0112 | |
| Letter from Marconi's Wireless Telegraph Co. acknowledging receipt of information regarding aircraft engine-driven generator drives. | 20th Sep 1935 | Box 63 \ 2 scan0113 | |
| Letter from Philips Lamps Limited's Radio Department responding to a service request and arranging a meeting. | 21th Sep 1935 | Box 63 \ 2 scan0114 | |
| Letter to Philips Lamps Ltd. regarding staff availability to discuss car radio installation. | 23th Sep 1935 | Box 63 \ 2 scan0115 | |
| Letter from The Marconiphone Company regarding the availability of car radio receivers. | 24th Sep 1935 | Box 63 \ 2 scan0116 | |
| Correspondence regarding radio interference on a Bentley chassis and the recommendation of a U-shaped copper tube aerial. | 25th Sep 1935 | Box 63 \ 2 scan0117 | |
| Asking whether to renew the expiring wireless licence for car R.C.1822 (GUB-5). | 28th Sep 1935 | Box 63 \ 2 scan0118 | |
| Requesting the renewal of a wireless licence for a car. | 1st Oct 1935 | Box 63 \ 2 scan0119 | |
| Follow-up memo chasing a reply to a previous communication. | 2nd Oct 1935 | Box 63 \ 2 scan0120 | |
| Radio aerial test and the decreasing number of radio sets being fitted to cars. | 4th Oct 1935 | Box 63 \ 2 scan0121 | |
| Letter from GEC concerning the installation of a car radio receiver in a Bentley. | 7th Oct 1935 | Box 63 \ 2 scan0122 | |
| Request to create an experimental pedal to move the chassis lubricating pump to accommodate a G.E.C. radio set. | 8th Oct 1935 | Box 63 \ 2 scan0123 | |
| Letter to General Electric Co. Ltd. concerning the delayed installation of a G.E.C. car radio receiver in a Bentley chassis and requesting longer control cables. | 8th Oct 1935 | Box 63 \ 2 scan0124 | |
| Invoice from Philips Lamps Ltd. for an engineer's visit, with handwritten notes about the car's radio guarantee and purchase history. | 8th Oct 1935 | Box 63 \ 2 scan0125 | |
| Disputing a repair charge from Philips Lamps Ltd for a set installed six months prior. | 12th Oct 1935 | Box 63 \ 2 scan0126 | |
| Letter from The General Electric Co. Ltd. regarding the supply of longer replacement cables for a G.E.C. Bentley car radio. | 12th Oct 1935 | Box 63 \ 2 scan0127 | |
| Letter from the Philco Car Radio Division concerning electrical interference solutions and new radio sets. | 14th Oct 1935 | Box 63 \ 2 scan0128 | |
| Letter requesting details on a condenser fitted to a dynamo voltage regulator that successfully completed 10,000 miles. | 15th Oct 1935 | Box 63 \ 2 scan0129 | |
| Letter to Philco Radio & Television Corp discussing regulator interference and accepting the loan of a new set for testing. | 15th Oct 1935 | Box 63 \ 2 scan0130 | |
| Letter acknowledging a request and enclosing a condenser for a wireless system in a Bentley car. | 17th Oct 1935 | Box 63 \ 2 scan0131 | |
| Order to be placed with the General Electric Co. for a car radio set. | 21th Oct 1935 | Box 63 \ 2 scan0132 | |
| The return of a faulty EKCO car radio set for repair and overhaul. | 21th Oct 1935 | Box 63 \ 2 scan0133 | |
| Promotional advertisement for a new Philco car radio and a specific model for coaches. | 21th Oct 1935 | Box 63 \ 2 scan0134 | |
| Advertisement for the Philco 803T faultless car radio. | 22th Oct 1935 | Box 63 \ 2 scan0135 | |
| Letter from Philco Radio & Television discussing a new car radio receiver, model 803T, and its suppression system. | 22th Oct 1935 | Box 63 \ 2 scan0136 | |
| Wireless radios and running board aerials on cars. | 29th Oct 1935 | Box 63 \ 2 scan0137 | |
| Letter from N.R.S. LTD offering car radio installation and repair services. | 11th Oct 1935 | Box 63 \ 2 scan0138 | |
| Advertisement for 'Natrasco' patented auto-aerials and an 'Auto-Rez' voltage adjuster for car radios. | 5th Nov 1935 | Box 63 \ 2 scan0139 | |
| Instruction to amend the fitting of a G.E.C. radio set from chassis 6.B.IV to chassis 21.G.IV. | 5th Nov 1935 | Box 63 \ 2 scan0140 | |
| Request to install a Marconi car radio in a new experimental Phantom III body, with a handwritten reply. | 8th Nov 1935 | Box 63 \ 2 scan0141 | |
| Letter from The Marconiphone Company Limited regarding a Car Radio MODEL '336' left for testing and experimental work. | 11th Nov 1935 | Box 63 \ 2 scan0142 | |
| Concerning chassis B-155-EJ, attaching correspondence received from The Car Mart Ltd. | 12th Nov 1935 | Box 63 \ 2 scan0143 | |
| Letter from The Car Mart Ltd. to Bentley Motors regarding interference issues with a Philco car radio installation in a 3.5-litre Bentley. | 9th Nov 1935 | Box 63 \ 2 scan0144 | |
| Letter to The Car Mart Ltd. regarding the installation of a radio receiver on Chassis No. B-155-EJ. | 11th Nov 1935 | Box 63 \ 2 scan0145 | |
| Letter from The General Electric Co. Ltd. requesting a performance report on a car radio installed in a Rolls-Bentley. | 12th Nov 1935 | Box 63 \ 2 scan0146 | |
| Letter to The Car Mart Co. Ltd. regarding radio interference issues on chassis No. B-155-EJ. | 13th Nov 1935 | Box 63 \ 2 scan0147 | |
| Letter from Delco-Remy & Hyatt Ltd. regarding car radio application and voltage regulator issues. | 16th Nov 1935 | Box 63 \ 2 scan0148 | |
| Page 2 of a letter from Delco-Remy & Hyatt, Ltd. regarding car radio fitment issues in Bentley cars. | 18th Nov 1935 | Box 63 \ 2 scan0149 | |
| Letter from Marconiphone regarding the delivery of a car radio model for testing. | 18th Nov 1935 | Box 63 \ 2 scan0150 | |
| Letter to Delco Remy & Hyatt Ltd. regarding an interference problem on cars. | 19th Nov 1935 | Box 63 \ 2 scan0151 | |
| Visit from the Managing Director of Delco-Remy & Hyatt, Co. Ltd. to discuss ignition systems and radio interference. | 29th Nov 1935 | Box 63 \ 2 scan0152 | |
| Continued memorandum discussing interference caused by a voltage regulator in customer cars. | 29th Nov 1935 | Box 63 \ 2 scan0153 | |
| Letter from Philips Lamps Limited regarding modifications to a Car Radio Set, specifically the fusing arrangements. | 29th Nov 1935 | Box 63 \ 2 scan0154 | |
| Letter to Philips Lamps Ltd. requesting a sample fuse, fuse holder, and wiring diagram for inspection. | 30th Nov 1935 | Box 63 \ 2 scan0155 | |
| Letter from Philips Lamps Ltd regarding the sending of a complete battery cable and wiring diagram. | 2nd Dec 1935 | Box 63 \ 2 scan0156 | |
| Letter to the General Electric Co. Ltd. regarding difficulty fitting a car radio due to interference with the chassis lubrication pump. | 5th Dec 1935 | Box 63 \ 2 scan0157 | |
| Request for the manufacture of 4 support clamps for fitting a radio aerial under a car. | 6th Dec 1935 | Box 63 \ 2 scan0158 | |
| Letter to Philco Radio & Television Corporation regarding suppressing radio interference on R.R. and Bentley chassis. | 7th Dec 1935 | Box 63 \ 2 scan0159 | |
| The investigation and recommended solution for car radio interference caused by the dynamo voltage regulator. | 7th Dec 1935 | Box 63 \ 2 scan0160 | |
| Letter to The Marconiphone Co. Ltd. regarding radio interference suppression on R.R. and Bentley chassis. | 7th Dec 1935 | Box 63 \ 2 scan0161 | |
| Letter regarding the method for suppressing radio interference from the C.A.V dynamo voltage regulator on R.R. and Bentley chassis. | 7th Dec 1935 | Box 63 \ 2 scan0162 | |
| Letter to The General Electric Co. Ltd. about suppressing radio interference from a dynamo voltage regulator on R.R. and Bentley chassis. | 7th Dec 1935 | Box 63 \ 2 scan0163 | |
| Letter to Messrs. Delco-Remy & Hyatt, Ltd. regarding radio interference from a C.A.V. dynamo voltage regulator. | 7th Dec 1935 | Box 63 \ 2 scan0164 | |
| Letter to C.A.V - Bosch Ltd. detailing the method for suppressing radio interference from a dynamo voltage regulator. | 7th Dec 1935 | Box 63 \ 2 scan0165 | |
| Letter from a supplier concerning radio interference caused by a C.A.V. Dynamo Voltage Regulator. | 9th Dec 1935 | Box 63 \ 2 scan0166 | |
| Letter from Philco's Car Radio Division requesting samples of metal braided cables for installations. | 10th Dec 1935 | Box 63 \ 2 scan0167 | |
| Letter from E.K. Cole Ltd (EKCO) regarding methods for eliminating radio interference and a request for radio fitting instructions. | 10th Dec 1935 | Box 63 \ 2 scan0168 | |
| Correspondence from Philips Lamps regarding car radio components, power lines, and fusing arrangements. | 10th Dec 1935 | Box 63 \ 2 scan0169 | |
| Letter from E.M.I. Service regarding dynamo interference with radios on vehicle chassis. | 11th Dec 1935 | Box 63 \ 2 scan0170 | |
| Letter to The General Electric Co. Ltd. regarding difficulties fitting their car radio set. | 12th Dec 1935 | Box 63 \ 2 scan0171 | |
| Letter to Philips Lamps Ltd. regarding a delayed power line or connections diagram. | 12th Dec 1935 | Box 63 \ 2 scan0172 | |
| Letter to Messrs E.K. Cole Ltd. confirming that blue prints and instructions have been arranged. | 12th Dec 1935 | Box 63 \ 2 scan0173 | |
| Request to send blueprints and instructions for fitting a radio set to R.R. & Bentley chassis to a third party. | 12th Dec 1935 | Box 63 \ 2 scan0174 | |
| Cover letter to E. K. Cole Ltd. enclosing a leaflet with recommendations for installing car radios. | 13th Dec 1935 | Box 63 \ 2 scan0175 | |
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