| Description | Date | Identifier | |
| Return of a loaned Emerson Radio Set after testing. | 21th Sep 1934 | Box 63 \ 3 scan0139 | |
| Letter from Carr's Car Distributors regarding interference from an Emerson Wireless Set vibrator unit. | 22th Sep 1934 | Box 63 \ 3 scan0140 | |
| Letter arranging a meeting at Hooper's Factory to discuss the installation of radio sets with Mr. Cowley of E. K. Cole. | 25th Sep 1934 | Box 63 \ 3 scan0141 | |
| Performance and best type of wireless aerial for cars with sunshine roofs. | 25th Sep 1934 | Box 63 \ 3 scan0142 | |
| Typed memo arranging a meeting concerning a car radio. | 26th Sep 1934 | Box 63 \ 3 scan0143 | |
| Following up on issuing instructions for Wireless Sets and suppressors. | 26th Sep 1934 | Box 63 \ 3 scan0144 | |
| Arranging a meeting at Hooper's Works to discuss a car radio. | 26th Sep 1934 | Box 63 \ 3 scan0145 | |
| The circulation of a Depot Sheet about wireless sets on cars. | 27th Sep 1934 | Box 63 \ 3 scan0146 | |
| The features of a new British Ekco car radio set for a 40/50 limousine. | 3rd Oct 1934 | Box 63 \ 3 scan0147 | |
| Installation of car radios, parts, noise suppression, and potential service partnerships. | 3rd Oct 1934 | Box 63 \ 3 scan0148 | |
| Letter from E.K. Cole Ltd. regarding a Show Exhibit, pre-production radio models, and weight considerations for Bentley cars. | 3rd Oct 1934 | Box 63 \ 3 scan0149 | |
| Placement of radio controls in cars, advocating for rear compartment operation to prevent driver distraction. | 4th Oct 1934 | Box 63 \ 3 scan0150 | |
| Visit to Messrs. Hoopers regarding the suitability of an English Ekco car radio compared to American sets. | 5th Oct 1934 | Box 63 \ 3 scan0151 | |
| Letter from Philco offering a new De Luxe Car Radio Receiver for loan and test purposes, detailing its specifications and price. | 6th Oct 1934 | Box 63 \ 3 scan0152 | |
| Query regarding customer complaints of fouled sparking plugs in vehicles fitted with wireless installations. | 1st Jan 1934 | Box 63 \ 3 scan0153 | |
| Inquiry from Rossleigh Limited regarding the fitting of a wireless set and aerial to chassis B-20-BN. | 9th Oct 1934 | Box 63 \ 3 scan0154 | |
| Letter to Philco Radio & Television Corporation regarding design concerns with a special ignition coil suppressor. | 9th Oct 1934 | Box 63 \ 3 scan0155 | |
| Spark plug fouling and ignition screening for cars with wireless installations. | 9th Oct 1934 | Box 63 \ 3 scan0156 | |
| The positioning of an aerial on Chassis B-20-Bn. | 10th Oct 1934 | Box 63 \ 3 scan0157 | |
| The selection and fitting of a 'SPECTRE' radio set, comparing Philco and Ekco models. | 11th Oct 1934 | Box 63 \ 3 scan0158 | |
| Issues and customer complaints regarding cars fitted with wireless installations. | 11th Oct 1934 | Box 63 \ 3 scan0159 | |
| Letter from Philco Radio and Television Corporation regarding a suppressor that did not meet approval and arranging an engineer visit. | 12th Oct 1934 | Box 63 \ 3 scan0160 | |
| Covering order to pay an invoice from Philco for Running Board Aerials. | 12th Oct 1934 | Box 63 \ 3 scan0161 | |
| To place an order with Messrs. Philco Radio & Television Corporation for one pair of running board aerials. | 13th Oct 1934 | Box 63 \ 3 scan0162 | |
| Letter from Erie Resistor Limited regarding a supply delay for special ignition suppressors. | 16th Oct 1934 | Box 63 \ 3 scan0163 | |
| Solutions to prevent car batteries from draining due to wireless sets being left on. | 16th Oct 1934 | Box 63 \ 3 scan0164 | |
| Risk of battery drain from wireless sets being left on and the suggestion for a warning lamp. | 18th Oct 1934 | Box 63 \ 3 scan0165 | |
| Letter to Philips Lamps Ltd. regarding arranging a test for a sample car radio set. | 18th Oct 1934 | Box 63 \ 3 scan0166 | |
| The installation of a radio set on car GUB.5, detailing challenges and future considerations. | 19th Oct 1934 | Box 63 \ 3 scan0167 | |
| Request to arrange a radio receiving license for car CUB.5 due to a newly installed wireless set. | 19th Oct 1934 | Box 63 \ 3 scan0168 | |
| Arranging to send a radio set with separate speaker for installation in the Second Spectre, chassis 31-EX. | 19th Oct 1934 | Box 63 \ 3 scan0169 | |
| Requesting the despatch of a complete Philco Radio Set to Mr. Evernden at Sales. | 19th Oct 1934 | Box 63 \ 3 scan0170 | |
| Letter from Philips Lamps Ltd to Rolls-Royce Ltd regarding a car-radio demonstration in Derby. | 19th Oct 1934 | Box 63 \ 3 scan0171 | |
| Requesting an opinion on the wiring of radio sets to show current discharge on the ammeter. | 25th Oct 1934 | Box 63 \ 3 scan0172 | |
| Correct power source for radio sets to avoid ignition interference. | 26th Oct 1934 | Box 63 \ 3 scan0173 | |
| Troubles with the fittings of Philco wireless sets. | 26th Oct 1934 | Box 63 \ 3 scan0174 | |
| Typed letter to Philips Lamps Ltd. arranging a demonstration in Derby. | 20th Oct 1934 | Box 63 \ 3 scan0175 | |
| The installation of a Philco wireless set and speaker in car model 31EX. | 29th Oct 1934 | Box 63 \ 3 scan0176 | |
| The installation of a wireless set in vehicle model 31-EX. | 30th Oct 1934 | Box 63 \ 3 scan0177 | |
| Letter to Philco Radio & Television Corporation regarding complaints about unsatisfactory coil and sparking plug suppressors. | 30th Oct 1934 | Box 63 \ 3 scan0178 | |
| Letter to Philips Lamps Ltd. requesting the loan of a car radio for inspection and testing, along with its technical data. | 1st Nov 1934 | Box 63 \ 3 scan0179 | |
| Letter from Philco Radio & Television Corporation regarding complaints about sparking plug suppressors. | 2nd Nov 1934 | Box 63 \ 3 scan0180 | |
| Letter to Philco Co. Ltd. regarding a faulty Model 11 radio set that was installed in a car. | 5th Nov 1934 | Box 63 \ 3 scan0181 | |
| Letter from Philips Lamps Limited regarding the provision of technical details and diagrams for a car-radio set. | 5th Nov 1934 | Box 63 \ 3 scan0182 | |
| Letter from Philco Radio and Television Corporation regarding a faulty Model 11 and arranging its return by passenger train. | 5th Nov 1934 | Box 63 \ 3 scan0183 | |
| Arranging the despatch of a faulty model 11 Radio set to be serviced by Messrs. Philco Ltd. | 6th Nov 1934 | Box 63 \ 3 scan0184 | |
| Letter from Philips Lamps Ltd regarding a delay in car-radio fitting information and diagrams. | 7th Nov 1934 | Box 63 \ 3 scan0185 | |
| Letter to Philco Radio & Television inquiring about their American company's aircraft radio sets. | 14th Nov 1934 | Box 63 \ 3 scan0186 | |
| Letter from Philco Radio & Television Corporation regarding the manufacture of aircraft radio apparatus. | 16th Nov 1934 | Box 63 \ 3 scan0187 | |
| Letter to R.C.A. Victor Company requesting a catalogue and particulars for aircraft radio sets, specifically one used on a Boeing in the England-Australian Air Race. | 17th Nov 1934 | Box 63 \ 3 scan0188 | |
| Letter from Marconi's Wireless Telegraph Company regarding aircraft radio sets in response to an inquiry. | 19th Nov 1924 | Box 63 \ 3 scan0189 | |
| Challenges of fitting a wireless aerial to a Spectre model car with a metal roof. | 19th Nov 1934 | Box 63 \ 3 scan0190 | |
| Letter from Standard Telephones and Cables Limited responding to an enquiry about Aircraft Radio Equipment and enclosing a catalogue. | 21th Nov 1934 | Box 63 \ 3 scan0191 | |
| Letter from Philco Radio and Television Corporation providing a price for a Model 11T receiver. | 21th Nov 1934 | Box 63 \ 3 scan0192 | |
| The installation of wireless aerials for the 2nd and 3rd Spectre models. | 22th Nov 1934 | Box 63 \ 3 scan0193 | |
| Request to send an order to Phillips Lamps Ltd. for a trial car radio set to be fitted to the third Spectre chassis. | 22th Nov 1934 | Box 63 \ 3 scan0194 | |
| Letter from Philco Radio regarding the pricing of a Model 801T car radio and other models. | 22th Nov 1934 | Box 63 \ 3 scan0195 | |
| Request to place an order with Messrs. Philco Ltd. for a car radio set, model 801T, for the second 'Spectre'. | 23th Nov 1934 | Box 63 \ 3 scan0196 | |
| Letter to The Plessey Co. Ltd. requesting details of their aircraft radio equipment. | 23th Nov 1934 | Box 63 \ 3 scan0197 | |
| Letter from the Royal Aircraft Establishment arranging a meeting about wireless interference problems. | 24th Nov 1934 | Box 63 \ 3 scan0198 | |
| Letter from The Plessey Company Limited sending a specification for Aircraft Radio Equipment type A.C.44. | 26th Nov 1934 | Box 63 \ 3 scan0199 | |
| Follow-up memo regarding cars fitted with wireless installations. | 27th Nov 1934 | Box 63 \ 3 scan0200 | |
| Letter from Philips Lamps Limited regarding the successful installation of a car radio in a 25 HP car. | 27th Nov 1934 | Box 63 \ 3 scan0201 | |
| Letter to Marconi's Wireless Telegraph Co. Ltd. enquiring about car radio sets. | 28th Nov 1934 | Box 63 \ 3 scan0202 | |
| Letter to Ferranti Ltd. requesting full particulars of car radio sets. | 28th Nov 1934 | Box 63 \ 3 scan0203 | |
| Letter to the Royal Aircraft Establishment arranging a visit with Mr. Capon. | 28th Nov 1934 | Box 63 \ 3 scan0204 | |
| Letter from Marconi's Wireless Telegraph Company discussing the suitability of radio receiving equipment for various purposes, including vehicle installations. | 29th Nov 1934 | Box 63 \ 3 scan0205 | |
| Page 2 of a letter from Marconi's Wireless Telegraph Co. regarding impracticable designs and alternative recommendations. | 30th Nov 1934 | Box 63 \ 3 scan0206 | |
| Letter from Ferranti Ltd regarding a delay in the manufacturing of Car Radio Receivers. | 30th Nov 1934 | Box 63 \ 3 scan0207 | |
| Modified spark plugs to prevent sooting and radio interference suppression. | 7th Dec 1934 | Box 63 \ 3 scan0208 | |
| Design improvements and issues with Philco wireless distributor head suppressors. | 10th Dec 1934 | Box 63 \ 3 scan0209 | |
| Letter regarding the installation of wireless radios in R-R and Bentley cars. | 11th Dec 1934 | Box 63 \ 3 scan0210 | |
| Letter from EKCO to Bentley Motors regarding the distribution and installation of car radios. | 8th Dec 1934 | Box 63 \ 3 scan0211 | |
| Letter from E.K.Cole Ltd. detailing the features, demonstration, and installation of the EKCO Car Radio receiver. | 8th Dec 1934 | Box 63 \ 3 scan0212 | |
| Specification and promotional leaflet for an EKCO Car Radio. | 8th Dec 1934 | Box 63 \ 3 scan0213 | |
| Advertisement leaflet for the EKCO all-British Car Radio, detailing its features, benefits, and price. | 10th Dec 1934 | Box 63 \ 3 scan0214 | |
| Follow-up letter to Philco Radio & Television Corporation regarding issues with suppressors for car radios. | 10th Dec 1934 | Box 63 \ 3 scan0215 | |
| Testing of a new car radio, aerial options, and the lack of suitable service stations. | 12th Dec 1934 | Box 63 \ 3 scan0216 | |
| Letter to E.K.Cole Ltd. regarding testing a car radio set and suppressing ignition interference. | 12th Dec 1934 | Box 63 \ 3 scan0217 | |
| Query regarding the optimal placement of a radio aerial in a car with a sunshine roof. | 18th Dec 1934 | Box 63 \ 3 scan0218 | |
| Car radio aerials, recommending non-metallic under-running board aerials over roof-mounted ones. | 19th Dec 1934 | Box 63 \ 3 scan0219 | |
| Authorization to pay an invoice from Delco-Remy & Hyatt Ltd. for connecting a radio car set. | 21th Dec 1934 | Box 63 \ 3 scan0220 | |
| Authorisation to pay an invoice received from Delco-Remy & Hyatt, Ltd. | 19th Dec 1934 | Box 63 \ 3 scan0221 | |
| Letter from Delco-Remy & Hyatt Ltd. concerning an invoice for fitting a car radio set to an experimental body. | 17th Dec 1934 | Box 63 \ 3 scan0222 | |
| Inquiry to Electrical & Musical Industries about aircraft and car radio equipment. | 28th Dec 1934 | Box 63 \ 3 scan0223 | |
| Query regarding a customer's insistence on fitting a 6-volt Philco wireless set into chassis B.47.CW. | 31th Dec 1934 | Box 63 \ 3 scan0224 | |
| Deprecating the installation of a 6-volt Philco wireless set into a 12-volt chassis system. | 1st Jan 1935 | Box 63 \ 3 scan0225 | |
| Discussion about fitting a 6-volt wireless set to a 12-volt system on chassis B.47.CW. | 2nd Jan 1935 | Box 63 \ 3 scan0226 | |
| The excessive power consumption of a 6-volt wireless set fitted to chassis B.47.CW. | 3rd Jan 1935 | Box 63 \ 3 scan0227 | |
| Letter from The Gramophone Company regarding enquiries for aircraft and car radio equipment. | 3rd Jan 1935 | Box 63 \ 3 scan0228 | |
| Letter from EKCO discussing the technical suitability of a Philips' Car Radio for installation. | 3rd Jan 1935 | Box 63 \ 3 scan0229 | |
| Letter discussing power requirements for electrical equipment and ignition system screening. | 3rd Jan 1935 | Box 63 \ 3 scan0230 | |
| Inquiry about the status of tests for special sparking plugs for use in cars fitted with wireless installations. | 3rd Jan 1935 | Box 63 \ 3 scan0231 | |
| Short memo confirming that sparking plugs are being trialled and a report will follow. | 4th Jan 1935 | Box 63 \ 3 scan0232 | |
| Letter from 'His Master's Voice' arranging a demonstration of their latest car radio set. | 4th Jan 1934 | Box 63 \ 3 scan0233 | |
| Letter from G. Beaton & Son Ltd. regarding their association with E. K. Cole Ltd. for the distribution of 'EKCO' Car Radios. | 4th Jan 1935 | Box 63 \ 3 scan0234 | |
| Continuation sheet of a letter from G. Beaton & Son, Ltd. offering a demonstration 'EKCO' Car Radio set. | 5th Jan 1934 | Box 63 \ 3 scan0235 | |
| Letter to 'His Masters Voice' arranging a demonstration of car radio sets. | 5th Jan 1934 | Box 63 \ 3 scan0236 | |
| Letter from The Gramophone Company Ltd acknowledging a letter and arranging a visit. | 8th Jan 1934 | Box 63 \ 3 scan0237 | |
| Letter from Marconi's Wireless Telegraph Company regarding the supply of aircraft radio equipment. | 9th Jan 1935 | Box 63 \ 3 scan0238 | |
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