| Description | Date | Identifier | |
| Letter from World Radio Limited recommending their American Bosch Car Radio for installation in Rolls-Royce vehicles. | 6th Nov 1936 | Box 63 \ 2 scan0276 | |
| Letter to Messrs World Radio Ltd. requesting to examine two radio sets and asking for a quotation. | 16th Nov 1936 | Box 63 \ 2 scan0277 | |
| Letter from World Radio Limited confirming the dispatch of car radios and accessories. | 17th Nov 1936 | Box 63 \ 2 scan0278 | |
| Specifications for an American-Bosch Wireless Set. | 2nd Nov 1936 | Box 63 \ 2 scan0279 | |
| Request to issue a covering order for an American Bosch car radio set fitted to an experimental car for trial. | 19th Dec 1936 | Box 63 \ 2 scan0280 | |
| Instructions for drilling front axle pivots to accommodate an earthing contact plug for wireless equipment. | 6th Nov 1936 | Box 63 \ 2 scan0281 | |
| Letter from Philco Car Radio Division regarding a new 'L' choke part to solve engine interference. | 9th Nov 1936 | Box 63 \ 2 scan0282 | |
| Arrangements for fitting earth contacts to front hubs. | 19th Nov 1936 | Box 63 \ 2 scan0283 | |
| The incorrect fitment of wireless earth contacts for front hubs on a Phantom II chassis. | 24th Nov 1936 | Box 63 \ 2 scan0284 | |
| Requesting a design scheme for wireless earth contacts for front hubs on a Phantom II chassis. | 28th Nov 1936 | Box 63 \ 2 scan0285 | |
| Request to produce a set of parts for wireless earth contacts for the front hubs on a Phantom II chassis. | 14th Dec 1936 | Box 63 \ 2 scan0286 | |
| Letter to Philco Radio & Television Corporation regarding a test report on a new type L choke for suppressing ignition noises. | 4th Jan 1937 | Box 63 \ 2 scan0287 | |
| Sales letter from Philco Radio to Rolls-Royce promoting their new British-made car radio, model K627. | 18th Jan 1937 | Box 63 \ 2 scan0288 | |
| Use of a car's running board as a radio aerial, referencing Buick and Philco specifications. | 25th Jan 1937 | Box 63 \ 2 scan0289 | |
| Radio aerial installation options for Bentley and Phantom III cars, with recommendations from Philco. | 30th Jan 1937 | Box 63 \ 2 scan0290 | |
| The return of a loaned Philco car radio set, type 901.T. | 9th Mar 1937 | Box 63 \ 2 scan0291 | |
| Cover note attaching correspondence received from Philco and the sender's reply. | 22th Apr 1937 | Box 63 \ 2 scan0292 | |
| Letter from Philco Radio and Television Corporation offering assistance with radio interference radiation from motor engines. | 21th Apr 1937 | Box 63 \ 2 scan0293 | |
| Page two of a letter to Major L. W. Cox concerning interference with short wave and television reception in cars. | 21th Apr 1937 | Box 63 \ 2 scan0294 | |
| Letter forwarding a query from Philco Radio and Television to another department for handling. | 22th Apr 1937 | Box 63 \ 2 scan0295 | |
| Letter to Messrs Philco Ltd. asking to confirm their method of screening H.T. parts. | 24th Apr 1937 | Box 63 \ 2 scan0296 | |
| Letter from Philco Radio discussing the screening method used for car radio installation. | 26th Apr 1937 | Box 63 \ 2 scan0297 | |
| Inquiry from a coachbuilder about fitting special hubs to wheels on Phantom III cars to eliminate radio interference. | 30th Apr 1937 | Box 63 \ 2 scan0299 | |
| Philco Car Radio Service Bulletin detailing the contents and part numbers for various model kits. | 7th Apr 1937 | Box 63 \ 2 scan0300 | |
| Newsletter for radio servicemen, with an article on an all-wave aerial and advertising materials. | 1st Apr 1937 | Box 63 \ 2 scan0301 | |
| Service news bulletin for radio engineers regarding aerials, information binders, and components. | 3rd May 1937 | Box 63 \ 2 scan0302 | |
| Letter to coachbuilder Hooper & Co. regarding the fitting of special earthing adaptors to chassis wheels. | 3rd May 1937 | Box 63 \ 2 scan0303 | |
| Request for the manufacture of one dozen contact earthing springs. | 6th May 1937 | Box 63 \ 2 scan0304 | |
| Requesting the urgent supply of contact springs for Phantom III front hubs. | 7th May 1937 | Box 63 \ 2 scan0305 | |
| The problematic fit of the earth contact plug in front hubs, proposing a modification and a future redesign. | 21th May 1937 | Box 63 \ 2 scan0306 | |
| Approval for an earth contact in the wheel hub to prevent radio interference in cars fitted with wireless sets. | 25th May 1937 | Box 63 \ 2 scan0307 | |
| Request to fit a standard Philco car radio to chassis 28.G.6 for experiments with outside aerials. | 19th May 1937 | Box 63 \ 2 scan0308 | |
| Instruction memo regarding the fitting of a new chromium-plated radio aerial to vehicle 32.EX. | 19th May 1937 | Box 63 \ 2 scan0309 | |
| Modification to the earth contact plug in the front hubs due to fitting issues. | 21th May 1937 | Box 63 \ 2 scan0310 | |
| Redesign of the earth contact plug for front hubs on various car models. | 1st Jun 1937 | Box 63 \ 2 scan0311 | |
| Letter from Erie Resistor Limited concerning their latest 3N and 4N fully insulated resistors. | 17th Jun 1937 | Box 63 \ 2 scan0312 | |
| Specification sheet for insulated resistors detailing their dimensions and electrical ratings. | 18th Jun 1937 | Box 63 \ 2 scan0313 | |
| Packing slip from Erie Resistor Limited for various sample resistors. | 18th Jun 1937 | Box 63 \ 2 scan0314 | |
| Letter from coachbuilders Hooper & Co regarding fittings to reduce radio static on a Phantom III chassis. | 29th Jun 1937 | Box 63 \ 2 scan0315 | |
| Modifications to the stub axles of Wraith III and Bentley III models for wireless anti-static earthing adaptors. | 8th Jul 1937 | Box 63 \ 2 scan0316 | |
| Letter to coachbuilder Messrs Hooper & Co. regarding the availability of brake static adaptors. | 30th Jun 1937 | Box 63 \ 2 scan0317 | |
| Follow-up memo regarding the settlement of the earthing adaptor for the elimination of brake static. | 24th Jun 1937 | Box 63 \ 2 scan0318 | |
| The availability of earthing adaptors to eliminate brake static when fitting radio sets. | 28th Jun 1937 | Box 63 \ 2 scan0319 | |
| The design, cost, and production of wireless anti-static earthing adaptors and a proposed change to Wraith stub axles. | 1st Jul 1937 | Box 63 \ 2 scan0320 | |
| Proposing a modification to the stub axles of Wraith III and Bentley III cars for wireless anti-static earthing. | 8th Jul 1937 | Box 63 \ 2 scan0321 | |
| Requesting the removal of a radio set and aerial from vehicle 32EX. | 31th Aug 1937 | Box 63 \ 2 scan0322 | |
| Requesting the status of radio sets on test in various experimental cars. | 24th Sep 1937 | Box 63 \ 2 scan0323 | |
| The renewal of a wireless licence for car R.C.1822 (Chassis No. GUB-5). | 30th Sep 1937 | Box 63 \ 2 scan0324 | |
| Non-renewal of a wireless licence for a sold vehicle. | 2nd Oct 1937 | Box 63 \ 2 scan0325 | |
| Wireless licences for chassis R.C.1822 (GUB-5) and 32-EX. | 4th Oct 1937 | Box 63 \ 2 scan0326 | |
| Implementing a radio earthing scheme for all Bentley cars. | 6th Oct 1937 | Box 63 \ 2 scan0327 | |
| Letter to World Radio Ltd. regarding a faulty American Bosch car radio set. | 13th Oct 1937 | Box 63 \ 2 scan0328 | |
| Letter from World Radio Limited concerning a faulty American Bosch Car Radio Set. | 15th Oct 1937 | Box 63 \ 2 scan0329 | |
| Letter to World Radio Ltd. regarding the return of a faulty radio set for repair. | 16th Oct 1937 | Box 63 \ 2 scan0330 | |
| Requesting the return of a faulty American Bosch car radio set for repair due to a rattling loudspeaker. | 16th Oct 1937 | Box 63 \ 2 scan0331 | |
| Arranging the dispatch of a faulty American Bosch car radio set for repair due to a rattling loudspeaker. | 18th Oct 1937 | Box 63 \ 2 scan0332 | |
| Instructions to refit an American Bosch radio set and aerial to vehicle 32.EX. | 1st Nov 1937 | Box 63 \ 2 scan0333 | |
| Letter from Stedall and Company Ltd offering Arvin car radio sets for testing and purchase. | 17th Nov 1937 | Box 63 \ 2 scan0334 | |
| Promotional leaflet for Arvin car radios and aerials, detailing the 'Phantom Filter' technology and other new features for 1937. | 1st Jan 1937 | Box 63 \ 2 scan0335 | |
| Promotional flyer for Arvin Tailor-Fit Car Radios and accessories. | 30th Nov 1937 | Box 63 \ 2 scan0336 | |
| Order for a Motorola car radio set from The World Radio Ltd. | 30th Nov 1937 | Box 63 \ 2 scan0337 | |
| Letter from Ferranti Ltd. regarding the manufacturing of suppressor type condensers for cars with radios. | 3rd Dec 1937 | Box 63 \ 2 scan0338 | |
| Request for particulars and current consumption data for car radio sets from the Philco Radio & Television Corporation. | 20th Apr 1934 | Box 63 \ 3 scan0001 | |
| Letter regarding interference issues with Philco installations on Bentley Chassis and proposals to eliminate it. | 28th May 1934 | Box 63 \ 3 scan0002 | |
| Continuation sheet of a letter from Delco-Remy & Hyatt, Ltd. regarding Philco Service. | 14th May 1934 | Box 63 \ 3 scan0003 | |
| Internal request to place an order for sparking plug and distributor suppressors. | 14th May 1934 | Box 63 \ 3 scan0004 | |
| Letter regarding interference on a Bentley Chassis and servicing of Philco sets. | 29th May 1934 | Box 63 \ 3 scan0005 | |
| Internal inquiry regarding ignition misfiring issues caused by fitting radio supressors to different car chassis. | 30th May 1934 | Box 63 \ 3 scan0006 | |
| Letter to Philco Radio & Television Corporation regarding faulty ignition performance due to their radio sets. | 30th May 1934 | Box 63 \ 3 scan0007 | |
| Order for sparking plug and distributor suppressors from Philco Co. | 30th May 1934 | Box 63 \ 3 scan0008 | |
| Ignition misfiring and oiled plug issues in 25 HP and Phantom II chassis in relation to wireless sets. | 31th May 1934 | Box 63 \ 3 scan0009 | |
| Follow-up letter to Philco Radio & Television Corporation regarding a visit from their representative. | 4th Jun 1934 | Box 63 \ 3 scan0010 | |
| Letter to Professor G.I. Finch requesting information on his experiments with battery ignition versus magneto ignition. | 7th Jun 1934 | Box 63 \ 3 scan0011 | |
| Letter from Imperial College discussing the capacity component discharged across plug points. | 8th Jun 1934 | Box 63 \ 3 scan0012 | |
| The self-capacity within a secondary ignition circuit, using a Morris Minor as an example. | 8th Jun 1934 | Box 63 \ 3 scan0013 | |
| The measurement of coil self-capacitance and lead coil-distributor properties. | 8th Jun 1934 | Box 63 \ 3 scan0014 | |
| The length and capacity of ignition leads. | 8th Jun 1934 | Box 63 \ 3 scan0015 | |
| Correspondence on Imperial College letterhead regarding a coil and distributor. | 8th Jun 1934 | Box 63 \ 3 scan0016 | |
| The self-capacitance measurements of different magnetos. | 8th Jun 1934 | Box 63 \ 3 scan0017 | |
| Imperial College letterhead discussing the capacity of a coil and distributor. | 8th Jun 1934 | Box 63 \ 3 scan0018 | |
| Comparison of coil and magneto ignition systems focusing on the capacity of the distributor lead. | 8th Jun 1934 | Box 63 \ 3 scan0019 | |
| On Imperial College of Science and Technology letterhead regarding distributor plug leads and electrical discharge. | 8th Jun 1934 | Box 63 \ 3 scan0020 | |
| The causes and reduction of spark plug point wear. | 8th Jun 1934 | Box 63 \ 3 scan0021 | |
| Pre-ignition experiments on Imperial College letterhead. | 8th Jun 1934 | Box 63 \ 3 scan0022 | |
| Striking experiment where a compression peak is cut-off. | 8th Jun 1934 | Box 63 \ 3 scan0023 | |
| Issues with fitting Philco wireless sets in cars and proposing standardized instructions. | 8th Jun 1934 | Box 63 \ 3 scan0024 | |
| Fitting of Philco wireless radio sets to R.R. & Bentley chassis. | 13th Jun 1934 | Box 63 \ 3 scan0025 | |
| Letter to Philco Radio & Television regarding the installation of radios and suppressors on a Bentley Chassis. | 13th Jun 1934 | Box 63 \ 3 scan0026 | |
| Letter discussing ignition spark theory and the potential effects of fitting sparking plug suppressors. | 14th Jun 1934 | Box 63 \ 3 scan0027 | |
| Letter page discussing leaky sparking plugs, potential misfiring, and suppressors. | 15th Jun 1934 | Box 63 \ 3 scan0028 | |
| Letter to Philco Radio & Television Corporation regarding issues with supplied suppressors and ferrules. | 15th Jun 1934 | Box 63 \ 3 scan0029 | |
| Letter from Joseph Lucas Limited discussing the theory of ignition and the effect of suppressors. | 15th Jun 1934 | Box 63 \ 3 scan0030 | |
| Letter from Joseph Lucas Limited regarding the effect of suppressors on engine power and ignition performance. | 15th Jun 1934 | Box 63 \ 3 scan0031 | |
| Planned visit to discuss complaints regarding wirelesses on cars. | 18th Jun 1934 | Box 63 \ 3 scan0032 | |
| Letter from Philco Radio and Television Corporation regarding brass ferrules and wiring diagrams. | 18th Jun 1934 | Box 63 \ 3 scan0033 | |
| Letter from Philco proposing a design for a Distributor Head Suppressor. | 22th Jun 1934 | Box 63 \ 3 scan0034 | |
| Outlining an investigation into the fitting of radio sets into R.R. and Bentley cars. | 22th Jun 1934 | Box 63 \ 3 scan0035 | |
| Investigation into ignition suppressor units, their effect on engine performance, and related complaints of radio interference and spark plug fouling. | 22th Jun 1934 | Box 63 \ 3 scan0036 | |
| Technical memorandum discussing ignition system issues, including spark plug gaps, suppressors, and coil/distributor screening. | 22th Jun 1934 | Box 63 \ 3 scan0037 | |
| Fitting 'Philco' car radios, discussing electrical interference suppression and correct wiring procedures. | 22th Jun 1934 | Box 63 \ 3 scan0038 | |
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