| Description | Date | Identifier | |
| Instruction sheet detailing a complaint and test results for a faulty Dynamo UR65 from Chassis 2-LC. | 25th May 1927 | Box 70 \ 3 scan0291 | |
| Instructions detailing an investigation into machine overheating and noise, attributed to the early setting of control brushes. | 29th Jun 1920 | Box 70 \ 3 scan0292 | |
| Examination of a faulty dynamo from chassis 2LC, where melted solder was caused by an incorrect control brush setting. | 26th May 1927 | Box 70 \ 3 scan0293 | |
| Instructions regarding a customer complaint about a Phantom Dynamo's charging rate. | 16th Jun 1927 | Box 70 \ 3 scan0294 | |
| Instruction sheet detailing the examination and noted faults of a dynamo with high output. | 23th Jun 1927 | Box 70 \ 3 scan0295 | |
| Instructions regarding an investigation into high output caused by the setting of control brushes. | 29th Jun 1920 | Box 70 \ 3 scan0296 | |
| Examination of a faulty dynamo from chassis 68-SC due to a high output complaint. | 25th Jun 1927 | Box 70 \ 3 scan0297 | |
| Instruction sheet to examine and report on several dynamos removed from various chassis. | 11th Aug 1927 | Box 70 \ 3 scan0298 | |
| Investigation report on a customer's faulty dynamo from chassis 97HC. | 16th Aug 1927 | Box 70 \ 3 scan0299 | |
| Fault analysis report on a machine detailing overheating, flashing brushes and a break in the armature winding insulation. | 29th Jun 1920 | Box 70 \ 3 scan0300 | |
| Fault report on a dynamo from chassis 97-HC, detailing an armature insulation fault and required repairs. | 17th Aug 1927 | Box 70 \ 3 scan0301 | |
| Investigation report on a faulty dynamo from chassis 26HC. | 17th Aug 1927 | Box 70 \ 3 scan0302 | |
| Instruction sheet detailing the condition and likely cause of failure for an electrical component. | 6th Dec 1924 | Box 70 \ 3 scan0303 | |
| Inspection report on an overheated Dynamo RU.65 from chassis 26-HC, detailing improper brush replacement and subsequent damage. | 17th Aug 1927 | Box 70 \ 3 scan0304 | |
| Investigation report into a faulty customer dynamo from chassis 99MC that was overheating and throwing solder. | 29th Aug 1927 | Box 70 \ 3 scan0305 | |
| Inspection report on an electrical component detailing issues such as severe commutator flashing, overheated field coils, and insulation breakdown. | 8th Dec 1924 | Box 70 \ 3 scan0306 | |
| Assistant's report on the investigation of a faulty chassis dynamo. | 1st Sep 1927 | Box 70 \ 3 scan0307 | |
| Instruction to examine a dynamo that has repeatedly failed on chassis 79 MC. | 14th Sep 1927 | Box 70 \ 3 scan0308 | |
| Instructions to inspect and report on four dynamos from different chassis. | 14th Sep 1927 | Box 70 \ 3 scan0309 | |
| Repeated failure of a dynamo on chassis 99-MC and the results of its examination. | 16th Sep 1927 | Box 70 \ 3 scan0310 | |
| Checklist of questions for inspecting various electrical system components, including fuses, cutouts, dynamo, and battery. | 16th Sep 1927 | Box 70 \ 3 scan0311 | |
| Instructions for diagnosing electrical faults in the charging system using a voltmeter. | 16th Sep 1927 | Box 70 \ 3 scan0312 | |
| Checking for electrical irregularities using voltmeter readings from the chassis and battery. | 16th Sep 1927 | Box 70 \ 3 scan0313 | |
| Instruction sheet detailing the examination of a customer's faulty dynamo from chassis 99.MC. | 16th Sep 1927 | Box 70 \ 3 scan0314 | |
| Instructions detailing a fault investigation on a dynamo, noting incorrect brush angles and concluding the dynamo was at fault. | 17th Sep 1927 | Box 70 \ 3 scan0315 | |
| Instruction sheet regarding a faulty Dynamo RE15 from Chassis 87RC. | 17th Sep 1927 | Box 70 \ 3 scan0316 | |
| Inspection report on a Dynamo RE15 from chassis 87-RC detailing faults found and proposed corrections. | 17th Sep 1927 | Box 70 \ 3 scan0317 | |
| Severely burnt-out dynamo from chassis 68HC, diagnosing an open circuit as the cause of overheating. | 23th Sep 1927 | Box 70 \ 3 scan0318 | |
| Inspection report on a faulty dynamo from chassis 26-RC, detailing the cause of failure. | 28th Sep 1927 | Box 70 \ 3 scan0319 | |
| Instruction to inspect a dynamo from chassis 69DC following a customer complaint of battery overcharging. | 24th Oct 1927 | Box 70 \ 3 scan0320 | |
| The examination of a dynamo from chassis 89-HC with excessive output. | 27th Oct 1927 | Box 70 \ 3 scan0321 | |
| Instructions to examine a dynamo from chassis 95 R.B. due to solder running at the commutator. | 31th Oct 1927 | Box 70 \ 3 scan0322 | |
| Instruction sheet reporting a burned-out field and run commutator joints on a dynamo from a New Phantom chassis. | 31th Oct 1927 | Box 70 \ 3 scan0323 | |
| Assistant's report on an overheated Dynamo No. ES.75 from Chassis 95-HC. | 2nd Nov 1927 | Box 70 \ 3 scan0324 | |
| Instruction sheet detailing the condition of a faulty Dynamo YM35 from Chassis 100RE. | 3rd Nov 1927 | Box 70 \ 3 scan0325 | |
| Instructions diagnosing a break in the dynamo-battery circuit. | 8th Dec 1924 | Box 70 \ 3 scan0326 | |
| Faulty Dynamo YM.35 from chassis 100-RE, detailing an assistant's findings on its dismantled condition and suspected cause of failure. | 3rd Nov 1927 | Box 70 \ 3 scan0327 | |
| Analysis of faulty Phantom dynamos, detailing different types and specific failure reports. | 15th Nov 1927 | Box 70 \ 3 scan0328 | |
| List of dynamo failures with their probable causes and complaints for early type models. | 1st Aug 1912 | Box 70 \ 3 scan0329 | |
| List of dynamo complaints and their probable causes of failure. | 23th Nov 1927 | Box 70 \ 3 scan0330 | |
| Instruction regarding Phantom dynamo failures where contact points have burned. | 23th Nov 1927 | Box 70 \ 3 scan0331 | |
| Instruction to examine and report on a faulty dynamo from Phantom chassis 18 R.C. | 25th Nov 1927 | Box 70 \ 3 scan0332 | |
| Instruction to examine and report on a swollen hose, worn control brush and burnt insulation on a Dynamo from a Phantom chassis. | 5th Dec 1927 | Box 70 \ 3 scan0333 | |
| The failure analysis of a 40/50 Dynamo from chassis 18-RC. | 1st Dec 1927 | Box 70 \ 3 scan0334 | |
| Technical report on an overheating dynamo from chassis 91-MC, which caused melted solder. | 9th Dec 1927 | Box 70 \ 3 scan0335 | |
| The failure analysis of a Dynamo TL.45 from chassis 37-DC, attributing it to insulation breakdown. | 14th Dec 1927 | Box 70 \ 3 scan0336 | |
| Requesting the urgent return of three customer-owned dynamos from another department. | 16th Dec 1927 | Box 70 \ 3 scan0337 | |
| Inconclusive investigation into a failed chassis dynamo, model JS.95M. | 16th Dec 1927 | Box 70 \ 3 scan0338 | |
| Receipt and onward sending of three machines. | 17th Dec 1927 | Box 70 \ 3 scan0339 | |
| Testing, required alterations, and production status of various dynamo machines. | 28th Dec 1927 | Box 70 \ 3 scan0340 | |
| Instructions regarding a returned dynamo from Cricklewood and narrow brush machines needed for production. | 12th Jan 1928 | Box 70 \ 3 scan0341 | |
| Report regarding a faulty Phantom Dynamo on chassis 83-HC, which is the second failure for this component. | 12th Jan 1928 | Box 70 \ 3 scan0342 | |
| Faulty Phantom dynamo with excessively high output. | 12th Jan 1928 | Box 70 \ 3 scan0343 | |
| Customer's faulty dynamo from chassis 49.MC, detailing overheating and wear issues. | 21th Jan 1928 | Box 70 \ 3 scan0344 | |
| Complaint regarding a faulty Dynamo with low output on chassis 92-RC, requesting an examination and repair cost. | 23th Jan 1928 | Box 70 \ 3 scan0345 | |
| Inspection report on a customer's dynamo (YL.95) from chassis 5-LC, identifying melted solder caused by its early C angle design. | 6th Feb 1928 | Box 70 \ 3 scan0346 | |
| Inspection report on a customer's faulty dynamo from chassis 119.LC. | 18th Feb 1928 | Box 70 \ 3 scan0347 | |
| Customer complaint regarding the inefficiency of a dynamo on chassis 93-LF during long night journeys. | 23th Feb 1928 | Box 70 \ 3 scan0348 | |
| Note regarding complaints about dynamo inefficiency, which is now under consideration. | 27th Feb 1928 | Box 70 \ 3 scan0349 | |
| Customer complaints about insufficient dynamo output at high speeds on long night journeys. | 27th Feb 1928 | Box 70 \ 3 scan0350 | |
| Modifications to a dynamo to handle higher loads without overheating. | 27th Feb 1928 | Box 70 \ 3 scan0351 | |
| From EFC to BY/C referring to a separate report for notes and answers. | 27th Feb 1928 | Box 70 \ 3 scan0352 | |
| A suggestion for a reduced charging rate feature, which Mr. Royce had previously not favoured. | 1st Mar 1928 | Box 70 \ 3 scan0353 | |
| Low output Phantom dynamo removed from the Earl of Northbrook's car, chassis 70-YC. | 3rd Mar 1928 | Box 70 \ 3 scan0354 | |
| Repair and modification of dynamos for chassis 70-YC and GHJ-34. | 5th Mar 1928 | Box 70 \ 3 scan0355 | |
| Complaint of low output from a Phantom type dynamo on chassis 78-DC. | 5th Apr 1928 | Box 70 \ 3 scan0356 | |
| Instructing the reconditioning of a 40/50 dynamo RE25 to replace a modified machine for a customer. | 10th May 1928 | Box 70 \ 3 scan0357 | |
| Complaint of 'High Output' from a Phantom type Dynamo, chassis 103.DC. | 14th May 1928 | Box 70 \ 3 scan0358 | |
| The Phantom Dynamo's non-adjustable control brush and accumulator charging rates for chassis 79-AL. | 7th Sep 1928 | Box 70 \ 3 scan0359 | |
| Dynamo repairs and modifications for various car models for the month ending 15.12.30. | 17th Dec 1930 | Box 70 \ 3 scan0360 | |
| Monthly repair report detailing the status of various automotive components and the faults found. | 17th Dec 1930 | Box 70 \ 3 scan0361 | |
| Repairs received for various electrical components between December 1930 and January 1931. | 3rd Feb 1931 | Box 70 \ 3 scan0362 | |
| List of faults and repair notes for various types of dynamos. | 3rd Feb 1931 | Box 70 \ 3 scan0363 | |
| Dynamo charging fault on Chassis 123. GY from Rippon Bros. Ltd. | 2nd Sep 1931 | Box 70 \ 3 scan0364 | |
| Complaint from Rippon Bros. Ltd. about a faulty dynamo on a Phantom II, chassis 123.GY. | 2nd Sep 1931 | Box 70 \ 3 scan0365 | |
| Complaint about a faulty dynamo with a dead short and sticking brushes from chassis 153.XJ, a Phantom II. | 7th Oct 1931 | Box 70 \ 3 scan0366 | |
| Faulty dynamo from chassis 43.EH, detailing its issues and repair status. | 29th Oct 1931 | Box 70 \ 3 scan0367 | |
| Two dynamos returned from chassis 55-GX and 52-GX due to noise, requesting an examination and cost assessment for repairs. | 30th Dec 1931 | Box 70 \ 3 scan0368 | |
| Water ingress and noisy brushes found in the dynamos of chassis 55.GX and 52.GX. | 31th Dec 1931 | Box 70 \ 3 scan0369 | |
| Cover note for a list detailing E.O.6 Magnetos returned to Messrs. North over a 6 month period. | 30th May 1927 | Box 70 \ 3 scan0370 | |
| List of Watford magnetos returned over the past 6 months for 40/50 and 20 HP models. | 30th May 1927 | Box 70 \ 3 scan0371 | |
| Including technical reasons in reports for returned magnetos. | 31th May 1927 | Box 70 \ 3 scan0372 | |
| Reasons for rejecting 83 magnetos over a six-month period. | 2nd Jun 1927 | Box 70 \ 3 scan0373 | |
| Correspondence regarding a magneto failure on Chassis 1-WJ, quoting the maker's report on required repairs and causes. | 20th Jun 1930 | Box 70 \ 3 scan0374 | |
| From PN to EFC regarding a magneto failure on trials car chassis No. 1-WJ. | 23th Jun 1930 | Box 70 \ 3 scan0375 | |
| Potential magneto failure due to increased resistance in the secondary circuit. | 24th Jun 1930 | Box 70 \ 3 scan0376 | |
| Complaint from Rippon Bros. Ltd. regarding a faulty starter motor on chassis GAJ-14. | 15th Feb 1928 | Box 70 \ 3 scan0377 | |
| Clarifying a misunderstanding regarding a chargeable starter motor repair on Chassis 34 XJ, damaged by driver error. | 22th May 1931 | Box 70 \ 3 scan0378 | |
| The failure of a starter motor on chassis 34-XJ due to improper assembly and customer misuse. | 23th May 1931 | Box 70 \ 3 scan0379 | |
| Faulty A.T. Speedometer reading, which varies with temperature. | 2nd Mar 1928 | Box 70 \ 3 scan0380 | |
| Temperature performance and calibration of an A.T. Speedometer. | 5th Mar 1928 | Box 70 \ 3 scan0381 | |
| Faulty switchbox returned due to a burnt out contact. | 9th Aug 1927 | Box 70 \ 3 scan0382 | |
| Faulty switchbox on Chassis 35-DC, requesting an examination and advice on repair costs. | 24th Feb 1928 | Box 70 \ 3 scan0383 | |
| Arranging for a chief electrician to visit Derby for training on the repair of chassis switchboxes. | 27th May 1931 | Box 70 \ 3 scan0384 | |
| Cover for electrical production tests, series EAC.II. | 8th May 1925 | Box 70 \ 4 scan0001 | |
| Reference note pointing to previous correspondence regarding 40/50 Production Tests. | 23th Jan 1925 | Box 70 \ 4 scan0002 | |
| Production test specifications for EAC 'V' series chassis units. | 23th Jan 1925 | Box 70 \ 4 scan0003 | |
| Dispatching two copies of production inspection and test specifications for various EAC electrical equipment components. | 24th Jan 1925 | Box 70 \ 4 scan0004 | |
| The completion of electrical production test specifications for the 'V' series chassis. | 13th Feb 1925 | Box 70 \ 4 scan0005 | |
| Distributing specifications for Electrical Production Tests for the EAC 'V' Series units. | 13th Feb 1925 | Box 70 \ 4 scan0006 | |
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