Seeking Articals On Audio Transformer Design & Construction.

[kimbal]

Hi All -

I'm seeking ANY of the following articles listed below on Transformer design to build up my collection. Some articles I have sourced from the Internet already, but many are still unavailable.
Should you have anything available please email me with what your happy to help with.
I'm very interested in clear copies of the N.Partridge articles and the N.Crowhurst documents and the last one by C.R.Hanna.
My email address is below in the bottom left hand corner. - Thankyou - Kimbal >

1. Ideal Output Transformers for Impedance Matching - Author Unknown 22 Pgs.
2. Output Transformer Design Considerations - W.R. Ayers 1 Pg.
3. Output Transformers: Part 1 - James Moir 3 Pgs.
4. Output Transformers: Part 2 - James Moir 6 Pgs.
5. Design of the Output Transformer: Parts 1 & 2 - Hitchcock & Osbon 6 Pgs.
6. Transformer Distortion: Parts 1 & 2 - Dunford Kelly 10 Pgs.
7. How Good is an Audio Transformer ? - N.H. Crowhurst 3 Pgs.
8. Measuring up an Audio Transformer - N.H. Crowhurst 4 Pgs.
9. Making The Best of an Audio Transformer - N.H. Crowhurst 5 Pgs.
10. Output Transformer Design - N.H. Crowhurst 11 Pgs.
11. Audio Transformer Design - N.H. Crowhurst 13Pgs.
12. Audio Transformers CAN Be Good - N.H. Crowhurst 5 Pgs.
13. Leakage Inductance - N.H. Crowhurst 7 Pgs.
14. Leakage Inductance: A Useful Circuit Component - N.H. Crowhurst 5 Pgs.
15. Winding Capacitance - N.H. Crowhurst 8 Pgs.
16. Transformer Iron Losses - N.H. Crowhurst 12 Pgs.
17. Winding Space Determination - N.H. Crowhurst 5 Pgs.
18. The Design of High Q Iron Cored Inductors - N.H. Crowhurst 6 Pgs.
19. Input Transformer Design - N.H. Crowhurst 7 Pgs.
20. About Output Transformers - N.H. Crowhurst 2 Pgs.
21. Using Audio Transformers - Herbert Ravenswood 4 Pgs.
22. Is the Output Transformer Out ? - Herbert Ravenswood 4 Pgs.
23. A New Stereophonic Amplifier - N.H. Crowhurst 7 Pgs.
24. Quasi Transients in Class B Push-Pull Amps - Pen-Tung Sah 20 Pgs.
25. Class B Power Amp Distortion Using Tapped Transformers R.G. De Buda 6 Pgs.
26. The Pass Band of a Transformer-Coupled Amp. J.F. Sodaro 2 Pgs.
27. New Look in Transformers - John R. Collins 3 Pgs.
28. Arnold Silectron Cores - Author Unknown 16 Pgs.
29. New Transformer Design for Power Amplifiers - Charles Graham 4 Pgs.
30. Hermetically Sealed Transformers - Robert M. Hanson 4 Pgs.
31. Notes on Transformer Design - E.B. Harrison 6 Pgs.
32. UL Output Transformers - Leakey & Gilson 4 Pgs.
33. Soft Magnetic Materials for Audio Transformers - G.A.V. Sowter 18 Pgs.
34. New Materials & Techniques in Hi-Fi Transformer Design - Lewis W. Howard 3 Pgs.
35. Eddy Currents in Composite Laminations - Peterson & Wrathhall 12 Pgs.
36. Recent Transformer Developments - Reuben Lee 4 Pgs.
37. Amplifier and Output Transformer - F. Langford-Smith 1 Pg.
38. Output Transformer Efficiency - A.E. Falkus 1 Pg.
39. Simplified Transformer Testing - J. Skinner 2 Pgs.
40. Measuring Distributed Capacitance of Coils - John A. Connor 2 Pgs.
41. Choke and Transformer Testing - Test Engineer 2 Pgs.
42. Optimum Use of Nickel Alloy Steels in Low-Level Transformrs - L.W. Howard 3 Pgs.
43. Wideband Series-Parallel Transformer Design - Vincent C. Rideout 1 Pg.
44. Output Transformers: The Effect of Resistance - N. Partridge 3 Pgs.
45. AF Transformers Simplified - N. Partridge 2 Pgs.
46. Efficiency of Inductive Coupling A.C. - Hudson 1 Pg.
47. What is “Q”? - Joseph Tusinski 2 Pgs.
48. Low “Q” Resonance - Joseph Tusinski 2 Pgs.
49. Soft Magnets for Amplifiers - George Sideris 1 Pg.
50. Output Transformer Chart - Author Unknown 1 Pg.
51. AN 0.3 - Page 10 ♦ Transformers - David Hafler 4 Pgs.
52. HT Transformer Construction - N. Partridge 3 Pgs.
53. Lamination Design - N. Partridge 4 Pgs.
54. Transformer Distortion - N. Partridge 5 Pgs.
55. Diverse Transformer Loading - N. Partridge 3 Pgs.
56. Distortion in Transformer Cores: Parts 1—4 - N. Partridge 16 Pgs.
57. The Prediction of Audio-Frequency Response: Parts 1—3 - N.H. Crowhurst 22 Pgs.
58. Data Sheets for the Prediction of Audio-Frequency Response - N.H. Crowhurst 10 Pgs.
59. The Use of Twin-T Networks - N.H. Crowhurst 8 Pgs.
60. Design of Reactors and Transformers Which Carry Direct Current", C.R. Hanna, Journal AIEE, Vol. 46, February 1927

 

[trobbins]

Maybe if you make a link to versions of the articles you already know of - eg. the Partridge articles from WW 1939 - then that would save people having to check and/or inform you of articles that are presently on the web that you already know about. Also, it is worth citing all reference details (or at least year, and publication, if you know those), and perhaps order the list by date or author (surname) or title.

Also, did you want links to other audio transformer related articles not on that list - eg http://dalmura.com.au/projects/High Power Audio Transformers.pdf

 

[dirkwright]

Instead of the internet, have you checked with your public or university library for an interlibrary loan?

 

[kimbal]

Instead of the internet, have you checked with your public or university library for an interlibrary loan?

Nothing in my local library and bigger libraries are interstate or out of public assess; plus you can't borrow from them unless you in a University or some other important position.
I can source some stuff on the internet - but you have to pay for it and join up as a member. Their membership costs are exorbitant for what you get.