"And Now—The Filamentless Tube," Radio-Craft, March 1933, pp. 528-29, 570. (PDF, 4.2MB, 3 pages). A press release regarding Dr. August Hund's cold-cathode tube. It appears that Dr. Hund was awarded US patent 1967009 for this device.

"Output Transformerless Amplifiers, A General Review," Wireless World, February 1957, pp. 58-62. (PDF, 4.3M) The PDF file also contains errata published in Wireless World, March 1957, p. 106.

Special Purpose Oscillators and Amplifiers TM-11-680. Washington D.C.: Department of the Army, July 1952. (PDF, 7.8M, 130 pages).

Andrew, A. M., "Differential-Amplifier Design," Wireless Engineer March 1955, pp. 73-79 (PDF, 749K) This document also includes follow up correspondence from J. Ross MacDonald published in July 1955.

Bailey, A. R., "New Phase Splitter," Wireless World, September 1962, pp. 411-413 (PDF, 5.2M) This document also includes follow up correspondence from D. F. Gibbs, T. S. Marshall, Thomas Roddam, P. A. Douvaletelis, P. Williams published in the 1962 November and December issues.

Baxandall, P. J. "Inexpensive 10-Watt Amplifier," Wireless World, August 1954. p. 398. (PDF, 1.8M) This document also includes some follow-up correspondence from D.J.R. Martin, J.K. Webb, and P.J. Baxandall regarding Joh Brighton's critique of the original article, published in Wireless World, January 1955, p. 21.

Baxandall, P. J. "Negative Feedback Tone Control," Wireless World, October 1952, pp. 402-405. (PDF 1.7M) Also contains errata published in Wireless World, November 1952.

Bessy, Carlton E. A High Quality Direct-Coupled Audio Amplifier Tele-Tech, September 1951, pp. 40-41, 73-74 (PDF 961K)

Boegli, Charles P. "The Degenerative Tone Control," Radio & Television News, June 1951, pp. 58-59, 96. (PDF, 557K)

Boegli, Charles P. "Simplified Cross-Coupled Amplifier," Radio & Television News, May 1959, pp. 62, 81. (HTML, 460K)

Brooks, Herbert B. Circular of the National Bureau of Standards, C408: Information for the Amateur Designer of Transformers for 25- to 60-Cycle Circuits. Washington D.C.: United States Government Printing Office, 1935. (PDF, 2.1M). The object of Brooks' circular according to its introduction is "to assist the amateur in the design of small and medium-sized single-phase transformers for operation in the usual power frequencies. It is assumed that one transformer, or at most a few transformers are to be built, and that successful operation with good-efficiency and reasonable cost is the goal...."

Bown, Ralph. "War-Time Development of Vacuum Tubes", Electrical World, vol. 73, no. 8, February 22, 1919, pp. 358-363 (PDF 1.5M, digitized by Google)

Bustard, Harold A. "Phase Inverters", Radio News, February 1946, pp. 57-60, 98-104 (PDF 2.6M)

Carpenter, R. E. H. "'See-Saw' or 'Paraphase'", Wireless World, September 1945, pp. 263-265 (PDF 2.2M) This is a response to Scroggie's article (below) outlining the see-saw phase inverter.

Chatterjee, A. K. and Fett, G. H. "Graphical Determination of Nonlinear Distortion" Radio & Television News Radio-Electronic Engineering, November 1950, pp. 10A, 31A (PDF 1.4M)

Dorf, Richard H. "Non-clipping Wave Squarer," Radio & Television News, March 1956, pp. 130, 132 (PDF 364K)

Dorf, Richard H. "The Universal Vibrato," Radio & Television News, April 1954, pp. 52, 53, 90-93. (PDF 2.7M)

Dorf, Richard H. "The Wurlitzer Vibrato," Electronic Musical Instruments, 2nd ed. Mineola, N.Y.: Radio Magazines, 1958, pp. 138-141. (PDF, 1.2M)

Ferras, Allan M. "A Bass-Boost Control," Radio & Television News, July 1954, pp. 52-53, 88. (PDF 3.9M, apologies in advance for the lousy copy)

Green, C. B., "Suppressor-Grid Modulation," Bell Laboratories Record, October 1938, pp. 41-44. (PDF 2.9M)

Grey, Geoffrey H. "Direct-Coupled Instrument Amplifier" Radio-Electronic Engineering Edition of Radio & Television News, July 1953, pp. 3-5, 25. (PDF 3.0M)

Gunderman, Robert J. "Electronic Audio Bandpass Filter," Radio & Television News, November 1953, pp. 16, 23. (PDF 380K)

Hedge, L. B. "Cascode A. F. Amplifier," Wireless World, June 1956, pp. 283-287 (PDF 837K) Besides an interesting preamp-phase-inverter design, this amplifier is notable as an early example that employs a three-way switchable pentode-ultralinear-triode mode power stage.

Hust, L. B. "Extended Class A Amplifier," Radio & Television News, September 1953, pp. 40-42, 146-148. (PDF, 1.8M)

Jones, T. Iorwerth. "The Dependence of the Inter-Electrode Capacitances of Valves upon the Operating Conditions" Proceedings of the Wireless Section of the Institution of Electrical Engineers, Vol. 13, No. 37, 1938, pp. 11-22 (PDF 1.4M)

Keeton, Don. "Audio Oscillator", Radio Craft, April 1946, p. 480. (PDF 40K).

Koller, L. R. The Physics of Electron Tubes. New York: McGraw-Hill Book Company, Inc., 1934 (PDF, 23M)

Lyddiard, J. A. "Cathode-Coupled Amplifier" Wireless Engineer March 1952, pp. 63-67 (PDF 553K) This document includes correspondence from I. F. MacDiarmid published in June 1952.

Macfadyen, K. A. "Modifications of the Push-Pull Output Stage, Parts I && II", The Wireless Engineer, October 1935, pp. 528-534 and December 1935, pp. 639-646 (PDF 1.2M).

Martin, A. V. J. "Factors Determining Tube Life", Radio & TV News, July 1957, p. 111 (PDF 1.1M).

Miller, Ed C. and Jones, T., "An Electronic Loss Compressor", Radio & Television News, November 1950, pp. 64, 110, 112 (PDF 1.1M)

Moog, Robert "The Theremin," Radio & Television News, January 1954, pp. 37-39 (PDF 610K)

Moses, Robert C. "Phase Angle Measurements at A.F." Radio-Electronic Engineering Edition of Radio and Television News July 1953, pp. 12-13, 21 (PDF 833K)

Moullin, M. A. "The Apparent Inter-Electrode Capacitance of a Planar Diode" Proceedings of the Wireless Section of the Institution of Electrical Engineers, Vol. 13, No. 37, 1938, pp. 23-32 (PDF 1.1M)

Peters, Daniel P. "In Defense of the Split-Load Phase Inverter," Radio and Television News, November 1957, pp. 182, 184 (1.8M)

Reed, Harold. "Simplifying Tone Control Circuits," Radio and Television News, March 1952, pp. 112-117 (585K)

Rider, John F. Vacuum Tube Voltmeters. New York: John F. Rider Publishing, Inc., 1941 (PDF, 21M)

Rider, John F. and Seymour D. Uslan. Encyclopedia on Cathode-Ray Oscilloscipes and Thier Uses. New York: John F. Rider Publishing, Inc., 1950 (PDF, 141M)

Scroggie, M. G. "The See-Saw Circuit" Wireless World, July 1945, pp. 194-196 (PDF 1.7M) See Carpenter's article (above) regarding the origin of this circuit.

Short, G. W. "Very High Stage Gains," Wireless World, February 1962, pp 75-76 (PDF, 404K)

Starr, A. T. and Hall, H. C. "A Nomogram for the Band Pass Filter (Zobel Type)," Journal of the Institution of Electrical Engineers, Vol. 75, No. 456 (December 1934), pp 749-754 (PDF, 573K)

Terman, Frederick E., "Regeneration in Multistage Audio- and Video-frequency Amplifiers," Electronic and Radio Engineering. New York: McGraw-Hill Book Company, 1955, pp. 360-363. (PDF, 565K)

Tepper, M. "Grid-Leak Bias," Basic Radio, Vol. 3: Electron Tube Circuits. New York: John F. Rider Publisher, Inc., 1961, p. 78 (PDF, 244K)

Transistor Applications, Inc., "Part 9 Power Converters," from A Handbook of Selected Semiconductor Circuits, prepared by Transistor Applications, Inc. for Bureau of Ships, Department of the Navy, NAVSHIPS 93484, NObsr 73231, 1960, pp. 9-1 to 9-31. (PDF, 1.7M)

Tyler, F. "Experiments 35-42, Section III: Experiments with Electronic Devices," Alternating Currents and Electronics. London: Edward Arnold (Publishers) Ltd., 1963. (PDF, 2.2M) These experiments are concerned primarily with measuring the static and dynamic characteristics of triodes.

Valley, George E. and Wallman, Henry, eds. Vacuum Tube Amplifiers. New York: McGraw-Hill Book Company, Inc., 1948.

Van Scoyoc, J. N., "A Cross Coupled Input and Phase Inverter Circuit," Radio & Television News, Radio-Electronic Engineering Edition, November 1948, pp. 6-9 (PDF 448K)

Wadsworth, T. "Wireless Section: Chairman's Address: A Review of Improvements in Cinema Sound Reproduction Since 1928," Proceedings of the Wireless Section of the Institution of Electrical Engineers, Vol. 13, No. 37, 1938, pp. 1-10 (PDF 1.4M)

Williams, Emrys, "A Note on Self-Bias Circuits," The Wireless Engineer & Experimental Wireless, November 1934, pp. 600-602 (PDF 644K)

Wilson, Alva R., "Unique Amplifier Features Phase Shift for 3D Effect," Radio & Television News, November 1953, pp. 80-82 (PDF 828K)