Index of Technical Features

Radio Record, Volume II, Issue 52, 12 July 1929, Page 38

Index of Technical Features

The index covers all the important technical and constructional features in Volume 1i-that i is from July 20, 1928, to July 12, 1929. Dates refer to 1929 unless followed by " 28" in. parentheses.

AERIAL. Choice of Receiving. Erecting 40-foot Mast, September 7 (’28). Frame, Tuning Capacities, August 10 (’28). Novel Indoor Antenna, October 26 (’28). Screening of, August 3 (’28). Trouble-free Pole, August 31 (’28). Various Systems of Aerials and Harths, March 28, AUDIO AMPLIFICATION. Audio Amplifier, February 1. Audio Frequency Choke Coils, June %, 14, Biasing of Amplifying Valves, April 19. Constructing Iron Core Choke Coils. November 16 (’28). Filter Choke, February 8. Improving Amplifiers, September 28 (?28). Modern Transformers, Adapting, September 28 (’28). Push-Pull Amplifier, November 2 (’28). Transformer Cores, September 21 (’28). Transformer Troubles, December 7 (’28). :

Transformers, Testing, August 24 (’28). Two-Stage Amplifier, July 27 (’28). BATTERIES. Battery. Connections, December " 98 (728). Charging, July 20 (’28). New Invention, September 7 (’28). Primary Batteries, January 4. Three to 6-amp. Charger, September 7 (728). Trickle Charger for both "A" and "B" Batteries, November 16 ('28). COILS. Coil-winding Jig, November 2 (’28). Construction of Tuning Coils, July 5. Layer Winding Made Easy, June 28. CRYSTAL. "Colvern" Receiver, July 20 (’28). Crystal Set and Wave Trap, November 9 (’'28). Full Wave Crystal Set, December 14 ° (728): Full Wave Variometer Crystal Set. March 1. . . Selective Crystal Circuit, October 26 (’28).

"Signal" Crystal Set, February 15. Three Crystal Circuits, December 28 (’28). Variometer Crystal Set, January 11. With Battery Potential, August 24 (28). CRYSTAL AMPLIFIERS. Crystal and Amplifier from A.C. Mains, November 16. (’28). Crystal and Valve with 3-valve performance, November 30 (’28). Crystal Set and Amplifier to work from 223 volts, December 14 (’28). EARTH. ‘Buried Type, September 28 (’28). ‘Hints on Securing Good Ground, December 14 (’28). ELIMINATOR. "A" Bliminators, October 5 ('28). Cheap Eliminator for Small Sets, June 21. Interference, Dealing with, July 27 (728). Notes on "B" Eliminator Construction, May 24. Regular Tube, July 27 (’28). Transformer for "B’" Eliminator, October 26 (’28). LOUDSPEAKERS. Double Roll, Constructing, September 7 (’28). Exponential Horn, A Successful Adaptation, January 11, Exponential Horn, Model to fit Cabinet. June 28. Hints on Operating a Loudspeaker January 11. Home-built Cone Unit, August 10 (’28). Home-made Dynamic Cone Speaker,

March 1, 8, Improving Smali Cone, September, 21 Improvised Speaker, April 19. (728). Linen Diaphragm Speaker, July 12. Matching * Impedances for Dynamic Cones, April 12. Mounting a Two-foot Cone Unit, June 28, Moving Coil BHxplained, August 31 (’28). Novel Loudspeaker, from "Omniphone" Unit, January 18. "Quality" Loudspeaker, May 8. MISCELLANEOUS. Backlash (reaction), August 17 (’28). Pros and Cons of Electrolytic Charg- | ers, February 8. Elimination of Static, December 7 (’28). Glossary of Wireless Terms, October . 26, November 2 (’28). Gramophone Pick-up, Principle of, September 28 (’28). A Home-made Testing Apparatus, February 1. List of New Zealand Amateur Transmitters, June 28. Methods of Checking Local Interference, May 24. Methods of Improving Reception, January 25. Phasatrol, August 31° (’28). Combating Static, October 26 (’28). Polish and Stain, November 25; Oak Finish, August 31 ('28).

Practical Hints on Neutralising, Janu ary 11, Radio Explained, January 4. Radio Terms, October 26 (’28). R.F. Amplification and Selectivity, September 14 (’28). R.F. Booster, May 10. Regeneration-In Theory and Practice, February 8. Shielding of Receivers, March 15. Soldering Hints, July 29, November 25, Useful Constructional Hints, April S. July 27 (728). Volume Control, Methods of, August 31 (’28). Wavelengths of American Stations, January 4. VALVES. Application of the Screen Grid, March 22 Comments on Valve Curves, June 7. Operation of the 5-electrode Valve. February 8. Pentode Valve Construction, November 9 (728). Screen Grid and Pentode, Cumparison and Contrast, January 4. Screen Grid and Pentode Valves, J une 28. 8-electrode Valve as Amplifier, May 10. 8-electrode Valves as Detectors, May 17, RECEIVING CIRCUITS. "Combination" Receiver, April 12. "Free Grid" One, December 28 (’28). "he Pentode Three," January 18. "Rotorua" Portable Receiver, Deceme ber 14, 21 (’28). "Round the World" Two, April 26. "Shielded Five" Neutrodyne, March 15.