PHYSICS and ELECTRONICS APPARATUS, CIRCUITS, ETC.
Designed and/or Built by H. W. Gould


PHYSICS APPARATUS

  1. Mercury Barometer, using hearing aid battery mercury. (c. 1945)
  2. Crookes Tube. (c. 1945) Involved first learning glass blowing.
  3. X-Ray Tube. (Designed 13 April 1946 and built shortly after.)
  4. Radium Spinthariscope. Built inside a metal radio tube case (1946)
  5. Gold Leaf Electroscope. (c. 1945)
  6. Geiger Counter Tube. (c. 1945)
  7. Geiger Counter amplifier, counting circuit, and oscilloscope
      display. (c. 1945) Improved oscilloscope designed and built 1954.
  8. Millikan Oil-Drop Apparatus to measure electron charge (1945)
  9. Ozone generator. (1944)
10. Arc Welding Unit and Arc Lamp. (1943)
11. Felix Ehrenhaft Magnetic Current Motor. (1944)
12. Jacob's Ladder. (c. 1944) Uses 10,000 volt neon transformer.
13. Tesla/Oudin Coil, One million volt discharge; Six foot secondary
      coil. (1944-45) 2-foot primary coil form built by my father.
      (Two versions of secondary coil.) Glass plate capacitor, rotary spark.
      Coil is driven by 15,000 volt transformer.
14. Tesla Coil, "Cigar Box" type with vacuum tube oscillator (1945).
      This uses a type 10 vacuum tube for the oscillator.
15. Cigar Box Tesla Coil built for, and sold to, Norfolk County, Virginia,
      Teaching Aids Library at request of Hubert J. Davis, Director.
      (1946)
16. Circuit Design and Parts List for Mr. Davis at Department of  Public
      Schools, Fredericksburg, Va. (1954), for cigar box Tesla coil. Models
      were used by him to teach electronics in Southeastern US schools.
17. Fountain Pen Neon Tester. (1945)
18. Electrodeless Neon Glow Tube for RF Field Testing. (c. 1945)


ELECTRONIC APPARATUS

  1. One-tube radio set. 1939.
  2. Miniature Super-regenerator Portable Radio (1S4 tube). (1948)
      Housed in wooden case built by my father.
  3. Matchbox Crystal Set. (several variations, c. 1943 and later)
  4. Transmitter with push-pull type 45 tubes in output. (1943-44)
  5. Breadboard 6L6G crystal-controlled transmitter for 40 meters
     (1955)
  6. Audio Consolette for WUVA radio station at University of
      Virginia (1954). (Modification of the original 1947 Stromberg
      Carlson amplifier that was used at the station when it began
      broadcasting in 1947)
  7. Transistorized Field Strength Meter. (1956)
  8. Germanium Diode Noise Clipper. (1970)
  9. Keying Relay for transmitter. (1977)
10. Self-Powered Keying Monitor. (1956)
11. Audio Amplifier built for Bernard Brown. (Oct.-Dec. 1947)
12. Automobile Headlight radio receiver. (c. 1954)
      (dual filament bulb acts as diode detector)
13. Phonograph Amplifier Model A-1. (1949) Sold to Bernie Tallman.
14. Single-ended pentode Audio Amplifier, 10 watts. (Sept.1948)
15. A.C. Impedance Bridge with Calibration Chart. (1950)
16. 6H6 Diode Oscillator Unit. (1946)
17. Z-Axis Scope Input. (for 3-dimensions. c. 1954)
18. Scale of 16 Relay Counting Unit. (1946)
19. Cathode-Ray Oscilloscope, 2-inch screen, Improved model.
      (c. 1954)
20. Tabet Model PR Photoelectric Control, working model (1952)
21. Reflex-Regenerator Radio Receiver. (Published July 1945)
22. Superregenerator for FM Reception. (Published March 1948)
23. Wireless Code Oscillator Set. (1939-41;  improved 1955)
24. Electronic Relay for Keying Transmitter; first model. (1955)
25. Philmore 2 Tube AC-DC Regenerative Receiver. (1944)
26. 112-116 MHz W.E.R.S. (War Emergency Radio Service) Transceiver
      for Civil Defense work (1944-45) used at my station WJWB-12,
      Portsmouth, Va.
27. Modified Packard Bell Model 36 Radio Receiver. (1943/54)
28. Hallicrafters Model S-19 R Sky Buddy Modifications. (1955)
      This included voltage regulator, noise clipper, etc.
29. Receiver RF Preselector for S-19R Receiver. (1955)
30. 6-Volt Vibrator Power Supply for use in 1939 Chevrolet Car.
      Used to power S-19 R radio receiver (1954)
31. 5-Tube Economy Radio Receiver. (1952; started by B.W. Tallman)
32. Small 6F6 Transmitter with 6F6 modulator. (1952/1954)
33. Miniature 117L7/M7-GT/G Transmitter and Crystal Exciter.
      (1955)
34. VFO 6AG7 Buffer-Doubler Exciter. (1956-58)
35. 1000 Hertz Audio Oscillator with type 26 Tube. (c. 1946)
36. Capacity-type Wheatstone Bridge, to measure capacitance and
      inductance. (c. 1946)
37. 100 KiloHertz Crystal Frequency Standard; handground crystal.
      (1958) Built using 98.3 KHz crystal from US Army SG Radar set.
      This required to edge grind crystal to 100 KHz.  Frequency divider.
      This equipment was used in making precise frequency measurements
      as an Official Observer for the American Radio Relay League,
38. Type 6SK7 Pierce Oscillator for 100 Hertz Crystal (1954).
      Circuit obtained from the scientist who developed the SG radar.
39. Type 6E5 Tuning Indicator for 1939 Farnsworth Radio. (1954)
40. SVU Meter (Signal Strength and Volume Units). (1954)
41. Power supply for SVU meter and Crystal Calibrator. (1956)
42. 955 Acorn Tube Superregenerative Receiver for FM Band. (1954)
43. 955 Acorn Tube 250-400 Mhz. Oscillator and Grid-Dip Meter.
      (1954)
44. Hi-Fidelity All Triode Audio Amplifier (6A3 Outputs). (1954)
45. Smaller model of the All-Triode HI-FI Amplifier. (1954-55)
46. Phonograph Cueing Monitor Amplifier for Station WUVA. (1954)
47. Inductance-Capacitance Polar Coordinate Oscilloscope Generator.
      (1945)
48. Electronic Timer with 117L7/M7-GT tube. (1945)
49. Neon Bulb Capacitor/Short Circuit Tester. (1943)
50. Neon Bulb Relaxation Oscillator Capacitor Tester. (1945)
51. Electrolytic Capacitor Tester. (c. 1945)
52. 40-20 Meter CW Ham Transmitter and Station Control (1955-58).
      Designed around modified surplus ARC-5 Transmitters. 75 watts.
      Involved designing a buffer stage to prevent chirping, and making
      a 20-meter doubler from a second ARC-5 unit. Using this gear at
      ham radio station K4CQA I contacted all states and 100 countries.
53. 75-Watt 807 Ham Transmitter for 80 and 40 meters. (1955)
54. Clamp Tube Modulator for 807 Transmitter. (1955)
55. Plug-in Crystal Oscillator for ARC-5 Transmitter. (1956)
56. Regulated Power Supply & Control Unit for K4CQA Transmitter.
      (1955)
57. Small 80 Meter 6AG7 VFO-exciter. (1955)
58. Handset Circuit Control for K4CQA station. (1957)
59. Transistorized Field Strength Meter. (1955/56)
60. Germanium Diode Noise Clipper. (1956)
61. 60 DB Audio Peaking or Dipping Filter for CW Work. (c. 1956)
      This uses an inductance/capacitance circuit resonant at about 1200 Hz.
62. Emergency 10-Meter 807 Transmitter. (c. 1946)
63. QSL-Size Superregenerative Receiver. (1955)
64. Multimeter designed and built for chemist Leslie Kane, Morgantown, WV
      (1968) (Have photo of this)
65. VOM Multimeter designed and built during WW2 (c. 1943). Still operates.
66. Electronic Key paddle and contact set. (c. 1955)
67. Quarter Wave Ground Plane Antenna for 2 Meter Mobile. (1985)
68. Lecher Wire system for 2-inch 600-Ω feeders for 112-116 MHz.
      Included Folder Dipole Antenna. (1944)
69. 110 Volt Tool Demagnetizer. (c. 1952)
70. Improved Transmitter circuit for WUVA Radio Station. (1948)
      Letter from Station Manager Felix M. Hoffman attests to improved
      performance of WUVA due to my work (1951).
71. Type 6L6 Carrier Current Broadcast Band Transmitter. (c. 1944)
      (Used to broadcast music in home neighborhood.)
72. RCA Electronic Lab. kits, using type EK-1000 tube (c. 1940)
73. NRI test set and other radio kits (1943-47)
74. Cigar box voltage-current test set (c. 1943) (Have photo of this)
75. 100 mw. 40 meter cw transmitter using two transistors. (1956)
76. 5 Volt, 20 ampere Transformer; wound by hand. (c. 1945)


______________________________________
List compiled 28 November 1995; revised 19 June 2008
For use in preparing a handbook of these circuits and devices.