Ce diaporama a bien été signalé.
Nous utilisons votre profil LinkedIn et vos données d’activité pour vous proposer des publicités personnalisées et pertinentes. Vous pouvez changer vos préférences de publicités à tout moment.

再生接收機工作坊 - Regenerative Radio Workshop

1 061 vues

Publié le

Sec. 1 - Radio architectures overview
Sec. 2 - My recent own homebuilt Radios

Publié dans : Ingénierie
  • Soyez le premier à commenter

  • Soyez le premier à aimer ceci

再生接收機工作坊 - Regenerative Radio Workshop

  1. 1. Regenerative Radio Workshop by D.C. 2017/03/6 @Ultron
  2. 2. about.me • Born in Kaohsiung, 1994 • FHCRC.102nd • Studying EE @ FJU • Joined Arduino.Taipei ( since 2013 ) • • • / Maker My Blog : http://davidchensbase.blogspot.tw
  3. 3. Radio Spectrum • IARU / CTARL / ARRL • ITU / NCC / FCC • LF / MF / HF / VHF / UHF / SHF / EHF [wiki] • Spectrum Analyzer / FFT / Superheterodyne • Cycle per second ( cps ) / Hertz ( Hz ) [wiki] • 80 meters / 40 meters  Speed of light [link] Image via : GWInstek
  4. 4. via : Flickr
  5. 5. via : NCC
  6. 6. Software Defined Radio ( SDR )
  7. 7. Shortwave Radio Antenna: Voice of America Delano Transmitting Station. ( via wiki )
  8. 8. A collection of early quartz crystal frequency standard units used in crystal oscillators, produced by Bell Labs/AT&T/Vectron International. ( via wiki )
  9. 9. A pair of 1968 Heathkit vibrators ( via wiki )
  10. 10. Architectures of Radio Receivers • Crystal Radio ( ) • Tuned radio frequency ( TRF ) – • Reflex receiver – • Homodyne ( Direct-Conversion ) – • ( Super ) regenerative – ( ) • Autodyne – • ( Super ) heterodyne – ( ) • ( heterodyne / regenerative / autodyne ) detection • / / Image : A drawing of an early vacuum tube radio receiver and horn loudspeaker, from an advertisement in a radio magazine around 1922. ( via wiki )
  11. 11. Crystal Radio • Crystal Radio ( ) • Cat's whisker detector ( Galena ) • Germanium transistors • Crystal earpiece • Needs well grounding • Variable L/C • Easy to make • Sensitivity : Poor • Selectivity : Poor • Signal to noise ratio ( SNR ) : Poor Image : Sketch of crystal radio set. ( via wiki )
  12. 12. Block diagram of a crystal radio receiver . ( via wiki )
  13. 13. A circuit of an inductively-coupled crystal radio receiver with impedance matching. ( via wiki )
  14. 14. Crystal radio diagram in 1922. This circuit did not use a tuning capacitor, but used the capacitance of the antenna to form the tuned circuit with the coil. ( via wiki )
  15. 15. Ernst Jahnke crystal radio receiver, ca. 1924-1926. ( via wiki )
  16. 16. Tuned radio frequency ( TRF ) receiver • Tuned radio frequency ( TRF ) receiver • by Ernst Alexanderson, 1916 • RF Amplifiers / Active Filters • IC ZN414 / MK484 / TA7642 • Neutrodyne receiver – • by Louis Hazeltine, 1922 • Preventing oscillations • Reflex receiver – • by Wilhelm Schloemilch and Otto von Bronk, 1914 • Feedback loop Image : Top view of the Leutz Transoceanic "Phantom" radio receiver with its cover removed, from 1927. ( via wiki )
  17. 17. Tuned radio frequency ( TRF ) receiver • Pros • Active band pass filter • Cons • Hard tuning, hard to build, large • Sensitivity : Medium • Selectivity : Poor • Signal to noise ratio ( SNR ) : Medium Image : The first Neutrodyne radio receiver, built by Louis Hazeltine and presented at the March 2, 1923 meeting of the Radio Society of America ( via wiki )
  18. 18. Block diagram of TRF receiver ( via wiki )
  19. 19. A typical tuned radio frequency ( TRF ) radio receiver circuit from 1924. ( via wiki )
  20. 20. Six tube radio receiver from about 1920. ( via wiki )
  21. 21. A basic circuit using the ZN414 AM detector transistor . ( via wiki )
  22. 22. A hand made matchbox radio using the MK484 IC ( via mds975.co.uk )
  23. 23. Tuning stage comparison between common TRF receivers and Neutrodyne receivers. ( via wiki )
  24. 24. The first neutrodyne radio receiver, presented by Louis Alan Hazeltine in a lecture on March 2, 1923 titled "Tuned radio frequency amplification with neutralization of capacity coupling" to the Radio Club of America at Columbia University. ( via wiki )
  25. 25. Block diagram of a simple single-tube reflex radio receiver ( via wiki )
  26. 26. Circuit diagram of a reflex receiver. One transistor amplifies both high frequency and low frequency. ( via wiki )
  27. 27. A handmade 2 transistor reflex radio. ( via )
  28. 28. Homodyne Receivers • Homodyne receiver ( Direct-Conversion / Zero-IF ) • Mixer + Local Oscillator • Low convert to DC • Regenerative receiver • by Edwin Armstrong, 1912 • No significant Mixer and LO • Autodyne mixer ( Mixer / LO 2 in 1 ) • Hartley / Colpitts configuration • Hysteresis – • Nearly self-oscillating • Regenerative control Image : An early vacuum tube regenerative radio receiver from 1922. ( via wiki )
  29. 29. Super-regenerative Receivers • Super-regenerative • by Edwin Armstrong, 1922 • Quench oscillator in supersonic ( 30~100kHz ) • Oscillations were interrupted periodically • Pros • Simple, easy to make • Cons • Oscillator signal propagates through antenna • Signal interfered by flicker noise • Sensitivity : Excellent • Selectivity : Medium • Signal to noise ratio ( SNR ) : Poor Image : American radio researcher Edwin H. Armstrong and his new invention, the superregenerative receiver in 1922. ( via wiki )
  30. 30. Block diagram of a regenerative radio receiver ( via wiki )
  31. 31. Vacuum tube regenerative receiver with Armstrong oscillator schematic. ( via wiki )
  32. 32. Homebuilt Armstrong one-tube regenerative shortwave radio with construction characteristic of the 1930s - 40s. ( via wiki )
  33. 33. Homebuilt Armstrong one-tube regenerative shortwave radio with construction characteristic of the 1930s - 40s. ( via wiki )
  34. 34. Schematic of the simple regen receiver A Simple Regen Radio for Beginners – ARRL ( via )
  35. 35. A High Performance Regenerative Radio - Circuitsalad ( via )
  36. 36. Block diagram of a super-regenerative radio receiver ( ref )
  37. 37. A High Performance Regenerative Receiver High Performance Regenerative Receiver Design - ARRL ( via )
  38. 38. CK-103 FM ( via )
  39. 39. Superheterodyne Receivers • Heterodyne receiver • by Reginald Fessenden, 1901 • Failed on the stability of LO ( ppt accuracy ) [wiki] • Continuous Wave ( CW ) receiver • Heterodyning Animation [link] • Super-heterodyne receiver • by Edwin Armstrong, 1918 • Supersonic IF stage ( 455kHz, 10.7MHz…etc ) • Stable, reliable until the transistor era [wiki] • Regency TR-1 • Sony TR-52 / TR-55 Image : One of the first prototype superheterodyne radio receivers built by inventor Edwin Armstrong. ( via wiki )
  40. 40. Superheterodyne Receivers • Pros • Simple / stable enough to commercialize • Excellent performance • Cons • More stages than a regen radio • Tracking LO and Image filter • Sensitivity : Excellent • Selectivity : Excellent • Signal to noise ratio ( SNR ) : Excellent Image : American engineer Edwin with his new wife and a portable superheterodyne radio receiver. ( via wiki )
  41. 41. Block diagram of a superheterodyne receiver. ( via wiki )
  42. 42. Graph showing how a superheterodyne radio receiver receives a radio signal, shifting it down to the IF frequency. ( via wiki )
  43. 43. "All American Five" vacuum-tube superheterodyne AM broadcast receiver from 1940s. ( via wiki )
  44. 44. "All American Five" vacuum-tube superheterodyne AM broadcast receiver from 1940s. ( via wiki )
  45. 45. Vintage Regency TR-1 Transistor Radio, Made in the USA ( via wiki )
  46. 46. Vintage Regency TR-1 Transistor Radio. ( via wiki )
  47. 47. Inside view of Regency model TR-1 transistor receiver showing layout of components. ( via radiomuseum )
  48. 48. A copy of the patent of Regency TR1, by Richard Koch, assigned to I.D.E.A. ( via radiomuseum )
  49. 49. The Schematic diagram of the of Regency model TR-1 ( via radiomuseum )
  50. 50. S66D ( via )
  51. 51. TR-52 Sony ( ) 1955 1 . ( via wiki )
  52. 52. Double conversion superheterodyne block diagram ( via wiki )
  53. 53. DIY SDR HF Up-Converter forr RTLSDR by WA7JHZ . ( retrovoltage.com )
  54. 54. DIY SDR HF Up-Converter forr RTLSDR by WA7JHZ . ( retrovoltage.com )
  55. 55. • FM • • FM / AM • • ( RTL-SDR ) • 60MHz • Manhattan-style Circuit Construction [Link] • A Simple Regen Radio for Beginners – ARRL [Link] Image : IC – CD9088 AM / FM
  56. 56. FM SCAN RESET
  57. 57. FM Transmitter Bugs
  58. 58. Astable Multivibrator Kit
  59. 59. ( 2014~2015 ) Buck/Boost/Linear Regulators, more Crystal Radios and FM Txs
  60. 60. ( 2015~2016 ) More Radios ( RX ) / Audio Amps & Testing Tool
  61. 61. A Simple Regen Radio for Beginners By Charles Kitchin, N1TEV • BJT ( 2N2222 ) • LM386 • Hartley : 2L1C • Fine Tune • FM !? • • 5.6~11.9MHz ( Pi-FM-RDS )
  62. 62. 2N2222
  63. 63. High Performance JFET Regen by Ray Charles Ring, circuitsalad.com • Common Gate Antenna Buffer • JFET • LM317 5V • LM386 ( TDA7052 ) • 50K JFET LM386 • Colpitts :1L2C • PCB • Toroid • [Link1] [Link2] • 5~18MHz
  64. 64. T50-52 ( / ) 5uH
  65. 65. T37-6
  66. 66. / L
  67. 67. Poor man’s solutions • Calculators • Toroid coil calculator [Link] • Air coil calculator [Link] • LC tank Frequency Calculator [Link] • Google Search Plot [Link] • Android APP - ElectroDroid [Link] • Simulators • GNURadio [Link] • Falstad Circuit Simulator [Link] • Audacity [Link]
  68. 68. • Measurements • Cheap sound card as a signal generator • Arduino • Frequency Generator [Link] • Frequency Counter Library [Link] • FHT Library [Link] • Serial Plotter [Link] • Pi-FM-RDS Project [Link] • AVR Component Tester [Link] • RTL-SDR / SDR-Sharp [Link] • Making • Self-designed Manhattan Circuit Helper [Link] Poor man’s solutions
  69. 69. References • Wikipedia • Radio receiver [Link] • Crystal Radio [Link] • Tuned radio frequency receiver [Link] • Neutrodyne receiver [Link] • Reflex receiver [Link] • ZN414 [Link] • Direct-convertion receiver [Link] • Regenerative receiver [Link] • Armstrong oscillator [Link] • Superheterodyne receiver [Link] • Edwin Howard Armstrong [Link] • Regency TR-1 [Link] • Sony TR-52 [Link] • Blogs • “ ” [Link] • [Link] • Radio Experimenter's Blog [Link] • Circuitsalad.com [Link] • Dave Richards AA7EE [Link] • YouTube Channels • W2AEW [Link] • Mr Carlson's Lab[Link] • EEVblog [Link] • Afrotechmods [Link] • RimstarOrg [Link]
  70. 70. The End Thanks for Listening

×