OH1TV OH1O OH1WX OH6VC

Here are some of my AR projects

  1. 1. Split band speech processor 1976
  2. 2. Vintage keyer jpg 2005
  3. 3. CMOS keyers htm 2007, 2009
  4. 4. Speech processor for AM TX htm 2007
  5. 5. QRP SSB transceiver for 80m, 2007
  6. 6. Mixers Excel 2007
  7. 7. QRP attenuator htm 2007
  8. 8. Split band speech processor 2007
  9. 9. Moxon antenna for 50 MHz pdf 2008
  10. 10. ICOM 756 noise reduction 2008
  11. 11. LSB transceiver for 3699kHz, 2008
  12. 12. 1 volt keyers htm 2008
  13. 13. Analog keyers htm 2008
  14. 14. Capacitive touch paddle 2008, 2010
  15. 15. 3-band Cubical Quad pdf 2008
  16. 16. QRP transmitter 30m class D 2009
  17. 17. Opposite voltage fed array pdf 2009
  18. 18. Polyphase networks htm 2009
  19. 19. Playing with white LEDs htm 2009
  20. 20. 1 volt transceiver for 80m CW 2009
  21. 21. Single FET transmitter 4W 80m, 2009
  22. 22. dB and S-unit conversions 2009 2021
  23. 23. Minimal 1 QRP-TX 1W 20m htm 2009
  24. 24. Ideal mixers, gain and impedance 2009
  25. 25. Transmission line calculator 2010 2021
  26. 26. Optimal TOA & MUF-calculator 2012 2021
  27. 27. Opposite voltage fed array for 6m pdf 2010
  28. 28. 2-el vertical array for 80m pdf 2010
  29. 29. 50MHz pre-amplifier for K3 2010
  30. 30. Full band dipole for 80m htm 2010
  31. 31. Micro beacon " Froggie" for 80m 2010
  32. 32. Remote control of K3 station pdf 2010
  33. 33. 40m OVF stack at OH1NX pdf 2011
  34. 34. Opposite-voltage fed 2-el Quad pdf 2011
  35. 35. CCF Antenna simulations 1 pdf 2011
  36. 36. CCF Antenna simulations 2 pdf 2011
  37. 37. Remote control of FTdx5000 pdf 2019
  38. 38.Class-D AM-transmitter htm 2011
  39. 39. Inductance of a straight wire 2011 2021
  40. 40. OVF 2-el phased vertical for 40m pdf 2011
  41. 41. Ferrites for current baluns htm 2011
  42. 42. Direct conversion receiver 20m CW 2012
  43. 43. Why baluns, CCF & OHDXF pdf 2012
  44. 44. No rotator #-antenna, OHDXF pdf 2012
  45. 45. Local QSO's on 40m and 80m bands 2012
  46. 46. 50MHz openings and ionograms 2012
  47. 47. Optimal antenna height htm 2012
  48. 48. VK9XM operation in October 2012
  49. 49. 2-el 10-17m DX-pedition yagi pdf 2013
  50. 50. 3-el 50MHz DX-pedition yagi pdf 2013
  51. 51. What is amateur radio? pdf 2014
  52. 52. DDS control with Picaxe 2014
  53. 53. Rotorcard control with Picaxe 2014
  54. 54. Memory keyer with Picaxe 2014
  55. 55. 40m OVF stack at OH2BH pdf 2014
  56. 56. 6m portable 3-el yagi pdf 2015
  57. 57. CAT-line generated noise pdf 2015
  58. 58. AA-peli novice TX kit from 1978
  59. 59. 3-el Yagi for 2m band pdf 2019
  60. 60. 5...11-el Yagis for 2m band pdf 2015
  61. 61. Voltage balun analysis pdf 2015
  62. 62. Vertical Dipole Array pdf 2016
  63. 62s. Arreglo de dipolos verticales CE1TBN pdf
  64. 63. Ham calculator Excel 2016
  65. 64. 40m OVF array at OH1MA pdf 2016
  66. 65. GP or dipole for limited space pdf 2017
  67. 66. Low band RX-antennas CTU pdf 2017
  68. 67. OVF Tri-bander 20m,17m,15m pdf 2017
  69. 68. Low band noise calculator 2018 2021
  70. 69. LoTW activity analysis pdf 2018
  71. 70. 5-el PT-Yagi for 20m at OH1AJ pdf 2018
  72. 71. Antenna relay 1:4 HF+6m pdf 2019
  73. 72. 30m OVF array at OH1AJ pdf 2019
  74. 73. External noise measurement Excel 2020
  75. 74. Basic calculations in Electronics 2021
  76. 75. OVF Dualbander 12m/10m pdf 2021
  77. 76. Splitters for tri-bander stacking pdf 2022

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Pekka Ketonen. Updated 20.5.2022