Here are some of my AR projects

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