PCBWay 3rd PCB Design Contest
VOTE NOW!
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
Design 1/4
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
Usability 2/4
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
Creativity 3/4
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
Content 4/4

basically this series adopts BITX20. there are some changes such as a Band pass filter that can be selected by giving a 5 volt voltage to the BPF you want to activate. VFO in this design, replaced with input from multiband DDS. and the addition of AGC. For the rest, it's all the same as BITX20.

capacitor and inductor values ??for each band:

80M
L1 = L2 = 2.2uH
L3 = 4.7uH
C1 = C2 = 1.5nF
C3 = 680pF

40M
L1 = L2 = 1uH
L3 = 2.2uH
C1 = C2 = 820pF
C3 = 390pF

20M / 30M
L1 = L2 = 0.47uH
L3 = 1uH
C1 = C2 = 390pF
C3 = 180pF

15M / 17M / 10M
L1 = L2 = 0.33uH
L3 = 0.68uH
C1 = C2 = 180pF
C3 = 82pF



Feb 24,2020
225 viewsReport item
  • Comments(1)
  • Likes(2)
You can only upload 1 files in total. Each file cannot exceed 2MB. Supports JPG, JPEG, GIF, PNG, BMP
    View More
    VOTING 2 votes
    • Riswan from
      jusy hobbiest
      • 10
        design
      • 10
        usability
      • 10
        creativity
      • 10
        content
      10.00
    • Engineer from ROMANIA
      • 9
        design
      • 9
        usability
      • 10
        creativity
      • 8
        content
      9.00
    View More