RX antenna - BOG

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rev.0.1 5/2019 by Jan OK2ZAW

Feeder BOX(Edit)

  • This box contains of transformer 450 Ohm to 50 or 75 Ohm and protections

  • Part list

PTC_F PTC 5mm piece 1 PTC 100mA
GL Neon lamp piece 1 neon lamp 100V
Tr Transformer piece 1 BN-73-6802

TRANSFORMERS winding - very important thing!(Edit)

    • for 50 ohm coax feed line : 2 turns on primar (coax) and 5 turns on secondar side (loop)
    • for 75 ohm coax feed line : 2 turns on primar (coax) and 4 turns on secondar side (loop)

- Transformer should have 4 + 1 turns. So you wind 4 turns and 1 more as a tap.

Common mode current choke(Edit)

  • Common mode current choke construction
  • Wind 4 turns on one side than cross to another side of cores and wind rest turns.

Terminator BOX(Edit)

  • This box contains of Load resistors for the antenna and protections

  • Part list

PTC_F PTC 5mm piece 1 PTC 100mA
GL Neon lamp piece 1 neon lamp 100V
R1 Resistor 2W piece 1 Ohm 750
R2 Resistor 2W piece 1 Ohm 330
R3 Resistor 2W piece 1 Ohm 470
R4 Resistor 2W piece 1 Ohm 560