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Recent content by zxcsemaj

  1. Z

    Oscillator

    Is it possible to see the simplified circuit diagram as well? No idea how to start. 😅
  2. Z

    Oscillator

    The problem is I'm only a student 😅 I don't know how to modify it without the guidance of the expert in this field. This is for Thesis Capstone project. 1675786411 Okay thank you, I'll try to use 27MHz oscillator from DVD Player, I don't know how to make PLL. I don't have consultant in this...
  3. Z

    Oscillator

    I replace the three doublers present in the circuit with colpitts oscillator then connect it directly to RF Amp?
  4. Z

    Oscillator

    Good day, everyone! Is it possible to replace Crystal Oscillator with Colpitts Oscillator Circuit? I can't find the exact value of crystal oscillator which is 54.90625MHz in the TV Transmitter circuit (yellow picture) that's why I'm looking for alternative for crystal oscillator. Also, which is...
  5. Z

    Substitute for MV2112,MPS3866 and MRF559

    Thank you, Sir! 1673797198 Also, is it okay to replace mps3866 with 2n3866?
  6. Z

    Substitute for MV2112,MPS3866 and MRF559

    Thank you so much, Sir! Last question Sir, can I substitute MV2112 Varicap to BB139 Varicap?
  7. Z

    Substitute for MV2112,MPS3866 and MRF559

    Thank you so much, Sir! If I want to have a frequency of 600MHz (UHF) above, should I increase the oscillator or lower it?
  8. Z

    Substitute for MV2112,MPS3866 and MRF559

    This is the circuit I'm planning to build, since the last time I post they said that the circuit is too complicated to build that's why came up to this circuit of TV Transmitter but the problem is the components that is obsolete. Also, what is this crystal oscillator that has a value of...
  9. Z

    Substitute for MV2112,MPS3866 and MRF559

    Hi! Everyone, I'm planning to build a TV Transmitter and can't find the replacement part for this component, does anyone know the Substitute for MV2112, MPS3866 and MRF559? Can't find any substitute on google. Thanks in advance!
  10. Z

    Substitute for MV2112,MPS3866 and MRF559

    Hi! Everyone, I'm planning to build a TV Transmitter and can't find the replacement part for this component, does anyone know the Substitute for MV2112, MPS3866 and MRF559? Can't find any substitute on google. Thanks in advance!
  11. Z

    TV Transmitter

    I found it here Sir, this link. https://www.open-electronics.org/dtt-tv-transmitter/?fbclid=IwAR0lX3azEUnarq3CpPoOKUxHkDKpYx800wtumTZh-7VNzxKbEDMtmJe0Hp0
  12. Z

    TV Transmitter

    Thank you, Sir. How 'bout this one? I found on google it says that it is a DTT TV Transmitter do you think its working and need a programming/code to make it functionable? And also, what is the equivalent or replacement for TR391AV can't find on google. Thanks.
  13. Z

    TV Transmitter

    If ever I build this circuit successfully it's still can't receive in tv?
  14. Z

    TV Transmitter

    I think its ISDB-T standard here in the Philippines.
  15. Z

    TV Transmitter

    Thank you, Sir! Is it possible if I use digital to analog converter? Can't find a basic low power circuit for audio and video digital tv transmitter on google. Do you have suggestions or recommendations in the circuit?
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