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  1. Whitebird001

    RF remote control for PC

    I'm not living in the UK but even if yes, the target range is so short it cannot disturb anyone. So I need to build a montage that takes the 1V peak to peak HF signal and by impedance conversion produce a higher amplitude signal. The input impedance of the system should be 100ohms, the output...
  2. Whitebird001

    RF remote control for PC

    macgyvers2000, of course if the only solution is to buy a 433MHz kit, I will do it, but first I would like to make this self-made transmitter work. VE1BLL, because of the relatively small amplitude of the carrier when it is ON, the radiated power if 100% efficiency is achieved will be only...
  3. Whitebird001

    RF remote control for PC

    Hi all, I'm building an RF remote control for a PC and have the following constraints: -The maximum frequency my scope is able to view is 50MHz, so it sets the maximum frequency of the carrier. In my case it is 43MHz. -The case is 8*10*3cm => the maximum size for the antenna is 10 cm (I...
  4. Whitebird001

    loss resistance of a small loop antenna

    Hi! What is the formula to calculate the loss resistance of a small loop antenna having a square shape?
  5. Whitebird001

    Feeding an antenna

    Hi all, I built a 29,5 MHz oscillator for RF carrier generation. When I connect a 5K resistor between ground and the output of the oscillator, amplitude is divided by 2. That means the output impedance is arround 5K. I also built a 10 cm long antenna made of copper wire. I will use this...

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