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Recent content by salviador

  1. S

    iowa hills hilbert filter designer

    Hi, I can't find the "iowa hills hilbert filter designer" software. Does anyone know where I can download it? (the original site hasn't been working for a while) Thank you
  2. S

    RF preamp DCF77 practical approach

    twin-t-filter is notch filter, removes an unwanted frequency. How can be useful to select a specific frequency?
  3. S

    RF preamp DCF77 practical approach

    I have design my preamp for dcf77 (77500Hz), The maximum bandwidth I managed to get is 5.91Khz, not more :-( I use this schematic: what do you think? (with this inductor I can not do better)
  4. S

    RF preamp DCF77 practical approach

    Re: best inducer for77500Hz Hi, I chage the circuit with opamp: Is real this circuit ? with opamp I have high impedence
  5. S

    RF preamp DCF77 practical approach

    best inducer for77500Hz I would like to build a preamplifier for the frequency 77.5Khz (DCF77). The problem is having a Qload > 80, for have a bandwidth < 1Khz Q = 77500/1Khz = ~78 the type of circuit is this: For have high Rload I use dual gate mosfet, and Tapped Capacitor Matching for...
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