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4127Re: [loopantennas] Balanced Antenna Amplifiers

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  • Steve Ratzlaff
    Oct 1, 2007
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      Hi Chris,
      Perhaps Lyle Koehler K0LR's webpage is the one. Scroll down to "Balanced
      Loop Preamp" for one circuit similar to your description.
      http://www.mlecmn.net/~lyle/
      Steve
      ----- Original Message -----
      From: "Chris Trask" <christrask@...>
      To: "Loop Antennas" <loopantennas@yahoogroups.com>
      Sent: Monday, October 01, 2007 8:28 AM
      Subject: [loopantennas] Balanced Antenna Amplifiers


      > About a year ago we had a lengthy discussion about active antenna
      > amplifiers, and someone posted a URL for a balanced amplifier that had a
      > pair of JFETs followed by a pair of NPNs. I think it had four varactors
      > for
      > tuning. I remember having made a comment about adding a transformer
      > between
      > the JFETs and the NPNs to improve the gain and the even-order distortion.
      > Somehow, I mananged to misplace that schematic and would like to ask if
      > the
      > person who earlier made that avialable would do so again.
      >
      > Chris
      >
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