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Re: [softrock40] Re: Winding the 10 metre BPF for the Softrock V6.3 and V8.3.

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  • Loftur J√≥nasson
    Philip, I think I noticed you saying that you are using Winrad. I don t really know about Winrad, but in case of Rocky or PowerSDR you should be seeing more
    Message 1 of 4 , Mar 29, 2009
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      Philip,

      I think I noticed you saying that you are using Winrad. I don't
      really know about Winrad, but in case of Rocky or PowerSDR you should
      be seeing more than 60dB of suppression, with or without the 9V1AL
      MoBo.

      73 de Loftur, ve/tf3lj

      2009/3/29 g7jur <philip.g7jur@...>:
      > --- In softrock40@yahoogroups.com, "Alan" <alan4alan@...> wrote:
      > Hi Alan.
      > I did wind the coil as instructed, but I an using Alexs motherboard.
      > This introduces an offset and takes the balance form 20 dB down to 10 dB.
      > Moving the windings about on the can make things better.
      > Philip g7jur.
      >
      >
      >
      >>
      >>
      >> ----- Original Message -----
      >> From: "g7jur"
      >>
      >> >I have found that the you wind the transformer T100 on the 10 metre
      >> > BFP is very critical at 28 Mhz.
      >> > Does anyone know the best way to wind it to produce the best balance of
      >> > the I/Q
      >> > output.
      >>
      >> I presume everybody does what Tony says and winds both over the whole of
      >> the
      >> ring, secondary over the primary.
      >>
      >> Use Rocky, or the auto adjust PSDR to check for balance, it is much
      >> quicker
      >> and easier than fiddling with sliders.
      >>
      >> If you cannot balance with the coil plugged into the Softrock then look
      >> for
      >> a fault. I don't know about the motherboard but no-one has had trouble
      >> with
      >> the basic Softrock other than wiring the transformer incorrectly.
      >>
      >> 73 Alan G4ZFQ
      >>
      >
      >
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