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Re: Daughterboard won't oscillate on 40.5MHz (solved)

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  • Dave
    ... I wound 13 turns (unsquished) on another T25-6 core I had in stock and measured it at 0.54uH. With the supply now at 11.4V, 40.50 now has output of 2.3V
    Message 1 of 4 , Sep 2, 2007
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      > L100 has the correct number of 12 turns (12 passes through the
      > toroid). Unsquished it measured 0.47uH and squished it measures
      > 0.51uH (both a bit higher than the schematic-stated 0.43uH).
      > Perhaps I will try changing from 12 to 13 turns which should give
      > me about 0.55uH measured unsquished, but I suppose that might kill
      > the 56.2 oscillation.

      I wound 13 turns (unsquished) on another T25-6 core I had in stock
      and measured it at 0.54uH. With the supply now at 11.4V, 40.50 now
      has output of 2.3V p-p (and comes up to that almost immediately) and
      56.2 has 2.2V p-p, so I think I'll call it ready to install.

      Thanks for the help.

      Dave, WA3OFF
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