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Re: [softrock40] Re: Creative Sound Blaster LIVE ext USB & Rocky

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  • KD5NWA
    My circuit detects zero crossing, but I was not talking of crystal oscillators they don t need a wide range of frequency use.
    Message 1 of 21 , May 25, 2006
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      My circuit detects zero crossing, but I was not talking of crystal
      oscillators they don't need a wide range of frequency use.

      On Thu, 2006-05-25 at 16:36 -0700, FRANCIS CARCIA wrote:
      > This isn't an issue with a crystal oscillator since the loss is
      > gradual. I was thinking of an ALC loop but that is a bit complicated.
      > Limiter amps would be easier. I need to look at commerical parts and
      > see the loss specs. I have one that is 45 degress on each port as the
      > losses of each port cross (HP/LP) and the fourth port is down over 20
      > dB to the reference load. Now to BB it. Zero cross comparators would
      > also work.
      > then there is ecl flip flops....gfz
      >
      > KD5NWA <KD5NWA@...> wrote:
      > I have a thought about that, use a amplifier following the low
      > that uses
      > negative feedback to keep the amplitude constant.
      >
      > On Thu, 2006-05-25 at 13:01 -0700, FRANCIS CARCIA wrote:
      > > I've been playing with quad hybrids also and almost have a
      > good
      > > baseline. The quad I still need to play with it to control
      > losses over
      > > a wide frequency range. fc
      > >
      > > KD5NWA <KD5NWA@...> wrote:
      > > I just got home, I will post it by tomorrow. But a
      > word of
      > > caution, this
      > > is for playing around, using a comparator with
      > analog
      > > Quadrature clock
      > > signals is not the lowest phase noise system, but it
      > does let
      > > you tune
      > > all over the place.
      > >
      > > On Tue, 2006-05-23 at 15:44 +0000, Giancarlo wrote:
      > > > --- In softrock40@yahoogroups.com, cbayona
      > <KD5NWA@...>
      > > wrote:
      > > > >
      > > > > I played with a RC bridge a Low Pass on one
      > side a High
      > > Pass on
      > > > the
      > > > > other, it worked quite well over several bands
      > with out
      > > changing
      > > > > components, the signal difference would stay in
      > > Quadrature.
      > > > >
      > > > > I have a schematic in LTSpice that I will try
      > to post in
      > > a couple
      > > > of
      > > > > days, I ill e on the road, I believe an older
      > version is
      > > in my web
      > > > site.
      > > > > I'm at Dayton right now and I'm pretty busy.
      > > > >
      > > > > The circuit requires a additional transformer to
      > isolate
      > > the
      > > > signals, 2
      > > > > resistors, and 2 capacitors, then it goes to the
      > > comparators to
      > > > square
      > > > > up.
      > > > >
      > > > > Cecil
      > > > > KD5NWA
      > > > > www.qrpradio.com
      > > > >
      > > >
      > > > Hi Cecil,
      > > >
      > > > thanks a lot for info and waiting for you upload
      > > >
      > > > 73
      > > >
      > > > Gian
      > > > I7SWX
      > > >
      > > >
      > > >
      > > >
      > > >
      > > >
      > > >
      > > >
      > > > Yahoo! Groups Links
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