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Re: RXTX 6.3 160 meter core winding

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  • k6acj
    Thanks for the 160 core info. I ve built and used all the other modules with good success and didn t want to find out I was in trouble here. So, after
    Message 1 of 5 , Nov 30, 2009
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      Thanks for the 160 core info. I've built and used all the other modules with good success and didn't want to find out I was in trouble here. So, after building 3 HFProject amps and the SoftRock RXTX 160-10 modules, I'm about done winding cores for a while. ..... :o))

      bill k6acj



      --- In softrock40@yahoogroups.com, "g3oth" <g3oth@...> wrote:
      >
      > Well said Robby, much more detail in your message than in my reply.
      > Only thing that might still be misconstrued.
      >
      > "David WW2R has reported that he had to adjust the number of windings on L100-1 (the 66 turn coil on the 160m band) because of the fact that the toroid was not able to accept 66 turns as a single layer, without winding BACK over some of the existing winding."
      >
      > For those still in any doubt BACK is used here to mean BACK in time, not in REVERSE direction.
      >
      > 73 de Charles G3OTH
      >
      > --- In softrock40@yahoogroups.com, "R R Robson" <rrrobson@> wrote:
      > >
      > > From the Builders' Notes
      > > Winding Inductors
      > > To learn how to wind coils and transformers, please read the tips from the experts and then view the excellent videos on KC0WOXs Website to solidify your understanding of the task.
      > >
      > > Concernimg the number of turns in the windings, David WW2R has reported that he had to adjust the number of windings on L100-1 (the 66 turn coil on the 160m band) because of the fact that the toroid was not able to accept 66 turns as a single layer, without winding back over some of the existing winding. Overlapping turns caused him to need 69 turns to reach the required inductance of 18.7 uH.
      > >
      > > Pete N4ZR pointed out: "The 160-meter L100 requires 66 turns, but only about 40-45 turns will fit on the core in a single layer. You need to keep winding in the same direction in a second layer until you complete the 66-69 turns. I wound 69 originally, but on checking with my MFJ-259, which may not be very accurate the inductance appeared to be a little high.
      > >
      > > ----- Original Message -----
      > > From: k6acj
      > > To: softrock40@yahoogroups.com
      > > Sent: Monday, November 30, 2009 11:30 AM
      > > Subject: [softrock40] RXTX 6.3 160 meter core winding
      > >
      > >
      > >
      > >
      > > Regarding RX BPF 160 meter L100, what is the best way to wind 66 turns onto this core?? The core is full at 40 turns, do I just reverse direction for the remaining 26 turns or do I jump back to the center of the core and continue to wind in the same direction ??
      > >
      > > Any other 160 meter coil winding hints??? This is a challange ... Bill k6acj
      > >
      > > "[___] L100-1 18.7 uH T30-2 (red) #30 BPF 160: 66 turns #30 (34") (may need overwinding) BPF-1"
      > >
      >
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