[TenTec] cone Antenna PHOTO of how to wind them

[Robert & Linda McGraw K4TAX]

Works great for the VK's trying to work the USA.  From the VK signal source
the signal is not out of phase.

Kinda like the water spiraling down the drain in one direction north of the
Equator while doing so in reverse south of the Equator.


73
Bob K4TAX

----- Original Message -----
From: "Mike Hyder -N4NT-" <N4NT@chartertn.net>
To: "Stuart Rohre" <rohre@arlut.utexas.edu>; <qrp-l@Lehigh.EDU>;
<AQRP@yahoogroups.com>; <k5gp@texas.net>; <tentec@contesting.com>
Sent: Tuesday, April 16, 2002 6:04 PM
Subject: Re: [TenTec] cone Antenna PHOTO of how to wind them


> Yeah, put the small end down -- otherwise your signal will be 180
> degrees out of phase.  If this is necessary, you can talk into the back
> of your microphone OR the other station can listen to the back of his
> speaker but not both.  WIOU wrote about similar problems with phase in
> his article in the April 1957 QST about using a ferrite loopstick
> antenna 1/4 wavelength underground.
>
> Mike
>
> ----- Original Message -----
> From: "Stuart Rohre" <rohre@arlut.utexas.edu>
> To: <qrp-l@Lehigh.EDU>; <AQRP@yahoogroups.com>; <k5gp@texas.net>;
> <tentec@contesting.com>
> Sent: Tuesday, April 16, 2002 6:55 PM
> Subject: [TenTec] cone Antenna PHOTO of how to wind them
>
>
> | Hi Folks,
> | Thanks to Steve Weber for his prototype photo of the folded conical
> helical
> | antenna  on the link below:
> |
> | This is with the one monopole mounted, and ready for more to be wound.
> I
> | really appreciate his doing this intermediate version, as the four
> monopole
> | version gets the turns so close together, a picture does not show
> clearly
> | what is going on. It is not too clear with the insulation on the wires
> and
> | same color; but the wire toward the slant edge is the no. 10 here, and
> the
> | wire toward the central axis in each turn, is the no. 12.  At the
> bottom,
> | the no. 10 goes to coax shield, the no. 12 to coax center lead.
> |
> | A few notes about this pair of pictures.  The Cone will not normally
> be used
> | in this configuration, it MUST be over a radial plane or ground plane
> screen
> | at least 6 feet square to work properly.  The wide end of cone must be
> up
> | and small end closer to ground.
> |
> | The Monopoles must start witht the short, (fold) at the wide end.
> This wide
> | end is 16 inches diameter for either 10m model or a 20m model.  The
> vertical
> | axis where the coil supports join should be 13 inches high.
> | The slant length of the supports over which you drill holes should be
> 12
> | inches long first turn to last.
> |
> | The end of the monopole at the narrow part of cone must go to coax
> without a
> | balun, and the coax connections must go straight off the narrow end of
> cone
> | and through the ground screen before making a right angle turn as
> shown
> | here.
> |
> | Remember the wide end is parallel to ground, and ground plane.  Notice
> the
> | holes predrilled in between turns for the second monopole to be
> threaded.
> | In a similar manner, for optimum performance and match to 50 ohms, you
> | should have one turn pair of the first monopole, then allow 3 pairs of
> holes
> | for the other monopoles.  Thus, when all are threaded, you have a pair
> | terminated at the top of the cone wide part, and then wind the next
> pair
> | starting 90 degrees from the first start, and so on, so each
> succeeding pair
> | is below the pair above,  pair 1, 2, 3, 4.  Since they start 90
> degrees
> | apart around the wide part, they should end 90 degrees apart around
> the
> | narrow end, but you are going to solder all the no. 12's to coax
> center
> | lead, and solder all no. 10's to coax shield and ground screen, (or
> | radials).
> |
> | Now that you have a picture, if you have any questions, please write:
> | <k5kvh@arrl.net>
> |
> |  http://www.qsl.net/kd1jv/cone.HTM
> |
> |
> |
>
>
> ------------------------------------------------------------------------
> --------
>
>
> |
> | _______________________________________________
> | TenTec mailing list
> | TenTec@contesting.com
> | http://lists.contesting.com/mailman/listinfo/tentec
> |
>
> _______________________________________________
> TenTec mailing list
> TenTec@contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
>