Topband: Solution: FCP + Inverted L, bend supported by "shorter" towers.

2012-10-11 Thread Guy Olinger K2AV
A big thank you to Frank, VO1HP, St. Johns, Newfoundland, whose successful version of the L + FCP + short tower is the genesis for this method. FCP refers to the 5/16 wave single wire folded counterpoise for low bands, described at http://www.w0uce.net/K2AVantennas.html At some point an illustrat

Re: Topband: XX9 Macao dxpedition

2012-10-11 Thread James Rodenkirch
OK - found the info at this url: http://adxg.org/macau/plans.php 72, Jim R. K9JWV From: rodenkirch_...@msn.com To: topband@contesting.com Subject: XX9 Macao dxpedition Date: Thu, 11 Oct 2012 16:32:51 -0600 I see a mention, in the latest ARRL DX news, of an upcoming dxpetition to XX9 land

Re: Topband: 1810 spur status and resolution

2012-10-11 Thread Roger D Johnson
It seems to be back. Or perhaps it's another one. On 1813 now. 73, Roger -- Remember the Liberty (AGTR-5) http://www.usslibertyveterans.org/ http://www.gtr5.com/ ___ Remember the PreStew coming on October 20th. http://www.kkn.net/stew for more info

Re: Topband: Near Field/Far Field

2012-10-11 Thread Guy Olinger K2AV
Perhaps a better definition of far field is the point of increasing distance where the shape of a pattern calculated by a near field process quits changing at angles and azimuths of concern. Let's test this idea using the NEC4 near field table generator. We will not change processes, using the n

Topband: K9AY - question

2012-10-11 Thread Eduardo Araujo
Hi everybody, I would like to try K9AY antenna for this CQWW mainly for 160 but after the contest I hope it to be usefull for 160 and 80. Q1: would it be possible to use a tree as a central support without affecting its performance? or would it be better to hang a rope between 2 trees and hang

Topband: Helpful article on ferrites

2012-10-11 Thread Brian Machesney
Since ferrites are discussed so often on the forum, I thought this article in High Frequency Electronics (edited by K9AY!) might be interesting: http://www.highfrequencyelectronics.com/Archives/Jun11/HFE0611_Hamilton.pdf Lots of good information on ferrite "hows" and "whys." 73 -- Brian K1LI ___

Re: Topband: Near Field/Far Field

2012-10-11 Thread Tom W8JI
According to antenna engineering textbooks (Kraus, Balanis. Johnson & Jasik etc), the free space, far-field radiation pattern is not a function of the distance from the radiator, as it is in the near field. The near-field/far-field boundary conventionally is defined as equal to 2L^2/lambda, wh

Re: Topband: jt65 qso

2012-10-11 Thread Jim Brown
On 10/10/2012 9:29 AM, David Michael Gaytko // WD4KPD wrote: Would like to hear from you if you can shed some light on this. Near San Francisco, I see JT65 activity fairly often from VK and the east coast, and on the very best nights the east coast guys can work the VKs. It's a fairly narrow