[LCC] low band antenna experience

[Dan Edward Dba East edwards]

mark
sure. 1st you need the 'right' cores:
http://toroids.info/BN-73-202.php
at $0.50 each they are perfect. get TEN. his heat strippable wire is also nice.might as well order a few FT-240-31 cores too ( K9YC )...real handy...memorize "A ham's guide to RFI, ferrites, baluns, and audio interfacing" whichis now gospel...
then you wind the splitters ( google 'magic T' )...they also make good beveragematching transformers ( w8ji.com ) and flag / pennant / ewe trannies...
http://michaelgellis.tripod.com/magict.html
i like the very last one. ONE core. 7 turn primary, two 5 turn secondaries. doesntmatter if they are 180 degrees out of phase. truly, magic....tested on my miniVNA..WOW !!! super simple and effective. also handy for building switchable rx antennas...the cores saturate ( catch on fire ) at about 7 to 10 watts....
or, you can buy them from dxEngineering...
http://www.dxengineering.com/Parts.asp?ID=418&PLID=222&SecID=32&DeptID=12&PartNo=DXE-RSC-2
does that get you started? WAE is coming up...
73, w5xz

--- On Thu, 7/15/10, Mark, K5ER <k5er at arrl.net> wrote:

From: Mark, K5ER <k5er at arrl.net>
Subject: [LCC] low band antenna experience
To: dan.n.edwards at sbcglobal.net
Date: Thursday, July 15, 2010, 11:10 PM

Hi Dan,
    Thanks for the info, and the link to Lee's site. I was talking to a local on the repeater today, and realized something. Whether a K9AY, 4-square, or Beverage, I will have one signal coming in via coax. Since I am doing SO2R, I need it available to both radios. I guess I could use an A/B switch, but I am automating as much as possible, so would like to avoid that. I then remembered that you had some kind of isolation transformer @ Pat's last year, You said it was super easy to build, and it worked great down there. Would something like that be usable to split  the receive signal from one of Lee's units, or the K9AY, and feed both radios? If so, is there a name and possible a web site with a schematic or other info? Thanks a bunch.

73,
Mark

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