Samir, this reflector is intended for questions on antenna *modeling*, not
antennas, tuners, etc. A much better site for that is
towertalk@contesting.com. For 160 in particular, try topband@contesting.com.
73, Pete
At 12:41 PM 11/13/2008, Samir Popaja, 7S7V \(SM7VZX\) wrote:
>Mike, please I need your advice:
>
>CG-3000; http://www.arraysolutions.com/Products/cg_3000.htm
>
>MFJ-974HB; http://www.mfjenterprises.com/Product.php?productid=MFJ-974HB
>
>
>Hello,
>
>I need to solve my problem on low bands; 160, 80 and 40m with one antenna.
>
>These are my possible solutions (which is better according to you antenna/
>tuner knowledgeable people).
>
>The antenna will be used primary for contest.
>
>1. Inverted L (15m + 25m) with radials, feeding with coaxial cable and
>CG-3000 in feedpoint
>
>2. Dipole (2 x 20m), via 450 ohm open line and MFJ-974HB, on 160m the
>antenna will be used like T vertical and ground (@20m)
>
>3. Dipole (2 x 40m), via 450 ohm open line and MFJ-974HB (@20m)
>
>4. Inverted L (15m + 25m) with radials, via 450 ohm open line and MFJ-974HB
>
>5. Battle Creek Special (on SPIDERBEAM 18m pole) with
>(http://www.unadilla.com/traps.htm) traps for 80 and 40m
>
>*What's the behave of solution 2. and 3. against halfwave dipole feed via
>50ohm coax on 40 respective 80m with same height, @20m?
>*The MFJ unit has 4 x 250pF, is it enough for low bands?
>*Do you know how big is the losses with this kind of TUNER
>(CG-3000) which has small capatitors and coils versus MFJ-974HB with little
>bigger C and L?
>
>I got some info about AT-502-Tuner by Hamware, www.hamware.de but it seems
>little bit expensive...
>
>Thank You for all answers/ suggestions.
>
>SM7VZX
>
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