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Interesting Antenna StuffInteresting Antenna Stuff
Ray Sokola K9RS
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Just some stuff to think aboutJust some stuff to think about
• G0KSC LFA,OWL etc
• 4 - 40 meter antennas in phase
• N6BT new stuff
• C3S Moxon by K9RS
• HEX
• FG-01 a nice present!
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G0KSCG0KSChttp://www.g0ksc.co.uk/
OWA Optimized Wideband Array
OWL Optimized Wideband Low impedance
LFA Loop Fed Array
OP-DES Opposing Phase Driven Element System
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G0KSC Loop Fed Antenna
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2 EL 10M LFA between 2 5 EL 6M LFA’s
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The OP-DES Yagi
Opposing Phase Driven Element System Reduces side lobes and helps provide a much wider band antenna with constant performance
characteristics
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2 element 28MHz OP-DES Yagi
another development of Justin Johnson, G0KSC
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Available from http://store.rlham.com
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40 M stacks
The bottom antenna
can be pretty lowcan be pretty low, in
fact lower than most people think
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A nice system for 40M @NN1N
“…spaced 2 of my Rohn 45s 100 feet apart broadside to about 60 degrees az. Put 402CDs at about 100/50 on each tower. Good for about 12.25 db on signals at 22 degrees elevation. It is showing that gain pretty consistently. Usually EU sigs are about 5 to 10 db above the 2 el rotatable (much higher on another tower on top of the hill) by itself…”
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Whatever happened to Whatever happened to
Tom Schiller, N6BT,Tom Schiller, N6BT,
from Force 12 ?from Force 12 ?
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Founder of Force12
Team Vertical
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This is a
Must Read !
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N6BT makes the best antennas; others make comparisons.
• New 5-band Yagi and Rotary dipole for HF • Bravo Series Vertical Dipoles for HF • Bravo Series 5 & 7 band for fixed, portable,
expedition • Bravo Series single band and 2-element
SBVAarrays • 160 DXpedition vertical used to set QRP and LP
Records• 3 element 20 and 2 element 40
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Q52 Relay-switched 20-17-15-12-10 meter Yagi
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Q52
5-band Remote Switched 2el Yagi
20-17-15-12-10 meters
3' sections, Integrated Balun
16' long elements, 9' boom, 9' rotating radius
<2sqft windload, 17 pounds, KW
Minimum 85% efficient
100 mph survival
Gain: >3.2dBd all bands, min 8-10dB F/B all bands
Intro price of only $549
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20 meter 2 element Bravo mounted at 6' with remote switching on the parasitic element to
change direction
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K9RS C3S Moxon
• What do you do when the movers bend the ends of your 20M elements to fit in the moving van?
• You make it into a pseudo moxon
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I use a C3S with the 20 meter elements shortened
by folding in using wireand nylon line
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Hex Beams
They work pretty well
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DX Engineering HEXX
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JY7P
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HEX
This is what it
Looks like if the
Center post
Breaks!
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For Hex beams the centerSupport is critical
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The original with two ‘W’ shapped elements
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New style HEX with ‘U’ shaped reflector
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http://hizantennas.com
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Hi-Z 4-8PRO Eight Element Tri-Band Array System
I'm sitting here listening to TX7M on 1831.7. Conditions are not good this morning and he's peaking about S5/S6 on the TX four square but takes long, deep fades down to S0, occasionally not even copyable. Other than an occasional static crash of S7, my S meter on the FT1000MP is sitting on S0. . .no bars even lit. The TX7 will fade down to where I can just barely tell he's there on the TX four square. When I switch to the 8 circle he's Q5 copy with an S4 meter reading! So not only does the 8 circle hearing him with a better SNR, but it's actually hearing him with greater absolute signal strength. It's totally amazing. I sit here and keep switching back and forth between the TX and RX arrays, thinking I'm doing something wrong or overlooking something. Now I know the TX four square hears very, very well. But the degree that the 8 circle is hearing better, both SNR and absolute signal level, is phenomenal. It's enough to make me almost think maybe I need to check out the TX four square when it gets to be daylight. You have absolutely hit the mark with the Plus6 amp. 73. . . Dave W0FLS
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Hi-Z 4-8PRO Eight Element Tri-Band Array System
The 4-8PRO can be scaled to fit in a smaller footprint for more space restricted locations with only a very minimal decrease in 160 meter performance. The smallest area that can be accomplished is a 42.5 foot radius or 85 foot diameter circle.
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RDF
RDF is the difference between the maximum forward gain in the direction of interest and the average gain in all directions of an antenna.
http://www.k7tjr.com/rx1comparison.htm
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FG-01 Antenna Analyzer
TEN-TEC is proud to announce that we are the exclusive distributor in the US for YouKits brand products.
$249
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FG-01 specs Power consumption: About 400 mA
Frequency Range: 1-60 MHzOutput: 15 dbmCenter Frequency Step: 1K, 10K, 100K, 1MHz
Scan Width of Display: 10K, 20K, 50K, 100K, 200K, 500K, 1M, 2M, 5M, 10M, 20M, 50M
Operating Power: 10-12.8VDC @500 maDimensions: 3.8" X 2.3" X 1.5"Weight: 13.5 oz with battery
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Comet CAA-500
• CAA-500 Commercial Grade SWR/Impedance Analyzer
• Range: 1.8 - 500MHz (including 222MHz band)
• $439.00 @ CheapHam.com
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Starting at $1139
33 ft Inflatable Tower for Amateur Radio
http://www.ltaprojects.com/
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• http://www.youtube.com/watch?feature=player_embedded&v=6yP5ZzTbZf8
• http://www.youtube.com/watch?v=alsUtjxKIOQ&feature=related