Post on 30-Dec-2015
transcript
Interesting Antenna StuffInteresting Antenna Stuff
Ray Sokola K9RS
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!
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
G0KSC Loop Fed Antenna
2 EL 10M LFA between 2 5 EL 6M LFA’s
The OP-DES Yagi
Opposing Phase Driven Element System Reduces side lobes and helps provide a much wider band antenna with constant performance
characteristics
2 element 28MHz OP-DES Yagi
another development of Justin Johnson, G0KSC
Available from http://store.rlham.com
40 M stacks
The bottom antenna
can be pretty lowcan be pretty low, in
fact lower than most people think
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…”
Whatever happened to Whatever happened to
Tom Schiller, N6BT,Tom Schiller, N6BT,
from Force 12 ?from Force 12 ?
Founder of Force12
Team Vertical
This is a
Must Read !
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
Q52 Relay-switched 20-17-15-12-10 meter Yagi
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
20 meter 2 element Bravo mounted at 6' with remote switching on the parasitic element to
change direction
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
I use a C3S with the 20 meter elements shortened
by folding in using wireand nylon line
Hex Beams
They work pretty well
DX Engineering HEXX
JY7P
HEX
This is what it
Looks like if the
Center post
Breaks!
For Hex beams the centerSupport is critical
The original with two ‘W’ shapped elements
New style HEX with ‘U’ shaped reflector
http://hizantennas.com
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
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.
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
FG-01 Antenna Analyzer
TEN-TEC is proud to announce that we are the exclusive distributor in the US for YouKits brand products.
$249
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
Comet CAA-500
• CAA-500 Commercial Grade SWR/Impedance Analyzer
• Range: 1.8 - 500MHz (including 222MHz band)
• $439.00 @ CheapHam.com
Starting at $1139
33 ft Inflatable Tower for Amateur Radio
http://www.ltaprojects.com/
• http://www.youtube.com/watch?feature=player_embedded&v=6yP5ZzTbZf8
• http://www.youtube.com/watch?v=alsUtjxKIOQ&feature=related