Transcript Interesting Antenna Stuff by Ray Sokola, K9RS

Interesting Antenna Stuff
Ray Sokola K9RS
Just 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!
G0KSC
http://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 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
Tom Schiller, N6BT,
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 wire
and 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 center
Support 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 TriBand 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
$249
TEN-TEC is proud to announce that we are the exclusive
distributor in the US for YouKits brand products.
FG-01 specs
Power consumption: About 400 mA
Frequency Range: 1-60 MHz
Output: 15 dbm
Center 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 ma
Dimensions: 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
33 ft Inflatable Tower for Amateur Radio
Starting at $1139
http://www.ltaprojects.com/
• http://www.youtube.com/watch?feature=pl
ayer_embedded&v=6yP5ZzTbZf8
• http://www.youtube.com/watch?v=alsUtjxK
IOQ&feature=related