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Arts and Crafts
1 - 15 of 593 Total. Shared
Installation 11/2014
1. Installation 11/2014  (11/19/2014)
51 Visits
15 Images
Linked Album
sixtiestoyguy
UHF 2-Bay Hourglass-Loops - NO Refl
2. UHF 2-Bay Hourglass-Loops - NO Refl  (19 Nov 2014)
UHF 2-Bay Hourglass-Loops analyzed using 4nec2.

See analysis for Vertical Stacked Hourglass-Loops:
http://imageevent.com/holl_ands/stacked/verticallystackeduhf/vertstackuhfhourglassloopnorefl
46 Visits
42 Images
Linked Album
holl_ands
UHF 3-Bay Hourglass-Loops - NO Refl
3. UHF 3-Bay Hourglass-Loops - NO Refl  (19 Nov 2014)
UHF 3-Bay Hourglass-Loops (NO Reflector) analyzed using 4nec2.

Multiple versions were analyzed with different methods for Combining Antennas:

a) Three EX Statements, emulating a PERFECT 3-Way Combiner.



b) Two "Shortest Path" Feedlines, SAME size as Hourglass Center Wire.



c) Two "Shortest Path" Feedlines, DIFFERENT size as Hourglass Center Wire.

T.B.D.
38 Visits
69 Images
Linked Album
holl_ands
MCSQG  january
4. MCSQG  january  (11/18)
I seen a different way of doing the trapunto. It is easier and faster but you will not see the effect until it is quilted.
43 Visits
6 Images
Linked Album
puppys2852
HP Drama Club Ten Year Anniversary
5. HP Drama Club Ten Year Anniversary  (November 10, 2014)
132 Visits
135 Images
Linked Album
hpdramaclub
MCSQG February
6. MCSQG February   (11/1/14)
Block of the month for February
techniques appliqué, chenille (optional)
52 Visits
7 Images
Linked Album
puppys2852
Quilt show 2013
7. Quilt show 2013  (2013)
Bloomington quilt show
35 Visits
26 Images
Linked Album
puppys2852
UHF CM4221HD (Hacked) - No Reflector
8. UHF CM4221HD (Hacked) - No Reflector  (18 Oct 2013)
UHF CM4221HD (Hacked) and NO Reflector analyzed using 4nec2.

CM4221HD measurements per fol. smpowell55 posts:
http://www.digitalhome.ca/forum/showthread.php?p=863127
http://www.digitalhome.ca/forum/showthread.php?p=863559

UHF Raw Gain = 7.4 to 12.2 dBi and SWR (300-ohms) under 2.6.
Hi-VHF Raw Gain = 4.1 to 4.2 dBi and SWR (300-ohms) = 17 to 1.1.
SWR on Ch7-10 degrades Net Gain & EVM (Error Vector Magnitude), but may be adequate for strong stations.
NOTE: As-shipped PCB Balun KILLS VHF.  Above Hi-VHF performance presumes replace with
conventional Transformer (Cylindrical) Balun.

BowLength = 7.9-in, Inner-Inner Bowtie Spacing = 9.84-in, Outer-Inner Bowtie Spacing = 8.46-in,
Tine Separation = 3.94-in.  Feedline Separation = 1.18-in, with 0.8-in at Crossover (2" from Outer Bowtie).
16 Rod Reflectors: 23.6" Long with 1.93" Spacings for Total Height = 30-in.  Separation from Bowties = 4.25-in.

It is presumed that anyone interested enough to view this webpage will
implement the "Hacked Balun" modifications per photo in fol. rabbit73 post
(flip over the Feedlines going into the Balun plus an additional offset):
http://www.digitalhome.ca/forum/showthread.php?p=1167870
1182 Visits
21 Images
Linked Album
holl_ands
UHF 21El Curtain Array - NO Refl
9. UHF 21El Curtain Array - NO Refl  (20 Oct 2014)
UHF 21-Element Curtain Array (NO Reflector) analyzed using 4nec2 after RESCALING Wi-Fi version posted by Ross Anderson, W1HBQ.  Also corrected AGT=1.0 after fixing SOURCE Wire Statement error.
478 Visits
13 Images
Linked Album
holl_ands
horizstackff4dblanglerefl+HHH
10. horizstackff4dblanglerefl+HHH  (17 Oct 2014)
Horiz-Stack FF4 + DoubleAngleRefl + HHH
UHF+Hi-VHF HFF8, a Horizontal Stack of 2 ea Free-Form 4-Bays (FF4) with Double Angle Reflectors
(each 48" H x 36" W using 2x2-in Grid) and HHH (Hollands Horizontal Harness) were analyzed using 4nec2.
Essentially all Dimensions were determined using nikiml's Python Optimization Scripts.

Performance was slightly "Better" at THREE notable Stacking Distances:
34.821-inches (NO GAP, Continuous Reflector), 35-inches (Metal-to-Metal about 1/4-inch)
and 51-inches, which are analyzed below.
There were notable Stacking Distances further out, but none were particularly "Better".

Although the differences are only a few tenths of a dB, Stack Distance = 51-inches was just
a bit "Better", esp. Hi-VHF, than at 35-inches.  The wider Separation may also be slightly
"Better" at combating Multipath Fading due to the reduction in Statistical Correlation
between the two Antenna signals.  The "NO GAP between Reflector" alternative was slightly worse.

===========================================
a) Horizontal Stacking Distance (4-Bay Center-to-Center) = 34.821 inches (NO GAP between Reflectors).

T.B.D.

===========================================
b) Horizontal Stacking Distance (4-Bay Center-to-Center) = 35-inches (0.18-in GAP between Reflectors).



===========================================
c) Horizontal Stacking Distance (4-Bay Center-to-Center) = 51-inches (16.18-in GAP between Reflectors).
74 Visits
42 Images
Linked Album
holl_ands
Joanne's Cookies
11. Joanne's Cookies  (October 16, 2014)
55 Visits
22 Images
Linked Album
limafamily
12. UHF Batwing - No & 11RR  (16 Oct 2014)
UHF Batwing Antenna with No Reflector and 11 Reflector Rod Screen analyzed using 4nec2.  Based on 4nec2 files provided by user <300ohm>.
0 Visits
0 Images
Linked Album
holl_ands
UHF 4-Square Chireix Free Form
13. UHF 4-Square Chireix Free Form  (15 Oct 2014)
4-Square Chireix Free Form (Unequal Inner/Outer Lengths & Angles) Antenna with NO Reflector and 11 Reflector Rods analyzed using 4nec2.
505 Visits
27 Images
Linked Album
holl_ands
Displaying Copper Roses
14. Displaying Copper Roses   (October 2014)
My Copper Roses often are given as Wedding gifts,  7th Anniversary, Christmas, Valentine's Day, Mothers' Day, and Birthdays and as symbols of affection.
These patrons have sent me photos of my copper roses in situ.
http://www.joygibat.com/
6708 Visits
48 Images
Linked Album
joygibat
MCSQG
15. MCSQG   (10/1/14)
January BOM.
Theme:  calendar quilt
Techniques:  Applique, padded appliqué, hand or machine embroidery
364 Visits
16 Images
Linked Album
puppys2852
 
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