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Arts and Crafts
1 - 15 of 633 Total. Shared
Hi-VHF 8-El FD-YAGI - OPTimized
1. Hi-VHF 8-El FD-YAGI - OPTimized  (17 May 2015)
Hi-VHF 8-Element Folded Dipole Yagi analyzed using 4nec2 after determining "best" Dimensions
using nikiml's Python Optimization Scripts.

Hi-VHF Raw Gain = 8.9 to 11.4 to 10.2 dBi, F/B & F/R Ratio Min = 19.7 dB and SWR (300-ohms) Under 2.1
27 Visits
12 Images
Linked Album
holl_ands
Hi-VHF 10-El FD-YAGI - OPTimized
2. Hi-VHF 10-El FD-YAGI - OPTimized  (17 May 2015)
Hi-VHF 10-Element Folded Dipole Yagi analyzed using 4nec2 after determining "best" Dimensions
using nikiml's Python Optimization Scripts.
20 Visits
12 Images
Linked Album
holl_ands
3. uhf10elfdyagiopt  (17 May 2015)
UHF 10-Element Folded Dipole Yagi analyzed using 4nec2 after determining "best" Dimensions using nikiml's Python Optimization Scripts.
0 Visits
0 Images
Linked Album
holl_ands
Castaways 2015
4. Castaways 2015  (10 May 2015)
Now in its eighth year, the Castaways Sculpture Awards held on the Rockingham Foreshore, continues to convey the message of recycling to the public, through the use of these creative artworks.
24 Visits
56 Images
Linked Album
gladysclancy
UHF 13-El Twin-Boom LPDA - OPT
5. UHF 13-El Twin-Boom LPDA - OPT  (13 May 2015)
UHF 13-Element Twin-Boom (Layered) LPDA (Log Periodic Dipole Array) with Dimensions Optimized
for Highest Gain (i.e. Sigma = 0.18) using nikiml's Python Scripts.
Boom-Length = 36.7-inches.

UHF Raw Gain = 10.6 to 11.0 to 10.2 to 10.6 dBi, F/B & F/R Ratio Min = 25.0 dB and SWR (75-ohms) under 1.6.

Note that Max UHF Raw Gain occurs when Sigma = 0.213 (per Optimization) and 0.22 (per Parameter Study),
but Quasi-Optimum Sigma = 0.18 is nearly SAME Performance, with much shorter Length, as analyzed here.

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24 Visits
22 Images
Linked Album
holl_ands
Ch45-51 12-El FD-Yagi - OPTimized
6. Ch45-51 12-El FD-Yagi - OPTimized  (11 May 2015)
Ch45-51 12-Element Folded Dipole Yagi with Optimized Dimensions using nikiml's Python Scripts.  BoomLength = 48.3-in.
26 Visits
15 Images
Linked Album
holl_ands
Hi-VHF 22-El FD-Yagi - OPTimized
7. Hi-VHF 22-El FD-Yagi - OPTimized  (10 May 2015)
Hi-VHF 22-Element Folded Dipole Yagi with Optimized Dimensions determined using nikiml's Python Scripts.
Boom-Length = 217-in (about 18-ft).

Hi-VHF Raw Gain = 12.5 to 15.2 to 13.9 dBi, F/B & F/R Min = 24.0 dB and SWR (300-ohms) Under 2.2.
47 Visits
12 Images
Linked Album
holl_ands
Jewelry Organizer-Holder
8. Jewelry Organizer-Holder  (May 3, 2015)
127 Visits
22 Images
Linked Album
wildrainsphynx
Support the Troops
9. Support the Troops 
62 Visits
5 Images
Linked Album
fulks19
UHF 7-El Wedge & Layered LPDA
10. UHF 7-El Wedge & Layered LPDA  (27 Apr 2015)
UHF 7-Element Layered LPDA (Log Periodic Dipole Array with Top and Bottom Arrays parallel to each other)
was found after trying to Optimize the Wedge version (with Inclusive Angle = 2* HalfAngle) and finding that
it was essentially a Layered version...which was then partially Re-Optimized to find the "best" Separation
between the Top and Bottom set of LPDA Elements.  Python Optimization Scripts from nikiml were used
to find the "best" set of dimensions.

Two versions are analyzed here: a) 7-El Wedge LPDA and b) 7-El Layered LPDA, with ALL SAME Dimensions,
except for Separation between Top & Bottom sets of LPDA Elements.

a) 7-El Wedge LPDA:

UHF Raw Gain = 7.9 to 9.0 to 8.1 dBi, F/B & F/R Ratio Min = 22.5 dB and SWR (75-ohms) Under 1.8.

===============================================================
b) 7-El Layered LPDA:

UHF Raw Gain = 7.9 to 9.0 to 7.9 dBi, F/B & F/R Ratio Min = 21.0 dB and SWR (75-ohms) Under 1.9.
[NOTE: More accurate EVAL found only 0.1 dBi less Gain at 698 MHz, see EVAL RESULTS Files.]
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83 Visits
37 Images
Linked Album
holl_ands
The Beat
11. The Beat 
72 Visits
132 Images
Linked Album
hpdramaclub
Woodworking
12. Woodworking 
These are our woodworking projects, beginning in 2012. I'm having so much fun!
490 Visits
65 Images
Linked Album
lindyjo450
Cottesloe Sculpture By the Sea 2015
13. Cottesloe Sculpture By the Sea 2015  (March 2015)

The 11th annual Sculpture by the Sea was held on Cottesloe Beach in March 2015. This is the world's largest annual outdoor sculpture exhibition that is free to the public. With an estimated annual attendance of 215,000 people each year, this massively popular event captures the creativity of over 70 local, interstate and international artists every year, featuring all kinds of conversation-starting and thought-provoking sculptures. These images bring you some of the entries that I was able to capture in fleeting seconds between the crowds of admirers blocking the view.

454 Visits
74 Images
Linked Album
gladysclancy
/hu4baylooprlh410x14norefl
14. /hu4baylooprlh410x14norefl  (21 Mar 2015)
Hi-VHF + UHF 4-Bay (10.125 x 14) + Loop (RLH4) + No Reflector analyzed using 4nec2 after determining Dimensions using nikiml's Python Optimization Scripts.
264 Visits
21 Images
Linked Album
holl_ands
Murder rock/Brick Foam
15. Murder rock/Brick Foam 
207 Visits
3 Images
Linked Album
bloodandwhiskeydesign
 
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