Original Moonracker YG5-4. Original Moonracker design ... transforming from YU7EF. Finished antenna ... Yagi now at 11 meter heigth. 70.68. 70.5. 70.28. 69.83.
1/ Original Moonracker YG5-4 2/ YU7EF transformations 3/ SWR meas
F5DQK March 2007
1
Original Moonracker YG5-4 Measures at 70.2 MHz using Mmana simulator
Whole aspect
Dimensions
SWR
F/B ratio
F5DQK March 2007
2
Original Moonracker YG5-4 Original Moonracker design - Equal spacement between elements - Gamma Mach feed (serious problems with humidity and torque) - F/B ratio not optimised
Lboom =2.66m Weight = 3.2 Kg
Impossible !!! What’s dBb ??
F5DQK March 2007
Gain =7.83 dBd F/B=14 dB
3
Original Moonracker YG5-4 Gamma mach feeding
Gamma capacitor F5DQK March 2007
4
Original Moonracker YG5-4 Zoom on gamma mach feeding : too much distance !!
Difference between diameters 19,85 – 19,07 = 0.78 mm, that’s far too much !!
F5DQK March 2007
5
Original Moonracker YG5-4 Zoom on rear of feeding box
Silicon compound
Plastic cap F5DQK March 2007
6
Original Moonracker YG5-4 Zoom on front of the feeding box : All the water can enter here !! Shield contact NOT reliable in the time !
Metal screw WITHOUT dedicated nut part (very ugly) !!
Box front (UHF feeding) F5DQK March 2007
7
Original Moonracker YG5-4 Initial elements fixing on boom and adjusting
F5DQK March 2007
8
F5DQK March 2007
9
Moonracker YG5-4 transforming from YU7EF Measures at 70.2 MHz using Mmana simulator
Whole aspect
Dimensions
SWR
F/B ratio
F5DQK March 2007
10
Moonracker YG5-4 transforming from YU7EF Finished antenna - No more equal spacement between elements - Direct 50 Ohm feed
F5DQK March 2007
11
Moonracker YG5-4 transforming from YU7EF Construction of a brand new isolated dipole - Dipole substitution - New elements spacements
Gain =7.86 dBd F/B = 18 dB F5DQK March 2007
12
Moonracker YG5-4 transforming from YU7EF Dipole feeding details Lucoflex plate 300x100 h=4 mm
No rain can enter
Diam 12/10 mm N connector Plastic box 70x70 h=40 Dipole fixing parts F5DQK March 2007
13
Moonracker YG5-4 transforming from YU7EF 50 Ohm dipole ends
Split on length 30 mm
Diam 12
F5DQK March 2007
No rain coming from both ends
Diam 10
14
Moonracker YG5-4 : last improvements against rain Aluminium Scotch on all previous holes (here dipole and gamma feeding)
F5DQK March 2007
15
F5DQK March 2007
16
Moonracker YG5-4 measures
SWR with MFJ-269 analyser
2
1.5
1.2
1
1.2
1.5
1.5
Direct, mast at 3 meter heigth
69.5
69.5
70.18
70.5
70.8
70.95
70.95
+1 cm on all elements
69.25
69.25 69.83
70.28
70.5
70.68
70.68
Yagi now at 11 meter heigth
69.1
69.1
69.96
70.3
70.56
70.77
70.77
+2 cm on all elements coming
67.5
67.5
67.8
70.12
70.32
70.49
70.49
New meas after 3 weeks
66.49
67.45 68.01
70.21
70.46
70.69
71.02
F5DQK March 2007
17
Moonracker YG5-4 final dimensions
Elements
El spacement Real el dims (mm) (mm)
Simulated el dims (mm)
0
2198
2190
Dipole 4
430
2128
2116
D4a
675
2011
2000
D4b
1540
1986
1975
D4c
2588
1870
1860
Ref 4
Difference : about 10 mm
F5DQK March 2007
18
Moonracker YG5-4 : boomlength + 40 cm Initial dims
1st update
Gain = 7.77 dBd F/B = 13.73 dB
Gain = 7.86 dBd F/B = 16.68 dB
Elements at equal spacements Last updates Boomlength + 312 mm Gain = 8.35 dBd F/B = 22 dB
Jul 28, 1993 - This information is given as an indication. In the continual goal to improve our products, we reserve the right to make any modifications judged ...
G-2700SDX Antenna Rotator Instruction Manual .... the boom if the antenna is already installed). Then ... and the PRESET dial markings will no longer correspond ..... 02 2202655. PRESNY. ADJ-A. -WWA.. *70 kio. 22K TOK. &9 120. 23A1020.
The function of Siemens TWT-Power Supplies is closed the same, the differences ... Detailed descriptions see functional description, block- and circuit diagram ...
DC â~ 18 R 404 360 AFC 7 1.15 50 12. R 404 370 * TNC male 1.20 50 13 .... SM 9 âto-5 R 411 909 119 1.25 2.5 2 ... mo 6 i010 R 414 506 1.30 3 5. 10 i010 F1 ...
Changes supplement, contact your nearest Hewlett-. Packard office. 9. Description. 10. The HP 8484A Power Sensor is used for measuring the average power ...
This information is given as an indication. In the continual goal to improve our products, we reserve the right to make any modifications judged necessary.
Jun 7, 1996 - This information is given as an indication. In the continual goal to improve our products. we reserve the right to make any modifications judged ...
