HI-QUALITY ANTENNAS MADE IN ITALY
ID285
MOUNTING INSTRUCTIONS
3mm Hex. key
Hex.
socket set
screws
Element Mounting
L2
L3
A
B
C
A
ATTENTION!
Place the Gamma
Match on upper side for
vertical polarization
L4
Direction for tuning
1) Choose your working frequency.
2) Cut both tubes
A
at
L1
(PVC cap must not be mounted).
3) Assemble both tubes
A
and place element
B
at
L2
.
4) Place element
C
of the gamma match at
L3
.
- working frequency
87...123 MHz
: proceed at point 5).
- working frequency
123...194 MHz
: cut element
C
85mm
from the side of PVC cap
5) You can proceed by mounting your antenna on the mast in
vertical or horizontal position.
-
Vertical
polarization: place your antenna at distance
L4
from the mast to get the best performance
-
Horizontal
polarization: distance
L4
is not required
Note:
It is recommended to use the above table just as a gui-
de. For fine-tuning please use an SWR-Meter.
85mm
C
L1
Freq.
L1
L2
L3
L4
(MHz)
(mm)
(mm)
(mm)
(mm)
87
770
249
19
860
93
726
242
30
810
98
690
233
42
771
103
664
226
51
742
108
634
220
58
716
113
615
214
65
689
118
582
210
73
650
123
550
205
81
610
123
550
179
102
610
130
510
171
113
576
138
470
163
125
541
146
438
156
135
508
154
413
146
146
483
162
390
136
157
460
170
370
127
168
440
178
350
119
177
420
186
333
111
186
403
194
315
102
196
385
A
Element
support
Cable connection
Gamma Match
Mounting
A
A
B
C
See “Direction for tuning”
point 4
A
Mast