Maco Antennas v-5000 Assembly Instructions Manual - page 4
M
A
C
O
V-5000
ASSEMBLY INSTRUCTIONS
(Continued)
MOUNTING THE BASE SECTION
The Clamp Ring C13P is round when received. It must be made egg-shaped enough to allow the Hex Nut
N01 to go between the clamp and the Base Assembly BA5P.
On a mast with an outside diameter of up to 1-1/4”, position the Clamp Ring C13P on the base and install
the 5/16
”
-18 x 1” Hex Bolt S24 and Nut N01 as shown (See Detail 2D). Insert mast pipe 6” into the base
and tighten.
ADJUSTING THE STANDING WAVE RATIO (SWR)
There are only two possible adjustments. The main adjustment is the length of the antenna. This should
be changed at the top of the base section. Loosen Hose Clamp W10P and adjust. It is recommended that
you work in 1/4" increments so as to tell if you are going in the right direction.
The other adjustment is the position of the Clamp C01 on the ring. It is recommended that if the SWR is
about the same on both ends of the band, this adjustment be left alone. Adjust only to try to get the SWR
at both ends of the band equal. This adjustment only moves the SWR a small amount.
REMEMBER, THIS ANTENNA REACTS TO EVERYTHING IT CAN SEE. THIS MEANS THAT
TREES, POWER LINES, BUILDINGS, AND OTHER ANTENNAS AT THE SAME HEIGHT WILL
AFFECT THE SWR. THE V5000 CAN BE TUNED MOUNTED 6 FEET OR SO ABOVE THE
GROUND AND SHOULD NOT CHANGE WHEN PERMANENTLY INSTALLED.
FREQUENCY TO LENGTH CHART for V-5000 26-33 MHz Antenna
THIS CHART MUST BE USED TO SELECT THE OVERALL LENGTH FOR THE ANTENNA.
FREQUENCY OVERALL
LENGTH
(MHz) (INCHES)
26.0
249
27.0
248
28.0
232-5/8
29.0
225-3/4
30.0
215-1/4
31.0
209-1/8
32.0
203-1/2
33.0
198-1/4
NOTE:
1 - To use at other frequencies (25-50 MHz), change the length.
2 - These measurements are for the overall length of the antenna. This means the top is where the
plastic cap goes and the bottom is below the hole for the mounting bracket C13P.
IF THIS ADJUSTMENT IS NOT MADE THE ANTENNA WILL NOT WORK CORRECTLY!
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Rev. 2/10