Receive Eight Circle Troubleshooting - DX Engineering DXE-RCA8B-SYS-4P Manual

Endfire
Spacing
Distance
Between
Freq
Antennas
MHz
= 246/F
[feet]
1.800 136.67
1.825 134.79
1.830
134.43
160M only
1.860 132.26
3.500 70.29
67.40
3.650
3.800
80M only 64.74
or 160 & 80M
7.200
34.17
40M only
160/80/40M
special array* 38.6
(6.369 MHz)
Table 5 – Array Dimensional Layout (Highlighted figures are optimal for 1.83, 3.8 and 7.3 MHz)
*Special Array - See the discussion of patterns actually obtained with an Eight Circle Array radius
of only 50 feet in the preceding section
For optimal performance a Receive Eight Circle Array should be sized for a single band according
to the dimensions in Table 5

Receive Eight Circle Troubleshooting

There are several possible causes for a malfunction of a DX Engineering Receive Eight Circle
System. Testing the system is not difficult and can be completed in an hour or so. Separate circuits
for directional switching, Active Vertical Antenna power, and antenna phasing can each be affected
by a variety of cabling, connection and or component problems. If you are troubleshooting a new
system or using a replacement DXE-RCA8B-1 Receive Eight Circle Array Controller unit, check
that the wiring from the Control Console to the Array Controller is correct and no damage has been
done to the lines.
Here are the most common causes of Receive Eight Circle malfunction, especially in a system that
was previously functioning properly:
Radius of Circle
Radius of
One Half
Circle[feet] = 1/2
Distance
distance between
Between
antennas divided by
Antennas
sin 22.5 degrees
[feet]
(0.383)
68.33 178.6
67.40 176.1
67.21
175.64
66.13 172.8
35.14 91.8
33.70 88.1
32.37
84.58
17.09
44.66
19.3
50.5
Multi-Band Arrays with Active Elements.
- 26 -
Broadside
Spacing
Diameter,
Endfire
Diameters Spacing &
of Circles Broadside
[feet] Spacing
form a
triangle.
357.1 329.9
352.2 325.4
351.3 324.5
345.6 319.3
183.7 169.7
176.1 162.7
169.2 156.3
89.32 82.5
101.0 93.28
Broadside
Spacing as
a % of WL
0.604
0.604
0.604
0.604
0.604
0.604
0.604
0.604
0.604