- 29 -
9) Test reception of each Active Vertical Antenna by connecting each antenna feedline, one at a
time, to an activated port on the Receive Eight Circle System. This assumes that a good port
has been identified and is functioning properly. Normal reception must be confirmed from each
antenna. If any antenna is not providing the proper RF signal level, move the AVA unit to a
known good feedline position to rule out the possibility that a bad feedline is attenuating the
RF. If one or more Active Receive Verticals produce a low or no signal, then the AVA unit at
the base of that antenna may not be receiving power. Retest for DC power at the antenna end of
that feedline. If + 10 to 18 Vdc is found, then the Active unit may need to be serviced or
replaced. New
DXE-AVA-2
units are available separately by calling DX Engineering.
10) If all Active Verticals tested provide the same signal level, then change switching voltages to
activate the other ports, one at a time, and test each Receive Eight Circle System unit port,
using one of the good antennas, testing for the same level of reception. If one or more ports is
dead or has diminished reception, there may be a problem in a delay line or in the Receive
Eight Circle System unit.
11) Using tested or replaced delay lines and connectors, if one or more ports is dead or has
diminished reception, the
Receive Eight Circle System unit may require service or replacement.
At this point, the problem in your system should have been identified.
If you need additional assistance from DX Engineering, feel free to call or write. Detailed
discussions of system function, connections, and troubleshooting is best handled by telephone,
Monday through Friday, 8:30 am to 4:30 pm Eastern Time, at 330-572-3200.
Optional Items
DXE-RPA-1 - Receiver Preamplifier, 0.3-35 MHz
This is the best HF low noise amplifier available. The RPA-1 is optimized for 0.3-35 MHz operating range. The push-pull amplifier
design and robust components enable it to withstand high signal levels and operate when you need it most. The dynamic range of the
RPA-1 is better than most receivers. The RPA-1 is suitable for indoor or outdoor installation, with the option of
being powered through the coaxial feed. The metal housing provides shielding and improved lifespan. The unit
uses RCA type phono jack and CATV F connector for the input and output connections, and has a relay that
automatically bypasses the amplifier when dc power is removed.
Benefits:
Push-pull operation eliminates harmonic distortion
High quiescent current increases ability to handle strong signals without distortion or overload
Meticulous craftsmanship and durable components provide superior dynamic range
RCA type phono jack and type F connector ease installation
Simplified switching - automatic bypass eliminates gain when dc power is off
10-18 Vdc power using power connector or through the coax
10-18 Vdc through coax enables remote operation at antenna
