In these situations, the optional limp-wire antenna will perform best. The overall
efficiency of the limp-wire antenna is about the same as for the wire whip. When the
receiver is worn on the belt, body absorption will still reduce the range significantly,
but this loss will not be added to that of an already inefficient antenna. The limp-wire
antenna also has the advantage of being comfortable to wear, since it is highly flexible
and conforms easily to the body.
While the standard or optional antennas available for use with the R-27 should cover
the majority of applications, other types of antennas may be needed for unusual
applications, such as operating at extreme ranges of 1000 feet (300 m) or more. TV
antennas (with an appropriate matching transformer) are often used for this purpose. A
“high-band” wide-bandwidth yagi antenna (Winegard AK5713, or similar) works well
in this application. VHF communications antennas are also sometimes used for
specialized requirements. However, such antennas are usually narrow-band and must be
modified to function properly in the 174 to 216 MHz range. Contact the Vega factory
or your sales representative for assistance in selecting antennas for unusual applications.
Wiring Connectors and Plugs
Preparing high-quality cables, with connectors properly installed, is the key to reliable
and trouble-free operation of any sound system. A few moments of extra care here can
save hours of troubleshooting later on.
As a rule, the amount of insulation removed and the length of exposed cable should be
minimized. This reduces the likelihood of short circuits and improves the ability of the
clamp to grip the cable firmly. Just enough heat should be used to obtain a free flow of
solder, but to allow leads to cool quickly after solder flows to avoid melting insulation.
After each connector has been completely wired, the cable should be tested with an
ohmmeter or a cable tester. Continuity between the various conductors and their
associated connector pins must be established, and there should be infinite resistance
(an open circuit) between all connector pins. In most cases, especially in portable
installations, XLR connectors should not conduct at all between the shell and pin 1.
This avoids grounding problems from inadvertent touching of the shell to other devices.
The XLR connector provides front-panel balanced mic-level audio outputs. The pin
connections for this connector are as follows:
Pin #1......Shield (common to receiver ground)
Pin #2......Balanced audio out (“high”)
Pin #3......Balanced audio out (“low”)
Troubleshooting
Most users of Vega equipment enjoy years of trouble-free operation from their wireless
microphones. However, as with all electronic devices, problems may be encountered
eventually. If you experience difficulty with your Vega wireless-microphone system
within the first year of operation, it will be repaired under warranty (see below). Service
for older units may also be obtained from Vega; contact the factory or your sales
representative for information.
The majority of difficulties with Vega wireless microphones are not due to equipment
failure. This equipment is fully tested before leaving the factory and is inherently
reliable. In most instances, problems are due to equipment application.
Wireless-Microphone Receiver
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