User`s manual

SG-211 User’s Manual

design and installation of your HF system, the operator

can expect top performance. Further information

regarding applications, installation and operation can be

downloaded from our website www.sgcworld.com. These

publications include:

• HF User’s Guide

• Go Mobile at 500 Watts

• Stealth Antennas

• Smartuner Antenna Coupler

Manuals

3.8 Do-it-Yourself Light Bulb Test

Any time a transmitter is used, its output must go to a

load. A load is anything that the output power can be

pumped into. If the transmitter is operated without a load

connected, the final amplifier stage could be severely

damaged. Never test a transmitter on the air for the first

time if you are unsure about how to operate it or if you

are unsure whether it is working properly. You could

create harmful interference to other stations.

To test transmitters without actually operating into an

antenna, dummy loads were created. A dummy load is a

load that will dissipate the energy from the transmitter

instead of emanating it into the ionosphere. Nearly all

commercial dummy loads are large oil-filled cans. These

dummy loads change the transmitted energy into heat,

which is absorbed by the oil. Because different

transmitters output different amounts of power, different

sizes of dummy loads must be used. Dummy loads for

typical amateur powers (<500 watts) are relatively

inexpensive and are readily available.