User's Manual

Page 10 of 17
4.4. Mains Supply
CAUTION
Be sure you got PA with properly terminated mains cables, corresponding with your
power system’s outlet. If not, contact your dealer. In such a case you should make the
necessary changes using a licensed electrician.
WARNING!
Be sure that your power system is correctly wired and properly rated! To use
adequately sized and connected grounding system is also very important.
4.5. Cooling
CAUTION
The amplifier must be installed in such a way that free flow of hot air from the tube is
allowed. Do not obstruct air intake and exhaust areas of the PA.
The centrifugal blowers provide the necessary cooling of the amplifier, even during long
contests. The main blower is activated by switching the PA on and it is turned off when
cooling is finished (approx. 1-5 min after switching off the PA depending on the temperature
of the tube). The supplemental fan is turned on depending on the temperature of the air exiting
from the amplifier. It is switched on at 158°F and switched off at 140°F.
5. OPERATION
WARNING!
Before switching PA on, make sure that amplifier is grounded, antenna or dummy load
is connected, and line cord is putted to the outlet.
CAUTION
Before switching PA on, check all connections between PA and TCVR.