12
10. Cooling technique
The integrated axial blowers are temperature controlled and provide sufficient
cooling during long time operation at full output power with minimum noise
level. During the TX period the airflow through the RF box is increased by
higher speed of the cavity blower which is noticeable by a slight noise increase.
Especially during long term operation with MS or WSJT this is essential for
avoiding rapid temperature rise of the RF pc board and the capacitors.
To achieve best airflow for cooling, the air in- and outlets must not be covered.
Do not operate the amplifier in close proximity to heaters and radiators. If
thermal shut down occurs you should wait until the device temperature
decreases sufficiently before switching on the amplifier again. Please read also
our “Safety instructions” and “Electrical connections”.
ATTENTION !
This device is not designed for 100% duty cycle at rated output power.
Only an intermediate operation including a sufficient recovering time for
cooling is permitted. Max. duration for a once non stop TX-period @30°C
or 86°F is 5 minutes.
Summary of Contents for HLV-350
Page 1: ...1 HLV 350 Instruction Operations Manual ...
Page 13: ...13 11 Block diagram ...
