Initial Power Up - QRO Technologies HF-2500DX Instruction Manual

Fault Light/Switch: If you amplifier is operated in such a manner to produce excessive screen
grid current, a protection circuit will place the amplifier in a standby mode. A red light will light in
the fault switch. The amplifier can be reset into a transmit mode by pushing the red switch. A
successful reset will be indicated when the fault light turns off.
Tune Control: A 6-1 vernier drive control used to adjust the input capacitor of the pi output tank
circuit during tune up. 0 - 100 logging scales provide a means to record your tune up settings for
future reference.
Load Control: A 6-1 vernier drive control used to adjust the output capacitor of the pi output tank
circuit during tune up. 0 - 100 logging scales provide a means to record your tune up settings for
future reference.
Band Selector Switch: Selects the desired band of operation
Red LED: When lit, the amplifier has been turned on, and it has gone through its warm up cycle.
Green LED: When lit, the amplifier has been keyed and amplifying the power supplied by the
transceiver.
Preset the amplifier's front panel controls as follows:
On/Off
Operate/Standby
Multimeter
Fan
ALC Adjust
Tune Control
Load Control
Band
Turn the amplifier on by placing the On/Off switch in the on position. The meter lights and blower
should immediately come on. The amplifier is now in its two minute warm up cycle. During this
warmup period, check for the following readings:
Screen (Screen Current):
PV (Plate Voltage):
SV (Screen Voltage):
IP (Plate Current):
OBSERVE THE PLATE CURRENT (IP) DURING THE WARM-UP PERIOD. IF IT STARTS TO
RISE, IMMEDIATELY TURN THE AMPLIFIER OFF. THE PLATE CURRENT SHOLD NOT RISE
DURING THE WARM-UP PERIOD. CALL QRO TECHNOLOGIES FOR INSTRUCTIONS. Place
your transceiver in the CW mode or any mode that will provide a continuous carrier for tuneup.
At this time make sure that your transceivers output power level has been set to zero.

INITIAL POWER UP

Off
Standby
PV (Plate Voltage)
Fan High
Full counter clockwise
Zero
Zero
160
Zero
2.4 KV to 2.6 KV
Approx. .35 KV (350 V)
Zero
12