AMERITRON ALS-1306 - Operation; Alert Codes; Before Attempting Operation

Revision 2
4
Operation
This amplifier has alert codes. SWR, PA, TX, and band switch lamps indicate operational faults.
Operational faults reset by placing the amplifier in standby momentarily. The following table
applies to faults:
Warning
light Steady
Warning
light Flash
Fault Cause or Cure
SWR TX
Antenna Reflected
Power
High antenna SWR or
intermittent antenna or feed line
connection
SWR, PA Band
Wrong filter Exciter or amplifier on
incompatible band, filter failure
PA TX
PA FET too hot Excessive power for duty cycle
or SWR, lack of proper airflow
PA Combiner unbalance
10M, PA,
TX
Illegal 11 meter Excessive 27 MHz signal level
REM, PA
No or wrong band when
on remote
Defective or improper remote
cable, or bad radio band data
information
Before attempting operation:
1.) This amplifier is optimized for a 50-ohm load. Be sure your antenna system 50-ohm
SWR is as low as possible. As SWR increases from 1:1, either heat or distortion
will increase.
2.) Be sure your antenna system, including any lighting protection devices, will safely
handle high power.
3.) Connectors, cables, and antennas must not have loose connections or insulation
issues.
4.) Your exciter must be less than 100 watts output.
5.) Power mains should capable of 15 amperes, reasonably stable, and 200-260 volts.
6.) The low pass filters cut off just above traditional primary bands. This means
primary filters are used on WARC bands. Some radios do not supply enough band
data to know the exact band, so with some radios the amplifier band data displays
the next higher primary band above a WARC band. Do not be alarmed if, for
example, 15 meters illuminates when 17 meters is selected on some radios.
7.) The amplifier will automatically attempt to reduce power if it appears thermal
limits will be reached.
8.) The amplifier will shut off if an incorrect band is selected, if antenna SWR is too
high (even for an instant), if thermal limits are reached, or if there is a catastrophic
failure.
9.) The alert codes are in a table above on page 10.
10.) The ALS-1306 metering reads peak envelope power on all RF power functions.