PALSTAR
For AM or FM power levels must be adjusted in that mode.
For AM mode set carrier no higher than 275 Watts. AM
requires peak power of 4 times carrier level.
AM/FM Power Set Procedure
TROUBLESHOOTING
Bypass SWR: [as seen on display]
Amp is in BYPASS to protect from high SWR. This
indication shows up whenever SWR is, (or has been) over
2.5:1 during a transmission. Transient faults such as
antenna arcing can show a low SWR after the fault event,
while transmitter is still keyed up.
Solution:
1) Make sure correct LA-1K antenna connector is
selected.
2) Verify that your HF-AUTO or other tuner has obtained
a good match while amp is in standby. Attempting Auto
tuning at high power can cause this “Bypass SWR” alert.
With some autotuners it may be necessary to select
manual mode after obtaining a low SWR to prevent
unwanted tuning in the middle of your transmission.
3) If antenna arcing or loose connection is suspected,
try the amplier on a dummy load. If it works normally,
there is likely some type of intermittent SWR problem.
Transmit Fault Indications
Bypass+VD: [as seen on display]
Amp is in BYPASS to protect from loss of +50V, drain
voltage supply. The indication should clear in a few
seconds. This occurs when operating on 120V, if Drain
Current (Id) exceeds 32 Amps.
Solution:
Switch supply voltage to 240V, or If operating on 120V,
Reduce Drive Power.
Bypass TEMP: [as seen on display]
Amp is in BYPASS to protect from high temperature.
Temperature will show in red when temperature exceeds
71 degrees C. When the heatsink temperature exceeds
100 degrees C. “Bypass Temp” will show on the display.
(Amplier locked in Bypass)
Solution:
Allow time for the heatsink to cool down to below 70
degrees C.
Operate mode will automatically return. Verify that
nothing is blocking proper airow through the side
vents.
Note: High SWR, or prolonged transmission in carrier
modes, may cause elevated temperature.
PALSTAR
TX Wait: [as seen on display]
This shows on display when the PTT Line is grounded but
NO RF is present. RF must be applied with PTT line low
to key the amplier to the transmit state.
Other Issues:
Won’t amplify or autoband switch when transmitting.
Solution:
Make sure that the PTT cable is connected to the
transceiver. This is a REQUIRED connection. Note that
“TX” will show on display whenever the PTT connector
sees a ground. Some transceivers must have their PTT
keying output enabled in the transceiver’s menu
settings.
Low SWR on transceiver, high SWR on LA-1K
This problem arises when you observe Low SWR on
transceiver, but the LA-1K shows High SWR.
Solution:
Always disable (i.e. Bypass) the autotuner in your
transceiver when driving any amplier.
The transceiver’s autotuner can not match loads
connected to the amplier’s output.
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w innych językach
- English: Palstar LA-1K Owner's manual
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