8-2
How to Operate
8-2-1 Connect AC cord and coax cables as illustrated in Section 7
Connection
.
Connect the cable from “SEND” to ACC or the remote terminals of transceiver,
where it is marked “SEND” or “TX GND”. These terminal pins are shorted to
ground when the transceiver is in TX/ON AIR mode. If these connections are not
made, the amplifier will not go into TX (amplification) mode. For a temporary
check to the amp, ground the SEND center pin by inserting an RCA plug whose
center pin has been soldered to the outer case of the plug with a small piece of
wire. As a side note, this SEND terminal shows 12 VDC when open, and draws
35 mA when shorted.
8-2-2
At first, turn the ALC knob full clockwise to avoid ALC voltage to the
transceiver. Application of ALC will be covered in the following Section 9.
8-2-3
Keeping the POWER (AC mains) switch off, check the SWR of your
antenna by keying the transceiver to TX mode (CW or RTTY mode). Monitor the
SWR with an external SWR/Power meter. If SWR is 1.8 or higher at band center,
the antenna has to be adjusted for lower SWR.. As an alternative, an antenna
tuner may be inserted.
8-2-4 While keeping OPER/STBY switch at STBY position, turn the POWER
switch on. Turn
④
BAND AUTO-MAN’L switch to AUTO, or MAN’L(manual)
position. If MAN’L is selected, turn BAND-MAN’L switch to desired band. See
page 17, Section10.
Band Data Cable Connection
, for more details of various
band data cables. Turn the STAND-BY switch to OPER (operate) position and
the amplifier is ready to go. If the POWER switch is turned on, while
OPER/STBY switch is at OPER(operate) position, the orange OPER lamp will
blink, and you will need to reset the OPER switch to enter into operation mode.
“PSE STBY OPERSW is displayed at this time. If you key the transceiver with
the carrier level set relatively low (such as 20-30W), you will achieve an
amplified output signal of a few hundreds watts. Monitor this output with the PF
meter or with an external power meter. Increase drive level to roughly 50W and
see if the antenna SWR stays constant. (As higher RF currents flow some
antennas may show a changed SWR value due to heated connector junctions
and trap coils.)
14
