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DOCNUMBER 8410
Document Issue 1.1
August 2015
Page 4–7
RKR Designs LLC
Alpha 8410 Linear Amplifier User Manual
Setting Up the Amplifier
Some transceivers may produce RF spikes upon keying during SSB
operations. Do not operate the amplifier with transceiver power controls
set at full power output. Do not rely on the mic gain control to set power.
Rather, set up the transceiver with proper mic gain and processor levels at
normal power level to drive the amplifier (typically 50 W).
CAUTION
!
CAUTION!
It is not sufficient to set only the transceiver POWER or
RF PWR control.
Several popular transceivers can generate RF spikes of 200–300 W.
Control these spikes with a knob labeled
DRIVE
(IC-781, FT-1000) or
PROCESSOR OUT
(TS-940,TS-950). On SSB, when you are not
using speech processing, adjust the MIC or MIKE controls. For more
information, see the manual for your particular transceiver.
4.7 Connect the Transceiver Keying Line
Procedure 4-6
Connect the transceiver keying line
Step 1
Connect the transceiver keying line.
The following is a list of popular transceivers and considerations for their
connection to the amplifier. For advice on other transceivers, contact
RKR Designs as described in
Chapter 1, “Introduction.”
Table 4-1
Popular transceivers
Transceiver
Connection and keying information
Icom
RF —
T/R — Connection with the “Send” jack. For
information, see the transceiver user manual.
Kenwood
RF —
T/R — For information on connecting to external
amplifiers, see the transceiver user manual.
Yaesu
RF —
T/R — Connection with the RCA TX GND connector
and/or TX GND signal in the DIN Band Data
connector. For information, see the transceiver user
manual.
Older
transceivers
For information on connecting to external amplifiers,
see the transceiver user manual.
