Kenwood TS-950SDX Instruction Manual page 56

5-6-6. Linear Amplifier Control
LINEAR AMP switch
56
The external control relay is not activated at the factory
so that the operation of the radio will remain at the
lowest mechanical noise level during CW Full break-in
operations. If the use of this control relay is required,
such as for use with an external linear amplifier. It may
be activated by setting the LINEAR
AMP switch to ON.
12 volts at approximately 10 mA maximum is available at
pin number 7 of the REMOTE connector for control of
an external keying relay, if necessary. We recommend
the use of a 7 pin DIN plug for this connection. When
operation of this transceiver with the TL-922/922A
is
anticipated you should use the control cable supplied
with the linear amplifier.
Most linear amplifiers require a ground on transmit. This
is available by connecting pin 2 of the remote connector
to ground. Then connect the center conductor of your
linears relay control line to pin 4. The relay in this
transceiver is capable of handling 100V DC at 500 mÀ.
| Note |
| The TL-922/922A is NOT designed for Full Break-in
operation. Attempting operation of the linear in this
mode might lead to damage in the linear amplifier.
CW SEMI break-in switching time:
The TS-950SDX RX to TX switching time in semibreak-
in is approximately 15ms. At key down, the transceiver
may see an open circuit because the liner amplifier
keying relay has not engaged. As a result, the
transceivers protection circuit turns on, causing the
output power to be reduced. If this should occur, cut
jumper W1 as show in the illustration. This will change
the RX to TX switching time to approximately 30ms. The
full break-in switching time is not affected by this
change.
Switching Time |
wi j ikii
| SEMI FULL
Connected Approx. 15 ms Approx. 15 ms
i Open Approx. 30 ms Approx. 15 ms |