Chapter 3 - Connecting your radio
16
HF Radio Connector
* Same as 5-pin UTU-XT connector
The prewired cable assembly with an 8-pin DIN connector is for use with the HF port. You will
need to provide the mic-jack connector for your HF transceiver and wire the connector to the pro-
vided cable.
CAUTION: Check your HF transceiver manual to correctly wire the corresponding pins of the trans-
ceiver mic-jack.
Pin 1 – AFSK OUT - white lead
This lead carries the AFSK tones generated by the KAM to the Audio (microphone) Input line of
your transceiver.
Pin 2 – Ground/Shield – black and silver lead
Connect the push-to-talk ground and AFSK shield to this line. With some transceivers which do not
reference PTT and audio shielding to a common ground, it may be necessary to leave the AFSK
shield (braided wire) disconnected.
Pin 3 – Push-To-Talk – brown lead
This line controls the PTT line in your transceiver, allowing the computer to switch the transceiver
from/to transmit or receive. Connect directly to the PTT line of the mic-jack connector.
Pin 4 – Key Out - green lead
This line may be used to control CW keying on your transceiver. Separate a small length of this
lead and attach a lead with the appropriate plug for your transceiver key jack.
Pin 5 – FSK OUT – red lead
This line is for use if your transceiver provides FSK keying for radioteletype operation. Separate a
small length of this lead and attach a lead with the appropriate plug for your FSK input connector
on the transceiver. It will also be necessary to provide for PTT keying via the mic jack, accessory
port or other method specified by your transceiver manual.
Pin 6 – Audio signal – 2 conductor audio cable, center conductor
Plug this lead to one leg of the Y-connector cable provided in the KAM accessory bag. Plug the Y-
connector cable into the external speaker jack of the transceiver. The remaining female connector
on the Y-connector cable may be used for an external speaker. Do not use a headphone output
from the transceiver. If you use an accessory or phone patch output, it may be necessary to pro-
vide a padding network to reduce amplitude of the signal being fed to the KAM. High level fixed
outputs may have a tendency to "swamp" the KAM input circuits. Fixed output signals in excess of
50 mV should be padded.
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