3. Installation
3.5.3 Connection PTC – YAESU
Some YAESU transceivers use a 5 pin DIN plug (Packet) and can be connected this way:
Signal PTC Color YEASU
GND PIN 2 white PIN 2
PTT PIN 3 yellow PIN 3
AF-OUT PIN 1 violet PIN 1
AF-IN PIN 4 green PIN 4
Table 8: YAESU 5 pin
Smaller YAESU’s use a 6 pin Mini-DIN connector, whereby with multiband transceivers two
different connection schemes must be destinguished:
- For HF and 1k2 Packet-Radio:
Signal PTC Color YAESU
GND PIN 2 white PIN 2
PTT PIN 3 yellow PIN 3
AF-OUT PIN 1 violet PIN 1
AF-IN PIN 4 green PIN 5
This cable is available completely assembled.
Refer to chapter 5 on page 52.
Table 9: YAESU 6 pin Mini-DIN
- For 9k6 Packet-Radio:
Signal PTC Color YAESU
GND PIN 2 white PIN 2
PTT PIN 3 yellow PIN 3
AF-OUT PIN 1 violet PIN 1
AF-IN PIN 4 green PIN 4
This cable is available completely assembled.
Refer to chapter 5 on page 52.
Table 10: YAESU 6 pin Mini-DIN
3.5.4 Amplitude Adjustment
The PTC’s output amplitude has to be adjusted very carefully to the connected transceiver. If
you don’t pay attention on this item a signal much too wide will be the result!
The output amplitudes are adjusted separately depending on the FSK modes (PACTOR-I,
AMTOR, RTTY, etc.) and the PSK modes (PACTOR-II/III). A common adjustment with one
command was in practice not the best way.
The audio input sensitivity of most transceivers is adapted to the output voltage of a common
dynamic microphone. 100% modulation is reached at low mic gain settings with 200 mV (peak
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