INTERFACE OF PACKET TNCS

The VX-8Rmay be used for Packet operation, using the optional CT-44and CT-131microphone adapter (available from your Yaesu dealer) for easy interconnection to commonly -available connectors wired to your TNC. You may also build your own cable using a four-conductor miniature phone plug.

The audio level from the receiver to the TNC may be adjusted by rotating the DIAL knob

while pressing and holding the key, as with voice operation. The input level to the VX-8Rfrom the TNC should be adjusted at the TNC side; the optimum input voltage is approximately 5 mV at 2000 Ohms.

Be sure to turn the transceiver and TNC off before connecting the cables, to prevent voltage spikes from damaging your transceiver.

CT-131Microphone Adapter

CT-44Microphone Adapter

 

 

TNC

EAR

 

SP

 

10 µF

GND

3.5φ Plug

MIC

 

MIC

2 kΩ

PTT

 

GND

 

 

2.5φ Plug

12

VX-8R OPERATING MANUAL