TINY-2/MICRO-2 Technical Ref., 2. Ed 1989
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Accessory Jack Connection
If the radio has an accessory jack with PTT, transmit audio, and receive audio signals, all connec-
tions between the radio and TINY-2/MICRO-2 may be done through this jack. The TINY-2/MICRO-
2 is designed to operate with from 10 to 700 millivolt audio input. This is compatible with the sig-
nal level provided by most modern transceivers at the "Fixed Audio Output" connector on the rear
panel. It is recommended that a squelched fixed audio output be used if available. If the audio
output is squelched or can be adjusted to a low enough level to prevent false carrier detection, a
direct connection to the TINY-2/MICRO-2 audio input may be made.
External Interface Box
If you desire to use the radio for both packet and voice, and the radio does not have an accessory
jack and you don't wish to add a connector to the radio, you should construct a separate interface
box to permit simultaneous connection of the TINY-2/MICRO-2 and a microphone. It may either
have its own speaker or pass the signal through to a speaker so that you can monitor the receive
audio while the packet controller is hooked up. A schematic of an external interface box is shown
below.
External Interface Circuit Schematic
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