IC1 --------- CA3086 / ECG912

PB1 -------- Any kind of momentary push button type switch.

1 ------- Positive 9 VDC, battery ( may be able to use the constant 12v supply in radio )

2 ------- Any color wire from push button to Tweety.

3 ------- Negative side of battery (or the shield in mic line).

4 ------- To audio wire in radio (+ side of microphone element).