Packet Radio

BayCom Modem for Packet Radio.

Circuit board:
modem.tif (21120 bytes)

Circuit Diagram:

baycom1.gif (22386 bytes)

Component List :-

Capacitors
:
100 uF 35v Elec. pc mount
10uF 35v Elec. pc mount
10uF 65v Axial Elec.
2 x 33 pF
Diodes:
6 x 1N4148
IC's:
TCM 3105
74HCT14
78L05 or 7805
Transistors:
BC548
Xtal:
4.433619 MHz
Sockets:
14 & 16 Pin DIL Sockets
Resistors:
4x 100k
1x 2.2k
1 x 3M3
1 x 50k Pot
1 x 15k
1 x 33k
2 x 100 ohm
1 x 10k Pot