OT2m beta test kit notes
------------------------

Covers Proto-C revision

Join the Yahoo group at http://groups.yahoo.com/group/tracker2 for the
latest information and support on the Tracker2 kit.

Be careful to avoid solder bridges when soldering 42-pin socket.

D3 as supplied is not polarized.  May be replaced in future versions
with a unidirectional part.

The modular jack is wired for direct connection to the TAI8515 wind
instrument with a standard telephone cable having each pair swapped.


Jumper definitions:

JP1: 1+2 = HT PTT mode
     2+3 = Audio loopback (for tuning)
JP2: 1+2 = Voltage reading is supply voltage
     2+3 = Voltage reading is radio connector pin 8
     3+4 = Radio connector pin 8 is PTT input
JP3: 1+2 = RX equalization
JP4: 1+2 = Supply voltage in/out on serial pin 4
     2+3 = Regulated +5V out on serial pin 4
JP5: 1+2 = Enable power switch output (requires IPS5451 installed)
JP7: 1+2 = Configuration select jumper



Part Values (and markings):

C1 0.01uF (103)
C2, C4, C8, C9, C12, C13, C14, C19-C25 0.1uF (104)
C3 .047uF (473)
C5 470pF (471)
C6, C11 0.027uF (273)
C7 0.47uF - negative lead toward C7 marking
C10 0.33uF (334)
C15, C16 22pF (220)
C17 0.01uF (103)
C18 0.0022uF (222)
u1 socket
u2 socket
U7 socket
D1, D2 1N4148 or 1N914
D3 30V TVS (SA30CA) (not polarized)
Q2 2N7000
R1 2.2k (red-red-red)
R2, R3 10k (brown-black-orange)
R4 4.7k (yellow-purple-red)
R6 20k (red-black-orange)
R7 10k (brown-black-orange)
R8 4.7k (yellow-purple-red)
R9 680R (blue-gray-brown)
R10 18k (brown-gray-orange)
R11, R12 10k (brown-black-orange)
R13 470k (yellow-purple-yellow)
R14 30k (orange-black-orange)
R15 100k (brown-black-yellow)
R16 10m (brown-black-blue)
R17 100k (brown-black-yellow)
R18 51k (green-brown-orange)
R19 510k (green-brown-yellow)
R20 4.7k (yellow-purple-red)
R21 27k (red-purple-orange)
R22 10k (brown-black-orange)
R23 6.8k or 6.2k (blue-gray-red or blue-red-red)
R24, R25 1k (brown-black-red)
R26 10k pot (103)
R27 5k pot (502)
R33 10k (brown-black-orange)
TR1 thermistor (L60 075)
U1 NJM2211D
U2 MC68HC908AP64CB
U3 IPS5451L, VN820, or VN920 (optional)
U4 7805
U5 LM335Z
U7 MAX202
X2 Female DB9
X3 Male DB9
X4 6-pin modular jack
X5 DC 2.1 mm Power Socket
Y1 32.768kHz crystal
JP1-7 - Supplied as 10-pin strips. Cut apart as needed.
D4 Bicolor LED - long lead toward U5