
T-238 Assembly Manual
Rev. 1 February 2001
Page 2 of 11
Contributed files can be found at
ftp://ftp.tapr.org/wxsig/software/. Files can be
anonymously uploaded to ftp://ftp.tapr.org/wxsig/upload/.
T238 is discussed on the Weather Special Interest Group
(WXSIG). You can join WXSIG via the web at
http://www.tapr.org/cgi-bin/lyris.pl?join=wxsig.
Acknowledgments
The Tucson Amateur Packet Radio T238 Kit was made
possible by the efforts of (in alphabetical order):
William Beals, N0XGA - Conceptual Designer
Steve Bible, N7HPR - Project Manager
Joe Borovetz, WA5VMS - Parts Liaison
Russ Chadwick, KB0TVJ - Conceptual Designer
Greg Jones, WD5IVD - Asst. Project Manager
John Koster, W9DDD - PCB Design
And Beta Testers:
Rex Blaine, KI0BJ
Jim Blair, WA5MYI
Steve Dimse, K4HG
Joe B. Dorn, W5VEX
Russ Hummel, WB4PGT
Doug McKinney, KC3RL
Gerald Marchant, WB5NZV
Aaron Morrison, AE4KO
Brian Riley, KA2BQE
Guy Story, KC5GOI
PARTS LIST
The parts list is organized by quantity and part type. Verify
that all parts are present by checking in the [ ] as you
locate the part in the list. You may wish to take this
opportunity to sort the parts into a compartmented
container such as an egg carton or muffin tin as you
inventory them. This will aid you in kit building.
Resistors 1/4 w, 5% Carbon Film:
[ ] (1) 10
Ω
(brown-black-black)
R14
[ ] (1) 470
Ω
(yellow-violet-brown-gold)
R12
[ ] (1) 2.2K
Ω
(red-red-red-gold)
R1
[ ] (1) 1.5K
Ω
(brown-green-red-gold)
R11
[ ] (9) 10K
Ω
(brown-black-orange-gold)
R2-R10
Resistor 1/2 w, 5% Carbon Film:
[ ] (1) 4.7
Ω
(yellow-violet-gold)
R13
Resistor, Trimpot
[ ] (1) 10K
Ω
Trimpot (103)
V1
Capacitors
Capacitors may be marked in various ways. The typical
markings are listed but may vary. Find all that match and
the remaining ones, if any, should become apparent by
elimination.
Mylar or Monolithic
[ ] (5) 0.1 uf (104)
C3-C7
Electrolytic or Tantalum
[ ] (5) 1uF (105 or 1+35)
C8-C12
[ ] (2) 10 uf
C1, C2
Diodes
[ ] (2) 1N4148 Silicon Diode
D2, D3
[ ] (1) 1N5817 Schottky Diode
D1
Light Emitting Diode
[ ] (1) Red T1
DS2
Inductors
[ ] (8) Ferrite Beads
L1-L8
Integrated Circuits
NOTE: Do not handle the ICs at this time! Carefully
remove the black foam carrier with ICs from the bag and
verify the ICs against this list. Do not touch the ICs! Leave
them in the protective foam.
[ ] (1) MC68HC908GP32CP
U3
[ ] (1) MAX232 or HIN232
U4
Voltage Regulators
[ ] (1) 7805 TO-220 case
U5
Crystal Oscillators
[ ] (1) 32 MHz
U1
[ ] (1) 9.8304 MHz
U2
IC Sockets
[ ] (1) 16-pin DIP Socket
U4
[ ] (1) 40-pin DIP Socket
U3
Switches
[ ] (4) SPST Momentary push buttons
SW1-SW4
[ ] (1) DPDT Momentary push button
SW5
LCD Display
[ ] (1) 4 line by 20 character LCD module
Connectors
[ ] (1) 2-pin Molex polarized male header
J8
[ ] (1) 2-pin Molex polarized plug housing
[ ] (2) Molex crimp pins
[ ] (2) 1x3-pin male header
OJ1, OJ2
[ ] (1) 2x5-pin male header
J9
[ ] (1) 2x8-pin male header
J6
[ ] (2) 1x17-pin male header
J10
[ ] (2) 2-pin Jumper, Push-On
[ ] (2) DE9 Female PCB right angle mount
[ ] (1) DE9 Male PCB right angle mount
[ ] (1) 2.1 mm Coaxial Jack
J1
[ ] (1) 2.1 mm Coaxial Plug
P1
[ ] (1) RJ-11 6-6 connector PCB mount
J2
Miscellaneous
[ ] (1) Printed Circuit Board (Rev 3)
[ ] (1) Assembly Manual (this document)
[ ] (1) Flat Ribbon Cable Assembly
[ ] (1) TO-220 heat sink
[ ] (1) 4-40 x ¼” screw
[ ] (6) 4-40 x 3/8” screws
[ ] (7) 4x40 nuts