©2008 Hamtronics, Inc.; Hilton NY; USA. All rights reserved. Hamtronics is a registered trademark. Revised: 6/3/10
- Page 6 -
PARTS LIST FOR T301
EXCITER, REV F.
☞
Note: Values which vary with freq.
band are shown in a table at the end of the
parts list. Parts on bottom of board are 0805
or 0603 surface mount parts.
Following are notes specific to certain
parts.
➊
Remove tuning slugs from coils L9-L11
in the output of the PA stage.
➋
Microcontroller must be factory pro-
grammed for proper band segment and for
TCXO or crystal osc option.
Caution: Ic’s are static sensitive. Use
appropriate handling precautions to avoid
damage.
Ref Desig
Value (marking)
C1
1 µf electrolytic
C2
0.1µf
C3
220pf
C4
100µf electrolytic
C5-C7
not assigned
C9
0.1µf
C10
0.15µf mylar (red)
C11
.01µf
C12
.001µf
C13
0.1µf
C14
10µf electrolytic
C15
0.1µf
C19
10µf electrolytic
C22
4pf
C26
not assigned
C27
0.1µf
C28
100µf electrolytic
C29
10µf electrolytic
C30
not assigned
C43
0.1µf
C47
1µf electrolytic
C49
.033µf
C50-C51
10µf electrolytic
C52
1µf electrolytic
C53-C54
.0033µf
C55-C56
220pf
C58
10µf electrolytic
D1
BB132 varactor diode
D2-D3
not assigned
D4-D5
1N4148
J1
RCA Jack
L2
0.33µH RF choke
(red-sil-orn-orn)
L3-L5
2½ t., slug tuned (red)
L8
2½ t., slug tuned (red)
L9-L11
➊
2½ t., NO SLUG (red)
Q1-Q2
2N5770
Q3
MMBT3904
Q4
PN5179
Q6
MRF237
R1
180
Ω
R2
2meg
R3
not assigned
R4-R5
15K
R6
100K
R7
1 meg
R8
2.2K
R9
10K
R10
6.8K
R11
3.9K
R12
180
Ω
R13
47
Ω
R14
47K
R15
470
Ω
R16
not assigned
R17
6.8K
R18
2.2K
R19
100
Ω
R20
15K
R21
2.2K
R23
not used
R25
470
Ω
R26
1K trim pot. (102)
R27
47K
R28
1K
R29
150K
R30
3.9K
R31
4.7K
R32
2.2K
R33
1K
R34
10K
R35
1K trim pot. (102)
R36
47K
R37
10K
R38-R39
15K
R40-R41
47K
R42
3.9K
R43
27
Ω
R44
100
Ω
R45-R46
27
Ω
S1
10 pos. DIP switch
U1
➋
MC68HC705J1A µP
U2
MC145191F synthesizer
U3
10.240MHz TCXO (option)
U4
78L08ACD (smt) regulator
U5
LM324D (smt) op amp
Z1-Z4
Ferrite bead, prestrung
VALUES WHICH VARY WITH
FREQUENCY BAND:
T301-2 is 144.000 - 154.235 MHz
T301-3 is 154.200 - 164.435 MHz
T301-4 is 164.400 - 174.635 MHz
T301-5 is 216.000 - 226.235 MHz
T301-6 is 220.000 - 230.235 MHz
Ref Desig
-2
-3
-4
-5/-6
C16
10
8
7
7
C20
12
10
8
10
C21
47
43
30
47
C24
33
27
22
10
C25
47
39
30
18
C31
8
7
6
6
C32
33
27
22
12
C33
47
39
30
18
C36
30
22
15
7
C37
47
39
27
n/u
C39
8
8
8
2
C40
22
18
15
6
C44
50pf
var.
(orn)
50pf
var.
(orn)
50pf
var.
(orn)
30pf
var.
(grn)
C45, C46
18
15
12
4
C59, C60
15
12
10
8
L1
➌
2½T
(red)
2½T
(red)
2½T
(red)
Short
1½T
L6, L7
0.33µH 0.33µH 0.33µH 0.22µH
Q5
2N 5770 2N 5770 2N
5770
MPS
5179 *
R22
10
Ω
10
Ω
10
Ω
27
Ω
R24
47
Ω
47
Ω
47
Ω
100
Ω
R45-R46
27
Ω
27
Ω
27
Ω
47
Ω
* Caution: MPS5179 has different pin out
from PN5179. Both are used on 220 band.
Bypass capacitors C8, C17, C18, C23, C34,
C35, C38, C41, C42, C48, C57 are 390pf for
T301-2, -3, and -4 and 220pf for -5 and -6
