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HW-9
Heathkit HW-9 User Manual
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1
03
Heathkit
TRANSISTORS
CIRCUIT
COMPONENT
NUMBER
Q102,
Q105,
Q112,
Q301,
Q302
Q40
1,0402
Q407,
Q412
Q106
Q1
01
,01
08
Q1
09,0111
Q103,Q104,
0113,
Q114,
Q115,Q303,
Q411
Q408,
Q409
Q107
41
7-863
HEATH
I
PART
NUMBER
MAYBE
REPLACED
WITH
IDENTIFICATION
417-169
MPF105
<y
I
D
S
G
b
G
MFE131
G1
G2
Q404
41
7-205
2N3866
Q405,
Q406
417-912
MRF237
B
B
102
104
Table of Contents
Table of Contents
2
Introduction
3
Unpacking
4
Tools
5
Other Helpful Tools
5
Assembly Notes
5
Soldering
6
Parts
7
Capacitors
7
Special Assembly Notes
8
Resistors
9
Parts List
9
Taped Components
9
Oscillator Circuit Board
9
Step-By-Step Assembly
13
A Good Solder Connection
15
Poor Solder Connections
15
Solder Bridges
15
Oscillator Circuit Board
26
Parts List
27
T/R Circuit Board
27
Step-By-Step Assembly
31
Chassis
49
Parts List
49
Initial Tests
73
Resistance Tests
73
Alignment
77
Initial Control Settings
77
HFO Alignment
78
VFO Alignment
79
BFO Alignment
79
Transmit Return Adjustment
79
Mixer Filter Alignment
80
T/R Board Adjustments
81
Receive if Alignment
81
Transmit Bandpass Alignment
81
AGC Adjustment
81
BFO Filter Adjustment
83
HFO Level Adjustment
83
Final Assembly
85
Installation and Operation
86
Ground
86
Antenna
86
Mute Delay
86
DC Power
87
Speaker
87
Front Panel Controls
88
Headphone
88
Key
88
AF Gain/Off
88
In Case of Difficulty
89
Visual Checks
89
Precautions for Troubleshooting
90
Checking Transistors and Diodes
90
Silicon Bipolar Transistors
90
Mosfets
90
Troubleshooting Chart
91
Diodes
91
RIT Problem
91
Sidetone Problems
91
General Receiver Problems
92
General Transmitter Problems
92
Transmit and Receive Problems
92
HFO Problem
93
VFO Problems
93
Mixer Filter Problems
94
Specifications
95
Receiver
96
Transmitter
97
Circuit Description
98
Receiver Signal Flow
98
Transmitter Signal Flow
98
Vfo
99
1St Mixer
99
Premix Filters
99
Rit
99
2Nd Mixer
100
Side Tone
101
Receiver Muting
101
Keying Circuit
101
Audio Circuits
101
Semiconductor Identification Charts
102
Transistors
103
Circuit
103
Integrated Circuits
104
Illustration Booklet
106
T/R Circuit
112
Board X-Ray Views
142
Circuit
142
Schematics
144
4
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Heathkit HW-9 Specifications
General
Brand
Heathkit
Model
HW-9
Category
Transceiver
Language
English
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