Home
QRP Labs
Transceiver
QCX 5W CW
QRP Labs QCX 5W CW - User Manual
138 pages
Manual
Specs
Ask a question
Save Page as PDF
To Next Page
To Next Page
Loading...
QCX assembly Rev
1.08
1
QCX CW Transce
iver
QCX 5W CW Transceiver kit assembly instructions
The “QCX”: a s
ingle ba
nd, high performance 5W
CW
Transceiver with built-in al
ignment and t
est equipment,
iambic keyer, WSP
R beacon mode, and
more...
Designed and produc
ed b
y QRP Labs, 2017
(pictured with Palm Radio pico paddle
http://palm-radio.de/english/eppaddle.html
)
2
Table of Contents
Main Page
Default Chapter
2
Table of Contents
2
1 Introduction
5
2 Parts List
6
3 Assembly
7
Inventory Parts
13
Install IC2 Socket
14
Install DIP Integrated Circuits IC3, IC5-10
14
Install All 100Nf (0.1Uf) Capacitors
15
Install All 470Nf Capacitors
16
Install All 1Nf Capacitors
17
Install All 10Nf Capacitors
17
Install 47Nf Capacitors
18
Install 39Nf Capacitor
18
Install 2.2Nf Capacitors
19
Install 33Nf and 3.3Nf Capacitors
19
Install Capacitors C25 and C26 from the Low Pass Filter Kit
20
Install Capacitors C27 and C28 from the Low Pass Filter Kit
21
Install Capacitor C30
22
Install Capacitors C5 and C8
23
Install 1Uf Capacitor
24
Install 1N4148 Diodes
24
Install 1N5819 Diode
25
Install 20Mhz Crystal XTAL1
26
Install 27Mhz Crystal XTAL2
27
Install All 10K Resistors
27
Install All 1K Resistors
28
Install All 3.3K Resistors
29
Install All 100-Ohm Resistors
29
Install 120K Resistors
30
Install 33K Resistors
30
Install 47K Resistors
31
Install 36K Resistors
31
Install 270-Ohm Resistor R48
32
Install 470-Ohm Resistor R41
32
Install 3.9K Resistor R61
33
Install 4.3K Resistor R18
33
Install 5.1K Resistor R11
34
Install 7.5K Resistor R21
34
Install 750K Resistor R35
35
Install 100K Trimmer Potentiometer R47
35
Install 500-Ohm Multi-Turn Trimmer Potentiometer
36
Install 50K Multi-Turn Trimmer Potentiomers
36
Install Two 100Uh Inductors
37
Install 10Uf Capacitors
38
Install 220Uf Capacitor C47 (May be Supplied as 470Uf)
39
Install 30Pf Trimmer Capacitor C1
40
Install All BS170 Transistors
41
Install 2X3-Pin In-Circuit Programming Header
41
Install 4-Pin GPS Header
42
Install 3-Pin DVM/RF Detector Header
42
Install 1-Pin Test Points
43
Install Power Connector
43
Install 7805 Voltage Regulator IC11
44
Install Pin Headers for the LCD Module
44
Wind and Install Toroid L4
45
Wind and Install Toroid L2
47
Wind and Install Toroids L1 and L3
48
Wind and Install Transformer T1
49
Install RF Output BNC Connector
55
Install 3.5Mm Stereo Connectors
56
Install Buttons S2 and S3 (Left and Right Buttons)
56
Install Rotary Encoder
57
Install Microswitch
57
Install Gain Control Potentiometer R36
58
Install Four 12Mm Hex Spacers at the LCD Corners
59
Install Four 12Mm Hex Spacers at the PCB Corners
59
Install Knobs
60
Install 16-Pin Female Connector on LCD Module
60
Install Microcontroller
60
Install LCD and the Remaining 4 Screws to Bolt LCD Module
60
Connections for Off-Board Mounting of Controls
61
Connections for Basic Operation
62
Adjustment and Alignment
63
4 Operating Instructions
67
Overview of Features
67
Display Elements
69
Operator Controls
70
Tune Rate
70
Keyer Speed
71
Rit
71
VFO Mode
72
VFO A/B Frequency Swap
72
Frequency Presets
72
Automated Message Transmission Mode
73
Menu System
73
Saving Current Operating Parameters (VFO Frequency Etc)
74
Types of Configuration Menu Item
75
Editing a Configuration Menu Parameter
75
Editing a LIST Parameter
75
Editing a BOOLEAN Parameter
75
Editing a NUMBER Parameter
76
Editing a TEXT Parameter
76
Frequency Presets Menu
78
Messages Menu
78
VFO Menu
79
Keyer Menu
81
Decoder Menu
85
Beacon Menu
87
Other Menu
94
Alignment Menu
96
Test Equipment
100
5 Circuit Design
104
Block Diagram and Summary
104
Circuit Diagram
106
Synthesised Oscillator
106
Transmit/Receive Switch
107
Band Pass, Phase Splitter, QSD and Pre-Amps
108
90-Degree Audio Phase Shift
109
CW Filter
110
Audio Amplifier
110
Transmit Signal Routing and PA Driver
112
Class-E Power Amplifier
112
Low Pass Filter
114
Key-Shaping Circuit
114
Microcontroller
116
Optional GPS Interface
119
In Circuit Programming (ISP) Interface
120
Test Equipment
120
Voltage Regulator
123
6 Fault-Finding
123
Blank LCD or Blocked LCD
123
No Backlight at All
123
A Row of Blocks Appears on the Top Row
124
DC Voltage Readings
124
RF Power Output Check
126
Audible Continuous Clicking Noise During Receive
127
7 Measurements
127
Equipment
128
Transceiver Current Consumption
128
Transmitter Power Output
129
Class-E Power Amplifier Drain Waveform
130
RF Envelope Key-Shaping
130
Low Pass Transmitter Harmonic Output Filter Characteristics
131
Band Pass Receiver Input Filter Characteristics
131
Quadrature Sampling Detector Bandwidth
134
CW Filter Response
135
Unwanted Sideband Rejection
136
8 Operation Reference "Cheat Sheet
137
9 Resources
138
10 Document Revision History
138
Need help?
Do you have a question about the QRP Labs QCX 5W CW and is the answer not in the manual?
Ask a question
QRP Labs QCX 5W CW Specifications
General
Brand
QRP Labs
Model
QCX 5W CW
Category
Transceiver
Language
English
Related product manuals
QRP Labs QCX-mini CW
121 pages
QRP Labs QCX
52 pages
QRP Labs QCX-mini
52 pages
QRP Labs QDX
38 pages
QRP Labs QMX
90 pages
To Next PageTo Next Page
Need help?
General
