Table Of Contents - NORCAL NC2030 Manual

A Bit of History and Recognition ............................................................................................................... 8
Specifications............................................................................................................................................ 10
Receiver ................................................................................................................................................ 10
Transmitter............................................................................................................................................ 10
Building the Kit......................................................................................................................................... 12
Things you will need............................................................................................................................. 12
Parts List ............................................................................................................................................... 14
Tools and Construction Hints ............................................................................................................... 21
Power Supply ........................................................................................................................................ 23
Switching Regulator Tests .................................................................................................................... 29
Main Board Temporary Power Connections ........................................................................................ 30
Main Board 3v and 5v Regulators ........................................................................................................ 31
3v and 5v LDO Regulator Tests ....................................................................................................... 35
HPF, Audio Amp, Mute, Audio Limiter and Headphone Drivers........................................................ 37
Audio Section Partial Tests............................................................................................................... 39
SCAF Variable Low Pass Filter............................................................................................................ 39
SCAF and Additional Audio Section Tests ...................................................................................... 40
CW Keyer ............................................................................................................................................. 42
Audio Frequency Annunciator.............................................................................................................. 44
Adding external controls for functionality tests.................................................................................... 45
Keyer, AFA and Additional Audio Section Tests ............................................................................ 51
VXO and T/R Offset............................................................................................................................. 52
AFA RF Buffer and Phase Splitter ....................................................................................................... 55
Band Specific Parts ............................................................................................................................... 56
VXO and AFA Buffer Tests ................................................................................................................. 57
LO Mixer and PTO ............................................................................................................................... 59
LO Filter and LO amp........................................................................................................................... 67
First time LO filter tune up ............................................................................................................... 69
Quadrature detector/front end filter ...................................................................................................... 70
Detector Tests ................................................................................................................................... 73
Audio Pre-amp and Audio Phasing....................................................................................................... 74
Audio Pre-amp and Audio Phasing Tests ......................................................................................... 76
Main Audio filter .................................................................................................................................. 76
Main Audio Filter Tests .................................................................................................................... 78
Transmitter............................................................................................................................................ 79
Transmitter Tests .................................................................................................................................. 82
Mounting into the case.......................................................................................................................... 85
Bolt down the PC board.................................................................................................................... 85
Add front panel hardware ................................................................................................................. 85
Add rear panel hardware................................................................................................................... 89
Receiver alignment section ................................................................................................................... 96
LO Filter tune up............................................................................................................................... 96
PTO Frequency Alignment ................................................................................................................... 97
PTO tuning for the 20m version (2.941 to 3.006 MHz) ....................................................................... 97

Table of Contents

Norcal NC2030 v5 12-18-05
Page 2 of 128