NORCAL NC2030 Manual page 3

PTO tuning for the 30m version (2.850 to 2.900 MHz) ....................................................................... 98
Mixer/LO Amp Gain selection ............................................................................................................. 98
RF front end tune up ........................................................................................................................... 100
Opposite sideband suppression ........................................................................................................... 102
Setting RX/TX offset .......................................................................................................................... 104
Transmitter Test ...................................................................................................................................... 106
Operating the NC2030 ............................................................................................................................ 106
Principles of operation ............................................................................................................................ 109
Transceiver Block Diagram ................................................................................................................ 109
Receiver .............................................................................................................................................. 109
T/R switch....................................................................................................................................... 109
Detector/ AF pre-amp ..................................................................................................................... 110
Phasing strip.................................................................................................................................... 113
R/C Audio Filter - Low pass .......................................................................................................... 114
R/C Audio Filter - High pass.......................................................................................................... 115
Audio Amplifier, Mute Switch & Audio Limiter ........................................................................... 116
SCAF Variable Low Pass Filter & Headphone Drivers ................................................................. 117
PTO Circuit..................................................................................................................................... 118
VXO Circuit (20m - 11.059 MHz, 30m - 13.0 MHz) .................................................................... 118
LO Mixer and IF Filter ................................................................................................................... 120
LO IF amp and Phase Splitter......................................................................................................... 120
Transmitter.......................................................................................................................................... 121
Class E PA finals ............................................................................................................................ 121
CW Waveform shaping................................................................................................................... 122
High Voltage/High Current PA protection ..................................................................................... 122
AFA Frequency Counter Instructions..................................................................................................... 122
Introduction......................................................................................................................................... 122
Counter Modes.................................................................................................................................... 122
Mode ............................................................................................................................................... 123
Digits Announced ........................................................................................................................... 123
Counter Usage..................................................................................................................................... 123
Keyer Instructions................................................................................................................................... 124
List of Figures
Figure 1. Working over an oversized cookie sheet is highly recommended to catch stray surface
mounted parts.................................................................................................................................... 13
Figure 2. A temperature controlled soldering helps a lot. 650 to 700 degrees is recommended............ 13
Figure 3. A very pointed soldering iron tip is a very big help for small surface mounted components.. 13
Figure 4. Headband Magnifiers. "Mag-eyes" from JoAnn Fabrics ......................................................... 14
Figure 5. Parts in bag pockets are accessed via slit cut into the packet just larger enough to get the part
out. .................................................................................................................................................... 15
Figure 6. Close up of a surface mount parts strip and the bag slit just large enough to access the strip. . 15
Figure 7. A sample bag pocket layout diagram vs. a real bag of parts. ................................................... 16
Norcal NC2030 v5 12-18-05
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