NORCAL NC2030 Manual page 6

Figure 85. Picture of detector and RF front end with parts installed. Note trim cap orientation and
jumper on JP3! .................................................................................................................................. 71
Figure 86. Detail on T1. Two turn # 32 to pads 1 & 2. Main winding connect to pads 3 & 4. ............. 72
Figure 87. L2 leads formed to prepare for surface mounting on the top of the through hole pads
provided. ........................................................................................................................................... 72
Figure 88. Location of Audio Preamp and Phasing sections .................................................................... 74
Figure 89. Close up of Audio Preamp and Phasing sections .................................................................... 74
Figure 90. Component alignment of U4, and U5. Note C30, R22 locations ........................................... 75
Figure 91. General location of the Audio 750 Hz LPF............................................................................ 76
Figure 92. Close up of the 750 Hz Audio LPF section............................................................................. 77
Figure 93. Component placement and alignment of U7 and polarization of caps C47, C48, C49........... 77
Figure 94. General location of the Transmitter section ............................................................................ 79
Figure 95. Close up of the transmitter section portion.............................................................................. 79
Figure 96. All transmitter parts except for the inductors. Note TS912 orientation, BS170 flat side
orientation. ........................................................................................................................................ 80
Figure 97. L19 mounted. 3T tap location shown. ................................................................................... 81
Figure 98. Location of U9 and pins voltages to check. In receive mode, check, U9 pins 11 (0v), 12 &13
(2.9v)................................................................................................................................................. 82
Figure 99. Location of U15 between AFA and Keyer chips. Test pins 11, 12, and 13 ........................... 83
Figure 100. Location of R95 and R96. Voltages on transmit/receive switches....................................... 84
Figure 101. Mount all four corners of the main board using the mounting hardware as shown. ............ 85
Figure 102. NC2030 with all front panel hardware mounted in prototype chassis. Case will be silk
screened............................................................................................................................................. 85
Figure 103. Mount the paddle jack. ......................................................................................................... 86
Figure 104. Mount the headphone jack..................................................................................................... 86
Figure 105. Add Keyer button (upper left), AFA button (lower right).................................................... 87
Figure 106. Mount the volume control pot (upper right) and the spot switch (lower middle). ................ 87
Figure 107. Another view of the spot switch. The two terminals are orientated in the "up" position. .. 88
Figure 108. Add keyer speed pot, SCAF Pot, and RIT pot. .................................................................... 88
Figure 109. Rear panel of prototype NC2030. Final case will be silk screened....................................... 89
Figure 110. Antenna jack added .............................................................................................................. 89
Figure 111. Rear power connections: Power switch, leads to rear switching supply, power jack (not
shown)............................................................................................................................................... 90
Figure 112. Power jack connections, +12v to power switch (red wire) and ground (green) to JP2 ground
pad..................................................................................................................................................... 90
Figure 113. Placement of the switching supply tin on the back chassis, power jack not installed........... 91
Figure 114. Place the switching supply board in the tin, center it top & bottom, and mark the mounting
holes .................................................................................................................................................. 92
Figure 115. Connect the power wires to the switching supply in the color order shown......................... 93
Figure 116. PTO L13 mounting detail. Coil connections shown. Front PTO coil wire must connect as
shown. ............................................................................................................................................... 93
Figure 117. Connections for the PTO coil L13......................................................................................... 94
Figure 118. Front side of the PTO coil (prototype chassis) showing epoxy ridge from the front side .. 94
Figure 119. Tuning knob with PTO screw partially inserted................................................................... 95
Figure 120. PTO brass screw full inserted into the PTO coil .................................................................. 95
Norcal NC2030 v5 12-18-05
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