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Figure 58. Proper orientation of U8, D2, and D3
Install the parts in this section in the following order:
U8 - CD74HC4051M
- Caution! Double check installation polarity as shown above!
Solder one corner pin,
double check polarity, then solder the rest of the pins.
R46 - 47K
R51 - 100K
R47 - 1M
R53 - 50K trimmer pot
D2, D3 - DL4007 – Hint: Pre-tin the ends before installing
- Caution! Double check installation polarity as
shown above!
D4 - MMBD4148
Q2 - MMBF5486
C63 C65 - 47pF
C50 C51 C66 C67 - 0.1uF
C62 - 1000 pf
L8 - 47 uH
20m only parts:
(Update – use 10K or better
R55 – Jumper using a short wire. Zero ohms is needed here for 20m.
yet would be to replace this with a user supplied 470 ohm resistor)
C54 - 5 pf
L5 - 10 uH
X1 - 11.059 MHz Crystal
30m only parts:
R55 - 10K
C54 - 7.5 pf
Norcal NC2030 v5
12-18-05
Page 53 of 128
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