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SA7—7
Installation of C6 and R6. The style of these components might be new to you, but don't be concerned. We'll
get them in right. Having installed all the conventional resistors according to color code, note that the
remaining resistor-like part is marked with 6 bands; the first two at one end should both be red. This is the
2.2 pF axial capacitor. Install it between Q1 and R3, taking care that the capacitor body is as close as
possible to the PC board.
13. C6, 2.2 pF capacitor installed.
Resistor R6 is, for many of us, Ramsey Electronics' mandatory crash-course in SMT("Surface Mount
Technology") components. It is used in the emitter-to-ground lead of Q2 instead of an ordinary resistor to
minimize the possibility of self-oscillation. After you install it correctly, consider yourself a step beyond the
1995 edition of the ARRL Handbook, which simply shows how many SMT parts can gather on a dime and
states that the "how to" is beyond the scope of the book!
Tools recommended for installing R6:
Tweezers
Magnifier
Low-wattage, very clean and well-tinned soldering tip.