Ten-Tec SSB-CW-AM Instruction Manual page 33

About the Circuit Board Drawings:
The sectional circuit board drawings are adapted directly from
the silk-screening on the board itself, but they have been
modified in two important ways:
1. Component "designators" (C1, R1, Q1, etc.) are consistently
within the outline of the part for maximum convenience in
identifying a part's real location. On the board itself, many such
designators are off to the side , tor two reasons. First, screening
over plated holes is not good manufacturing practice. Second, it
helps to see some clear designators AFTER parts-installation is
finished.
2. USEFUL NOTES AND SKETCHES have been added to the
sectional board drawings. As needed, we refer to these in the
Assembly Instructions.
The Quick-Reference Summaries
A Quick Reference Summary of the parts used in each Assembly
Phase is printed at the beginning of the instructions for that
phase. It may be used first as a guide to gathering parts for this
phase. It is provided as an extra help in double-checking
correctness of parts values with brief notes on the function of
each part. These summaries are adapted from the complete
Component Reference Index in the Reference Section of this
manual.
Main Board Soldering Hints
In addition to all our nagging about avoiding solder bridges,
here's a tip about working with this double-sided board with
plated-through holes. Many of the solder pads are elongated
with two or more holes. When soldering a part to such a multi-
connection pad or connected group of pads, just be careful to
use the minimum solder needed for a good connection, because
it is VERY easy for excess solder to flow into an empty hole.
Such extra solder must be "de-soldered" before using that
mounting hole.
We discourage those "l know best" marathons in which "board-
stuffing" for this whole receiver might be done in a long evening.
BUT we do NOT expect you to insert, solder and trim just one
part at a time. We suggest inserting 3-5 parts, bending the leads
to hold them well, double-check, then solder and trim. In
choosing the kit-building experience, we are not trying to
outpace the robotic manufacturing processes used at TEN-TEC
and worldwide!
1254 Assembly - 12