We rely on you to know already what a resistor, transistor, lC
"chip" and other common electronic parts "look like."
REMINDER
: Both the back and inside front covers of this manual
provide some light-hearted help on basic parts identification.
Each assembly step provides useful help in identifying any part,
whether by shape, color-code, manufacturer's markings, or other
description.
Since correct parts installation is the key to this Receiver working
perfectly, we encourage you to refer to the following Parts
Identification Notes whenever you feel it necessary.
Table 1-A
RESISTORS:
The Main Board uses only 1/4-watt resistors, while the Display Board uses
smaller 1/8-watt resistors packed in the bag with the Display Board itself.
Each instruction step lists the first THREE color bands, assuming the fourth
band to be gold (5% tolerance). Just be careful about that third "multiplier"
band. For example, your kit uses 4.7, 47, 470, 4.7K and 47K resistors, each
for very different purposes.
Table 1-B
MOLDED INDUCTORS
(also called "CH0KES").
These parts are readily recognized because:
1. They are packed with other coils, transformers,
etc.
2. While similar to resistors, they have "bullet"-shaped ends.
3. The body consistently has a green-bluish color.
While these parts follow the resistor color code chart for value identification, we
will be the first to agree with you that these color bands really can be
HARD
to
read.
EXAMPLE
: red, orange and brown can each look like some shade of mud.
NO, your eyesight is NOT the problem!
We suggest:
1. Sort all the inductors by quantity required in the Parts List.
2. Set aside (and mark on paper) those which are completely clear to you.
3. Compare PAIRS of bands and pay close attention to the 3rd (multiplier) band
4. A "Process of Elimination" is the easiest way to resolve questions.
1254
±
Getting Started
±
15
F. Model 1254 Receiver
Parts ldentification Notes
Содержание SSB-CW-AM
Страница 25: ...1254 Assembly 4...
Страница 34: ...Phase 2 0 Assembly begins on page 14 1254 Assembly 13 This space is for your notes...
Страница 35: ...1254 Assembly 14 Phase 2 0 Schematic Diagram Details...
Страница 46: ...This space is for your notes Phase 3 0 Assembly begins on page 26 1254 Assembly 25...
Страница 47: ...1254 Assembly 26 Phase 3 0 Schematic Details...
Страница 57: ...1254 Assembly 36 Phase 4 0 Schematic Details...
Страница 68: ...1254 Assembly 47 This space is for your notes...
Страница 69: ...Phase 5 0 Schematic Details 1254 Assembly 48...
Страница 77: ...Phase 6 0 Schematic Details 1254 Assembly 56...
Страница 93: ...1254 Assembly 72 This space is for your notes...
Страница 101: ...Figure 3R Model 1254 Block Diagram 1254 Reference 8...