FX 146
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B3. Install R108, 2 ohm (red-black-gold).
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B4. Install C33, .01 uf disc capcitor (marked .01 or 103).
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B5. Install C41, .1 uf disc capacitor (marked .1 or 104).
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B6. Install C34, 470 uf electrolytic. Watch out for correct polarity.
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B7. Similarly, install C29, 330 uf electrolytic.
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B8. Install C37, .01 uf disc capacitor (marked .01 or 103).
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B9. Install NPN transistor Q6. Be sure to have identified it correctly as
one of the five 2N3904 transistors used in your kit, (not one of the
2SC2498 RF transistors) and be sure to orient the flat side as illustrated.
Before soldering, press the transistor as far into its 3 holes as
reasonably possible.
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B10. Install R109, 47K (yellow-violet-orange). Note that this is another of
numerous vertical installations of resistors. The body of such resistors
should be snug against the board at the designated hole, with the other
wire neatly looped into the other hole without needless excess.
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B11. Cut three 8" lengths of hookup wire (or 8" of 3 conductor wire) to
connect the Volume Control to the three points designated on the PC
board. Strip and tin all six ends, referring back to Stage A instructions if
necessary or helpful.
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B12. Refer to the drawing
and correctly interconnect
the Volume Control's
three lugs to the 3
connecting points on the
PC board.
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B13. Use two 8" lengths
of hookup wire (or 8" of 2 conductor wire) to prepare the Speaker
Cable. Neatly strip and tin all 4 ends as in Step B11.
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B14. Solder both wires of one end of this speaker cable to the two
marked points near C37.
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B15. The other two ends of the speaker cable may be connected in any
of the following ways:
Standard:
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To J2, the 3.5 mm miniature speaker jack. The
3.5mm miniature jack is the larger of the two
miniature jacks supplied with your kit.
SPEAKER JACK
OUT
GND
IN
OUT
GND
FX PCBOARD
FUSE
PWR
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at the factory have tried to help by grouping similar or related parts in
individual sealed bags. Sorting organizers popular among kit builders
include empty egg cartons, muffin tins, small box tops, or the corrugated
edges of box cartons. Since the assembly of this kit is presented in
distinct stages, some builders may prefer to group their parts by stage
before beginning assembly.
11. HELPFUL HINT: Many of the parts are supplied on tape strips cut from
bulk reels. Leave them taped, which keeps them nicely sorted for you. It
is NOT necessary to pull the entire lengths of both leads from the tape.
Simply nip the leads right at the edge of the tape, and you'll have plenty
of length to work with.
12. The .01 disc capacitors may be marked in any of the following ways: .01,
103 or 10n (nanofarads)
13. Similarly, .001 ufd. discs may be marked: .001, 102 or 1n(nanofarads)
14. The several .1 uf units required should be clearly recognizable and
often will have a rectangular rather than disc shape. Their markings
may be .1 or 104.
15. Small Picofarad values are clearly stamped on capacitor bodies. 100 pf.
units may be marked 100 or 101.
16. We tried to make it clear in both lists and assembly steps that some
components can have a RANGE of acceptable values, even though a
single value is indicated on the schematic, the control document for this
project. A rule of thumb is that a value within 10% of the stated value will
be fine: 2 or 2.2 pf, 4.7 or 5 pf, 200 or 220 ohm and so forth. 10 uf
electrolytics may be 4.7 to 10 uf. Remember that there's a reason for the
"tolerance" codes for all parts. Unless we scream in bold print that
something must be exact down to the last micro-henry, ohm or partial
picofarad, PLEASE assume the 10% rule in sorting through your kit
parts!
17. Manufacturer stamping patterns can vary, and we sometimes need to
use simple logic and deduction to identify parts, particularly the
extremely common ones. For example: if your kit includes 3 identical
transistors with no apparent body marking at all, you may presume them
to be the 3 PNP transistors described as 2N3906, 228256 or equivalent.
18. Check your manual or kit package for any insert page advising that a
part identification or physical description has changed. We cannot
control how manufacturers may vary their product codes or colors of
plastic.
19. Observe correct POLARITY when installing all diodes and electrolytic
capacitors!
20. Please review No. 1 above!
