Ramsey Electronics FX-440 Manual page 68

used. We 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' II have
plenty of length to work with.
12. The .01 disc capacitors may be marked in any of the following ways:
.01, 103 or 1 On (nanofarads)
13. Similarly, .001 ufd. discs may be marked: .001, 102 or 1 n
(nanofarads)
14. The several .1 uf units required should be clearly recognizable, 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. 1 O uf
electrolytics may be 4. 7 to 1 O 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!
21. Use the extra spaces provided throughout this manual to write down
Assm. 8 FX-440