Figure 12 Non-Polarised Capacitors; Figure 13 Lpf Capacitor Marking - ozQRP MDT Construction Manual

Step 6: Non-polarised capacitors
Note the various types as per the examples shown in Figure 12. Ceramic disc NPO, standard
ceramic disc, polyester MKT and ceramic multi-layer chip capacitors (MLCC). These are all non-
polarized and can go in either way. There are 14 x 100nf (0.1uF) MLCC and as they are quite
small install these first.
Step 7: Low pass filter capacitors
These look like 0.1uF MLCC types, so don't get them mixed up.
Figure 13 shows how to identify the LPF capacitor markings.
Capacitor
C24
C23
C25, C26, C27
MDT Construction Manual – Issue 2

Figure 12 Non-polarised capacitors

Marking
151
221
471

Figure 13 LPF capacitor marking

Value
150pF
220pF
470pF
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