© QuartSLab 2009

Quartz Crystals

Parallel

     

      R1 100K
      R2 33K
      R3 See below
      C1, C2, C3 See below
      C4 . 01F
      C5 47pF
      VC 60pF Trimmer
      TR1 BC108 or similar

Frequency X1 in MHz

R3

C1

C2

C3

0.95 - 3.0

3.3K

220pF

220pF

not used

3.0 - 6.0

3.3K

150pF

150pF

33pF

6.0 - 10.0

2.2K

150pF

150pF

33pF

10.0 - 18.0

1.2K

100pF

100pF

not used

18.0 - 21.0

680 ohms

68pF

33pF

not used

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