NT7S Code Practice Oscillator BOM
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C1, C2, C3, C4, C5, C8		100 nF
C6, C7, C9					10 uF electrolytic (16 V or greater)
D1							LED of your choice (optional)
J1							1/8" mono phone jack (can use stereo jack if necessary)
J2							1/8" stereo phone jack
R1, R2, R4					3.3k
R3							560
R5							10
R6							10k trim pot (5k work fine as well)
R7							150k
R8							100
R9							1k (optional)
S1							SPST swtich
Q1, Q2						PN2222A (or 2N3904, 2N4401, etc.)

Other stuff you will need
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9V battery clip
Sheet of copper clad (2" x 1.5")
Manhattan pads
Enclosure (Altoids tin works great)