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Receive IF Amplifier
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Wind and install transformers T10 and T11. Each time a wire passes through the center of the
toroid, it is counted as 1-turn.
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Install the MPSH10 transistors at Q12 and Q13. These devices look similar to several of the
other plastic encased transistors. Make sure the correct pair is selected.
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Install diodes D5 and D6. Make sure the cathode ends (bar) are oriented correctly.
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Install resistors R30, R31, R32, R33, R34, R36, and R95.
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Install capacitors C18, C41, C44, C45, and C46.
Your PCB should look like that shown in the next figure.
Test - Connect a speaker or headphones to the "SPKR" jack. Apply power to the board.
Connect an antenna to the primary side of transformer T11 or to the right pad where C36 will
be installed. You should hear band noise, mostly static, at a very loud level.
- Figure 12 -
14
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