❒18. Install R27, a 10K ohm resistor
❒19. Install R28, a 10K ohm resistor
❒20. Install D1, a 1N4148 type diode (orange body with black stripe). Make sure that the cathode end (with the stripe) is installed in the same orientation as where the “arrow” is pointing to the stripe of the diode symbol. The stripe of the diode is the same as the stripe on the layout.
❒21. Use the same procedure to install D2, another 1N4148 type diode. Make sure the band on the diode is in the same direction as the stripe on the symbol in the layout.
❒22. Install R57, a 180 ohm resistor
❒23. Install R55, a 100K ohm resistor
❒24. Install R81, a 1K ohm resistor
❒25. Install R56, a 1M ohm resistor
❒26. Install R80, a 100K ohm resistor
❒27. Install R85, a 100K ohm resistor
❒28. Install R53, a 1M ohm resistor
❒29. Install R50, a 100K ohm resistor
❒30. Install R62, a 100K ohm resistor
❒31. Install R84, a 10K ohm resistor
❒32. Install R38, a 100K ohm resistor
❒33. Install R45, a 10K ohm resistor
❒34. Install R44, a 220K ohm resistor
❒35. Install R39, a 10K ohm resistor
❒36. Install R37, a 10K ohm resistor
❒37. Install D8, a 1N4148 type diode (orange body with black stripe). Make sure that the cathode end (with the stripe) is installed in the same orientation as the “arrow” pointing to the stripe of the diode symbol.
❒38. Install D5, another 1N4148 type diode (orange body with black stripe). Again make sure the stripe is in the same orientation as shown.
OK, we have done our fair share of assembly up to this point. Now we will take a short break and check the work we have done up to this point. We have just completed the microphone amplifier sections of the circuit, and for the ease of assembly have completed some of the RIAA equalization for the phono amplifier.
We want to check our circuit for cold solder joints and possible solder bridges. Also check the diodes you installed for correct orientation. Then we will be