Adds a Pyle PP444 Preamp to the Numark PT01
Parts needed:
–Pyle Pro PP444
-Hook-up wire for connections
notes:
-the 12V rechargeable battery mod is highly recommended for use with this preamp mod
-the rechargeable battery mod, which gets regulated by the PT01, will remove power supply noise injected into the preamp by unregulated 9V D cell batteries
-the rechargeable battery mod is not required if you only use the wall power supply (it is regulated by the PT01).
-Disassemble PP444
1. unbox pp444
2. remove 4 housing screws from the PP444 and remove cover
3. remove 2 PCB screws
4. remove 2 panel mount screws (screws by RCA connectors)
5. remove PCB from enclosure
-Connect Tonearm Wires to PP444 Input
6. On the PT01 PCB, unsolder tonearm wires from J8, J9, and J16 (L_in, GND, and R_in)
7. Solder these wires to the bottom side of the PP444 PCB. see pic_1_tonarm_wires_to_pp444
-Connect PP444 Output to Numark PT01 Input
8. On the PT01 PCB, remove the 4 mounting screws.
9. On the PT01 PCB, unsolder and remove capacitors C8 and C18. see pic_2_c8_c18, and pic3_c8_c18_removed
10. On the PT01 PCB, solder 3 new wires to the 3 locations shown in pic_4_PT01_input
11. On the bottom side of the PP444 PCB, solder these 3 wires to the location shown in pic_5_PP444_output
-Connect the 9V Power Supply of the PT01 to the PP444
12. On the bottom side of the PP444 PCB, solder 2 new wires to the location shown in pic_6_PP444_9V_power
13. On the bottom side of the PT01 PCB, connect these 2 wires to pins 2 and 3 of TE11. see pic_7_PT01_9V_output
-Quick Test Before Final Install
14. Reassemble the turntable (no need for screws) and test for functionality. Use the wall power supply to power the PT01.
-Final install
15. Hot glue all of the new solder points. This acts as a strain relief for the wires.
16. Reinstall the PT01 PCB with 4 screws
17. Wrap the PP444 PCB with electrical tape or polyimide (kapton) tape (see pic_8_PP444_tape). This is to avoid any potential shorts between the PP444 PCB, and the PT01
18. Set the PP444 PCB on top of the PT01 PCB (see pic_9_PP444_location),with the RCA connectors of the PP444 PCB facing the battery compartment.
19. Reassemble the turntable.
Extra credit:
-On the PP444 PCB, remove all of the large connectors (RCA, etc.). This is not required, but will make it much smaller. This will make step 19 easier.