This manual introduces the characteristics of RAPHAELITE QQE03-12 push-pull kit, usage methods, precautions, etc.
The QQE03-12 push‑pull kit is designed for beginners who want a low‑cost, high‑quality tube amplifier. It uses a 6F2 (ECF82) pre‑amplifier tube and a QQE03-12 (FU‑17) power tube to deliver about 8 W of output in a compact chassis. The power supply employs a high‑quality transformer and a stabilized 200 V rail for reliable operation.
The manual walks you through receiving inspection, component placement on the double‑sided PCB, wiring of the power transformer and output transformer, and provides detailed troubleshooting for common faults such as blown fuses, filament failure, and distortion. It also lists upgrade options for tubes, rectifier tubes, capacitors and resistors, and includes contact information for technical support. This manual is written in Chinese.
| Output Power | 8W |
|---|---|
| Power Supply Voltage | 200V |
| Pre‑amplifier Tube | 6F2 (ECF82) |
| Power Tube | QQE03-12 (FU‑17) |
| Output Transformer | Fully enclosed push‑pull type |
Inspect the power‑transformer input wiring, verify the polarity of the high‑voltage capacitor, and ensure there is no short on the transformer secondary or rectifier pins.
The QQE03-12 power tube can be replaced with other early‑model tubes such as QQE03-12, 6360, or the domestic FU‑17.
Check the tube socket pin order, verify that the filament winding of the power‑transformer is not shorted, and ensure all solder joints are sound.