1. Introducció
This manual provides instructions for the Upgraded Fever 6J3 Tube Prestage Tone Board HIFI Class A Prebuffer Amplifier Kit. This finished pre-amplifier is designed to enhance your audio experience by buffering and amplifying low-level audio signals, reducing digital harshness, and introducing a warm, natural 'tube flavor' to your sound system. It features a DCDC boost circuit and offers approximately 5 times voltage amplificació.
Nota important: This product is an electron tube pre-amplifier board. It does not have power amplifier functionality and cannot directly drive passive speakers, horns, or headphones. It is intended to be connected between an audio source and a power amplifier or active speakers. It is not suitable for use in automotive environments.
2. Informació de seguretat
- Font d'alimentació: Use a DC 12V-16V power supply with a current of 1A or above. Ensure the voltage no supera els 16V.
- Entorn d'ús: Do not use this pre-amplifier in a car.
- Speaker/Headphone Compatibility: This unit cannot drive passive speakers, horns, or headphones directly. It must be connected to a power amplifier o altaveus actius.
- Cablejat: Always use shielded cables for signal connections to prevent interference, leakage sound, or noise.
- Distorsió: If you experience distortion, reduce the input volume appropriately.
- Manipulació de tubs: Ensure vacuum tubes are fully and correctly inserted before powering on.
3. Producte acabatview
The 6J3 Tube Prestage HIFI Class A Prebuffer Amplifier is an upgraded version featuring a DCDC boost circuit and 6J3 vacuum tubes. Its design is based on the principles of the classic American X-10 circuit, optimized for stable performance and enhanced tube output. It aims to transform the sound from digital audio sources, providing a sweet and natural 'tube flavor'.
Característiques principals:
- Approximately 5 times voltage amplificació.
- DCDC boost circuit for stable high voltage supply to tubes.
- Wide compatibility with various low-level audio signal inputs.
- Upgraded design suitable for different tube models (e.g., 6J3, 6A2, 6K4).
- Classe A amplification for improved vocal clarity and rich tube sound.
- Full-frequency output.
4. Configuració
4.1 Connexió a la font d'alimentació
El preamplifier requires a DC 12V-16V power supply with a minimum current of 1A. Compatible power sources include:
- Standard 12V-16V power adapters.
- 12V-16V storage batteries.
- 12V-16V switching power supplies.
Connect the power supply to the DC3.5/5.5*21 socket on the board.
4.2 Connexions d'àudio
Use shielded audio cables for all connections to minimize interference and noise.
- Entrada d'àudio: The left and right channel input terminals are for low-level audio signals. Connect your audio source (e.g., mobile phone, CD player, computer, TV, MP3 player) to these inputs.
- Sortida d'àudio: The left and right channel output terminals are designed to connect to a power amplifier or active speakers. This connection will provide the amplified, 'tube-flavored' audio signal to your main sound system.
4.3 Tube Installation (If not pre-installed)
Ensure the vacuum tubes are fully inserted into their sockets. Upon power-on, the tube filaments should glow red for proper operation.
5. Instruccions de funcionament
5.1 Encès
Once all connections are secure and the tubes are properly seated, connect the power supply. Upon power-on, the electron tube filaments will begin to heat up. The DCDC boost circuit will simultaneously raise the voltage. The unit will be ready for operation once the filaments are fully heated and glowing red.
5.2 Control de volum
El preamplifier features a volume control knob. Turn the knob clockwise until you hear a 'click' sound and the indicator light illuminates. At this point, the volume is at its minimum. Continue turning the knob clockwise to increase the volume to your desired level.
5.3 Filament Operation
The filaments of the two tubes are connected in series and supplied with 12V DC. This design helps to reduce noise and ensures a stable power supply for the tubes, preventing unwanted current noise.
6. Manteniment
- Neteja: Mantingueu la unitat neta i lliure de pols. Feu servir un drap suau i sec per netejar-la.
- Gestió de cables: Ensure all signal cables are shielded and properly routed to avoid interference.
- Tube Longevity: While tubes have a lifespan, proper operation within specified voltage limits and using a stable power supply can help prolong their life.
- Emmagatzematge: Store the unit in a dry, cool place away from direct sunlight and extreme temperatures.
7. Solució De Problemes
| Problema | Causa possible | Solució |
|---|---|---|
| Sense so ni volum baix | Incorrect connections, tubes not fully inserted, power supply issue, volume too low. | Check all audio and power connections. Ensure tubes are fully seated and glowing. Verify power supply is within 12-16V DC. Increase volume knob. |
| So distorsionat | Input signal too strong, faulty tubes, unshielded cables causing interference. | Reduce the input volume from your audio source. Check if tubes are correctly installed and functioning. Use shielded audio cables. |
| Humming or noise | Unshielded cables, ground loop, power supply interference. | Ensure all signal cables are shielded. Try a different power outlet or power supply. Check for proper grounding. |
| Missing high or low frequencies | Issue with audio source or connected amplifier/altaveus. | Aquest pre-amplifier provides full-frequency output. If frequencies are missing, check your audio source and the connected power amplifier/altaveus actius. |
| Tubes not glowing | Tubes not fully inserted, faulty tubes, power supply issue. | Ensure tubes are pushed all the way into their sockets. Check power supply voltage. Replace tubes if necessary. |
8. Especificacions
| Característica | Especificació |
|---|---|
| Tipus de producte | Electron Tube Pre-amplifier Board (Finished) |
| Dimensions (L x A) | 87mm x 75mm (excluding locator/knob) |
| Electron Tubes | Standard 6J3 (compatible with 6A2, 6K4) |
| Font d'alimentació | DC 12V-16V, 1A or above |
| Voltage Amplificació | Aproximadament 5 vegades |
| Resposta de freqüència | 5Hz - 500KHz |
| Sensibilitat | Up to effective 3V without distortion |
| Amplification State | Classe A |
| Tipus de circuit | DCDC Boost Circuit |
| Tipus de sortida | Full-frequency output |
9. Consells d'usuari
- Qualitat del cable: Invest in high-quality shielded audio cables to minimize potential noise and interference, ensuring the best sound reproduction.
- Seients de tub: Always double-check that the vacuum tubes are fully and securely seated in their sockets. A loose tube can lead to no sound or intermittent issues.
- Gestió del volum: Start with the volume knob at its minimum setting and gradually increase it to avoid sudden loud sounds or distortion, especially when connecting new audio sources.
- Estabilitat de la font d'alimentació: Use a stable and clean DC 12V-16V power supply. Fluctuations can affect sound quality and component longevity.
- Integració del sistema: Remember this is a pre-amplifier. It requires a separate power amplifier or active speakers to produce audible sound. Ensure your downstream equipment is correctly connected and powered.
10. Garantia i Suport
For warranty information, technical support, or any questions regarding your 6J3 Tube Prestage HIFI Class A Prebuffer Amplifier, please contact the seller directly through your purchase platform. Keep your purchase records for reference.
