99 In stock
HIFI Tube Preamplifier
3 times Audio signal Boosting Transformer Input Isolation 10K: 90K Permalloy Wide Frequency Response
Model No: WHFR-BV01A
The original designing purpose of this transformer is that there are many low-level signal sources on the market, such as mobile phones, Bluetooth receivers, MP3, tablet and other audio sources, after connect it with power amplifier, the sound quality is generally quiet, and there is not much sound field. To adjust the volume of amplifier to 2-3 o'clock, then just have a normal volume, this is because the signal driving ability of preamplifier is insufficient, and need the high gain (larger volume)from power amplifier to improve it, and still the sound quality is not satisfactory. This 3 times audio signal boosting transformer may help you solve the problem.
This 10K: 90K permalloy audio transformer, the primary-to-secondary voltage ratio is 1:3, which is not the actual volume increase ratio. According to the conversion formula of voltage ratio and decibel, it calculated dB=20log(U2/U1), so the actual boosted volume is about 9.5dB, the signal voltage of the preamplifier input can be increased by 3 times and the gain of 9.5dB can be achieved without affecting sound quality. It is not easy that the secondary impedance must be increased to match the input impedance of next stage. The output impedance of 90K ohms means more powerful driving capability. Such an excellent transformer is inseparable from an exquisite winding technology and high-quality iron core. Together with imported material, this excellent transformer is manufactured.
Suitable for microphone, CD, MP3, MP4, hard disk player, LP, multimedia audio input, the signal is boosted by the isolation transformer signal 3 times to the next stage.
There are 3 options
A. Single Transformer – only one piece transformer
B. 2 Transformer PCB – 2pcs transformers soldered on a PCB without shield cover
C. 2 Transformer shield – 2pcs transformers soldered on a PCB within shield cover
1. The transformer cover adopts 80% nickel-containing permalloy shield to effectively shield the external electromagnetic wave clutter and other interference. It is filled with high-hardness epoxy resin, and the appearance and excellent index parameters are set. A lot of good products.
2. This audio signal isolation transformer can be used as input, inverting, single-ended to balance, boosting voltage, step-down, passive preamplifier transformers, and has a good effect for boosting, amplification, and isolation .
3. The main effect can eliminate the digital taste sound, and can filter out AC noise interference caused by the equipment. Used in various professional HIFI preamps, the audio signal is isolated and used to achieve good results.
4. Professional winding method, multi-wire winding/rewinding and sandwich segment winding method on transformer wire and winding method to reduce leakage inductance and distributed capacitance, expand frequency response, plus copper foil shielding anti-interference.
1. Core material: 85% permalloy containing nickel
2. Shielding method: outer core copper foil shield
3. Frequency response: 30Hz~44KHz (-0.3dB)
4. Input maximum current: 10mA
5. Size: Diameter 48mm * Height 40mm
6. Weight: 0.18kg/pc
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