Monday, July 10, 2017

How output transformer impact the sound of tube amplifier

How output transformer impact the sound of tube amplifier

Output transformer used in HIFI tube amplifier is a key component in high-fidelity audio equipment.

Tube power amplifier circuit is very simple relatively, but if you use output transformer that is produced by different manufacturers to make tube amplifier, the difference of sound is great. When output transformer in the transmission of audio signals, there will be eddy current, hysteresis, magnetic flux leakage and wire resistance loss, while the coil there is impedance, inductance and capacity resistance. These unfavorable factors will also be changed with the frequency of the audio signal changes. Therefore, the quality of the output transformer is related with its core material, quality of its core, enameled wire, winding method, size of the core air gap and so on, those directly affect the sound quality and quality of tube amplifier.

If output transformer output quality is not good, the biggest drawback is large distortion, narrow frequency response, high frequency and low frequency extension is insufficient, midrange is ambiguous, it sounds like tremble can’t achieve high frequency, bass is no powerful, orchestral instruments mixed together , There is no sense of hierarchy, the ensemble is heard is a noisy sound.

Therefore, sound quality is a decisive impact output transformer.

For tube power amplifiers, because loudspeaker is a low impedance element, the power of the high output impedance of tube must be transferred to a low impedance loudspeaker by some means. Usually use audio output transformer, which must be high quality, otherwise we try to improve the quality of amplification will come to naught.

There is a video that is 300B Vacuum Tube Amplifier, which is used IWISTAO Amorphous 8C Core Output Transformer.

Here, we provide you some high quality output transformers for you DIY your tube amplifier. The output transformer adopt core of Japan Z11(0.35EI) annealed silicon steel dedicated audio sheets, high quality oxygen-free copper wire coil package, and use pure pulp insulating paper between each insulated layer. Production process of output transformer defying cumbersome, adopt 2 out 3 clips or 4 out 5 clips method with hierarchical segmentation, placing paper with group by group, also with processes of meticulous, careful winding, vacuum impregnation, these lead to the transformer has good insulation and moisture resistant, transparent sound, sweet warm and mellow, excellent solution and clarity, as well as nice shape.

It is a better choice to tube amplifier audiophiles.

Friday, July 7, 2017

A Heaven-made Match Tube FM Tuner Plus 6P1 Tube Amplifier

A Heaven-made Match Tube FM Tuner Plus 6P1 Tube Amplifier
It is a finished tube FM tuner, whose tubes have been located on the same board, so it looks compact and elegant.And, it used 6N3 as a high-level and mixing, 6C11 as the unit local oscillates, IF amplification as 6J4 together with 5pcs mid cycle inductance, and it has the advantages of high sensitivity, low noise. After stereo decoded by TA7343AP, then the signal will be amplified by tube 6N2 as a preamplifier. 

Its casing is made of whole aluminum metal chassis, gold with rushed oxidation treatment, and the front panel with 8mm thick aluminum plate, the others with 4mm aluminum one. On the front panel, there are dual level meters to display audio signal level, and the digital frequency meter display FM reception frequency. Electronic tube with a modern digital frequency meter that is complementing each other with nice, classical and elegant style, maybe the frequency display board of the wireless receiver is the designer's wisdom. The lower right corner of the unit has a knob to manually tune the radio. All tubes are exposed at the top plate for heat dissipation purpose, and equipped with cat eye indicator there. The whole structure of the tuner is compact, components layout had been optimized to be more reasonable.

IWISTAO Tube FM Tuner + 6P1 Tube Amplifier

IWISTAO HIFI 4 Inches Full Range Speaker

After connected with a power amplifier and speakers, you can listen to tube taste with music sweet and mellow. Here we connected it with a tube amplifier with tubes 6P1, and HIFI 4 inches full range speakers above.
 More detail, please visit,

IWISTAO Finished Tube FM Stereo Tuner Whole Aluminum Chassis