Cheap small bile machine for digital sound source ----- 6p15 amplifier

Cheap boecting machine for digital sound source, 6p15 amplifier Keywords: cheap and small machine for digital sound source The machine is only 6 components per channel, saving the power transformer, direct market power cylinder filter, power supply is full, the filament is specially supplied by small transformers. This boost input transformer is passive coupling, only voltage amplification, no power gain. Modern digital sound source, regardless of CD, VCD, DVD, MP3 signal output is not directly oriented laser sensor, but passenger D / A conversion, simulation amplification, frequency correction, and the emitter outputs 1VMS. The on-analog signal, so the machine is high-made than the transformer boost, add a level of power to enlargement to meet the gain requirements. The input transformer also has the effect of improving the number of code. This unit is unpapperacotic, such as a source of sound controlled, can add potentiometers at the input terminal. Two key points made, one is the use of input transformers. In order to ensure the performance of the whole machine, it is recommended to use the finished product. The model TF1QX10YY used in this machine, the impedance 600Ω: 75kΩ, frequency ring 300 ~ 3500 Hz, which is 0.02V ~ 0.8V (40 times). Such high changes are quite high on the transmission characteristics of the input transformer. The iron core uses a slope to achieve better frequencies, capacitance, and achieve better frequencies, reduce the leakage, capacitance to ensure the amount of incidents. This machine actually responds to nominal. The second is ground processing, the main direct rectifier filtering of the mains is high, often referred to as hot, and heat is not a casing, also known as suspension. The grounding end of the three transformers of three transformers in the filament is called cold ground. Heat with cold ground through 0.01U high-pressure capacitance, usually 0. O2μF / 1KV is connected in series to improve its safety reliability. Under normal circumstances, as long as the capacitor, the transformer is initially, the secondary is not broken (more than 1kV above the finished product), and there will be no problem. The 6P15 frequency characteristics are good, the price is cheap and easy to promote, using a triode connection, the output impedance can be appropriately reduced, about 2 × 1 W output power. The transfer machine is very simple, the cathode resistance is adjusted, so that IA is 30mA. Another resistance is to improve the frequency response of the transformer, prevent resonance, and its value can be asked at 270kΩ ~ 820KΩ, and the value will reduce the output. Experienced a charm reader may wish to try it. Jilin Wang Yinping 6p16 incense circuit:

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