Company lead by Rumen Atarski, apart from their own products, works also as an OEM manufacturer of fantastic, aluminum chassises for several high-end brands. One of such companies is a Bulgarian high-end manufacturer of electronics, but also loudspeakers, Thrax Audio. Many companies from behind Iron Curtain today are recognized an appreciated all over the world, and their products find more and more happy owners and fans. Fortunately, as Heraklitus said, panta rhei. It can be configured as a 1:9 or 1:18 ratio and is also a lower cost option.More and more interesting devices come to us from countries that, not that long ago, seemed to have nothing to offer for audiophiles, and today, to many people's of the West surprise, these countries deliver some widely appreciated products. Type 1495 is provided for customers who want a high ratio transformer which can be used when feeding a high impedance input (like a valve grid). Provides the ultimate in cancellation of quantisation noise. These are subtracted by the transformer which Which may be used in parallel driven from one DAC or may be used with twin DAC'sĬarrying out of phase signals. It has has a twin bifilar primary windings Type 1465 is designed for most popular applications. Internal electrostatic shields are provided to minimize noise pick-up. Transformers are constructed on Mumetal (76% Nickel) cores for minimalĭistortion and contained in heavy gauge Mumetal screening cans. Techniques are used to maximize bandwidth and transient response. Most Digital to Analogue Converters (DAC's). PRODUCT OFFERING: We offer a range of transformers suitable for Magnetisation (flux density) is proportional to the applied voltage and inversly proportional to frequency. This is because ac current flowing into the primary is always accompanied by an equivalent current out of the secondary so it does not cause magnetisation of the core. Increasing the current into the transformer does not cause the core to saturate. This will enable increased output power from the transformer to drive the load. PARALLED DACS: Multiple DAC modules can be wired with the iout terminals in parallel to increase the current into the transformer. The value of the I/V resistor as seen by the DAC (the reflected secondary load) can be calculated by dividing by the ratio squared. It should be apparent that it is possible to adjust the I/V resistor and transformer ratio to get a different output voltage but it should be born in mind that most DACs work best with a low I/V resistor. NOTES: This will work well provided the secondary feeds a high impedance such as a valve grid. We have to allow for some insertion loss in the transformer, about 20%. So if the ratio is 1:10 the output current is 1.4 / 10 = 0.14 mA rms. If the output current pf the DAC is 4 mA p-p, This is 4 x 0.354 = 1.4mA rms. This example assumes the input impedance of the amplifier is high.įirst calcualte the primary rms current. We recommend using a resistor across the secondary of the transformer. Analog voltage out DAC's cannot be used with 1465 or 1495. The I/V resistor (Rsec) should be connected across the secondary of the transformer as shown. It is important not to conect the amplifier ground to the digital ground of the CD player. The internal electrostatic screen should be connected to analog ground.
Sowter it trannys audionote dac series#
The secondary windings should be wired in series and connected between the amplifier grid and ground. The Iout + and - should be disconnected from the existing circuit and conected to the primary. two transformers are required for stereo.
Sowter it trannys audionote dac how to#
The schematic below shows how to connect type 1465 to a CD player. There are 3 reasons for this:ġ.The usually rather poor operational amp chips which are fed by the I/V resistor are eliminated.Ģ.The digital and analogue grounds can be isolated which can remove some complex distortion mechanisms.ģ.The unique frequency characteristics of the transformer can provide improved filtering of the quantization noise. The sound quality of almost any commercial CD player or digital music systems can be improved by the use of a transformer to perform the current to voltage (I/V) conversion. SOUND IMPPROVEMENTS USING DAC TRANSFORMERS
0 kommentar(er)
