SAP15 use of the gallstone mixer amp
This paper describes the gallstone mixer, the use of high-frequency dual-triode 6 N3 do audio amplification, a distortion of small, high-frequency response, and high conversion rate, the advantages of large dynamic range.Power output level by the Japanese company is willing to three audio supervisor SAP15N / P, which is two complementary Darlington on the internal diodes with a bias. The tube also known as high-speed thermal reaction transistors, TRAITR tube, has high thermal stability.
Power output circuit for a typical OCL, and a constant current drive, SAP15N ② the first leg and foot SAP15P the ④ indirectly a 510 Ω potentiometers, for regulating the size of bias, thus adjusting the static-amp Current, the circuit of quiescent current 100 mA. Tube before class and after class between transistors by capacitive coupling.
Before a two-6 N3 respectively as voltage and power-driven zoom level, and then into SRPP circuit. To improve the performance of amplifiers, and the depth of the little negative feedback loop.
Using two power transformer power supply. A transformer capacity of 20 W, output DC 200 V, exchange of 6.3 V to 4 6 N3 tube power supply. Transformer can be used C-or E-core. Another transformer capacity should be more than 300 W, DC output voltage ± 45V, for transistor-level power amplifier.
