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Produced by 26LW6 × 8 OTL 80W mono power amplifier

So. While the output tube screen very red. You should immediately shut down. b, intermittent oscillation: parasitic vibration occurs intermittently, the current suddenly big suddenly small. c, tube working exception: where a child just too much current screen very red. At this point exchangeable output tube. d, B voltage output tube imbalance: This is because the upper and lower part of the DC output tubes are not equal, can be resolved by adjusting the negative bias. At this point the work of the state DC Department of commissioning has been completed barrier, the following exchange adjustment of status. Input sinusoidal input signal crossing and watch the output waveform Sa 0. Increase the magnitude of the input signal, the output power of up to 60-70W, sine-shaped distortion should not occur. 8Q load in the case of the total maximum output power. Knock for the 1.4-1.6A. The duration of this status screen too long can cause very red, so the test of time the maximum output state should be as short. Output near maximum output waveform began limiting,; * Cheuk Nang Kan Lei Zhuo mold [H Figure 5, the frequency characteristics of the maximum output power, \2 Technical parent stream one by one ● ● ● ■ ■ ▲ ■ - one by one ■ ■ ▲ ■ ■ r one. . ▲ ■ ■ rr. . A ▲ ■ ■ ■ rII ■ technical exchange ● ● ● lllfflIll1}} IIiIJ1ltI. f ∞ I a f, r},MBT Schuhe,, inch! an output power [w】 Figure 6 distortion characteristics,ugg boots spana, ... IIjjr1 large. At this point a small amount of negative feedback reduces lOk potentiometer resistance, gradually increasing the amount of negative feedback, and a small capacitor to the indirect (100P ~ 300P). 10kHz square wave input, the output of lW-lOW,ugg boots reduziert, observe the output waveform should appear overshoot or ringing. If there are overshoot or ringing, in the c Department access 100pF ~ 200pF capacitance. In 8f2, and then a load off 0O1BF ~ O. 8 store 1BF capacitance load resistance from the curve of output power stability of the test to adjust the capacitive load V4 cathode circuit 5k. q potentiometer, so that upper and lower pieces of the waveform simultaneously. If distortion device, it can either output 10W to the minimum distortion when the output power gradually increased from zero to carefully observe whether the oscillation adjustment to send Block Figure 2-I-190V output at the 5k. q hum elimination of potential, when the input signal is zero,mbt sandalen, the output that appears hum eliminated. After adjusting the potentiometer with a fixed replacement must also be consistent with the phase adjustment,ghd glätteisen, phase adjustment is through changes in 22gFt350V capacitor to complete. Change capacity, adjusting resistor to find the best combination of the best. With a lk. q resistor and a 10k. q potentiometer in series received at RN, the test before the age of the feedback potentiometer's resistance l0kQ raised the most - an odd ■ Phi 2 (Yo .--_. Dai-mouth the most high-■ {H3) output (W1 Figure 7lkHz harmonic distortion characteristics of the time. observe whether the self-excited circuit. for insurance purposes it is best to leave the load into l (x.Q then measured electrical characteristics of a four-figure 4 is lkHzd, signal (12.5W) in the frequency characteristics . Figure 5 is the maximum output power (8ow) frequency characteristics, between the 20Hz-50kHz, output rates are 80W. 100KHzH @ ~ out of power in the down 65W. aircraft's noise level is 0.13mV, 1W output when the SNR is 86.7dB, 80W output SNR 1057dB. noise is mainly the residual power supply hum component. 0.13mV noise, even for efficient coupling speaker sitting in the audience can not hear . maximum output voltage required for the 0.66V. Figure 6, Figure 7 is a distortion characteristics. test the properties of the cathode when the first of the V4's 5k,. q potentiometers and V9 ~ V12 gate circuit CB make appropriate adjustments, the balance of the circuit driving up and down. The output waveform is a negative upper and lower symmetrical Figure 8 with the output power curve from the curve, the optimal load resistance of the duo was 24f2 ~ 32f2. 6W load the aircraft kept the maximum output power for the 67W, 4n when 48W. This feature does not change with the amount of negative feedback. Figure 9 is the frequency characteristics of the machine output impedance and damping of the frequency characteristics. through the amplifier for the square wave response tests show that very stable amplifier. machine no signal when the power consumption 420W80WN out 840W. Reference: Journal of the \Deaf Life 1 ∞ 8 No. 2 ● ■ ■ ■ ■ 1J ● ■ ■ ■ 1J ● ■ 1 ● ● ● 1Ill1 ● _1 quote ¨ mouth-shirt ~ [% * stack Gu Zhi Xiao
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