Tube Power Amplifier 35W Push Pull is made using a tube and eventually compiled configuration push-pull amplifier. Tube Power Amplifier 35W Push Pull tube til it using EL-34 as the amplifier end.

Power amplifier with tubes often become the choice for a small slewrate so that the resulting audio quality is guaranteed. Tube Power Amplifier 35W in the circuit that is required to supply a high DC voltage is +220 VDC ddengan order to work properly.

This is a Circuits of fluorescent lamp with a power of 40 Watt - The ambit works abundant like the aboriginal Strobos. except that a beaming tube is used. Thus, the beaming tube zündbereit charcoal constant, the two electrodes of the tube are continuously agent Ta1 supplied with electricity.

This accepted makes the two attrition affairs of the afterglow tube in, so the mercury evaporates into the tube and the electron discharge is simplified. Ta2 Returns on the rectifier “D1-D4 , the voltage of the multivibrator, the agitation abundance of the tube is amenable for. The acceleration of the AMV is with potentiometer P1 set. The beating afresh passes through R3 to T3, is amplified there and controls the bent for the triac, the administering of these alternates. If so, afresh the ambit through the tube and the balance closes and the tube can ablaze up. 

The pulses of T3 additionally access via the capacitor C3 to the aboideau of the thyristor Th1. Simultaneously with the closing “of the ambit for the tube is Th1 -conductive and creates a abbreviate in the agitation braid accepted flow, which in about-face generates a aerial voltage on the secondary. This voltage of several thousand volts is now operational on anchorage J7 to a wire alfresco of the tube. The aerial voltage at the tube provides the all-important starting voltage so that it starts and can absolutely ablaze up until the thyristor Th1 locks again.

Part List:

C1/C2 2x  Elco standing 1μF/16V

C3 1x  Ker. Scheibenkondens. 0.1 μF

C4 1x  HV-capacitor 1μF 350V axial

C5 1x  Elko stand. 470μF 25 V

C6 1x  Poly condensation. 0.068 μF 630V

D1-4 4x  Diode 1N4001

D5 1x   Diode 1N4007

L1 1x  Ignition coil (such as the normal speed camera strobe)

P1 1x  Poti 6mm 2.2 M

R1/R4 2x  Resistor 470R 1 / 4 W

R2/R9 2X  Resistor 47K 1 / 4 W

R3 1x  Resistor 10K 1 / 4 W

R5 1x  Resistor 270R 1 / 4 W

R6 1x  Resistor 1.2 K 1 / 4 W

R7 1x  Resistor 22K 1 / 4 W

R8 1x  Resistor 120K 1 / 4 W

Si1 1x  Backup medium time 160mA

Si2 1x  A pair of fuse holders

T1/T2 2x  Transistor BC557B

T3 1x  Transistor BC547B

Ta1 1x  Transformer 2x 2x 5V 500mA 5VA

TA2 1x  Trafo 1,2 VA 9Volt

Th1 1x  Thyristor 4A 400V T0220

TR1 1x  Triac 4A 400V T0220

The credibility J1 and J2 to affix with the two electrodes on one ancillary of the beaming tube. The credibility J3 and J4 , affix with the electrodes on the added side. Now amplitude a attenuate insulated!! Wire forth the tube and cement it eg. Scotch band firmly. This wire carries the agitation voltage of several thousand volts to the tube so that they burn properly. This wire, affix one end with J7 on the board, while the added end charge necessarily be isolated. This wire leads except the aerial voltage pulses that is additionally voltage. The credibility with J5 and J6 of the lath is one, tube fitting, balance clamped to (choke, there’s the ablaze trading.) Finally there is the voltage at J8 and J9. Now it should somehow already beam or flash, with the potentiometer, the beam amount can be set. 

Amplifier circuit with IC STK is tough and good quality. In this article an amplifier circuit with IC STK another base. Power "Amplifier 200Watt By STK4050" is an audio amplifier of the STK family with 200Watt power. To create a power amplifier with the STK4050 IC is not require many external components.

Power Amplifier uses symmetric 30Volt power supply system. Power Amplifier With this STK4050 can reproduce the power 200 Watts at 8 Ohm load spaker. In making Power Amplifier 200Watt With this STK4050 do not forget to provide adequate heat sink for the IC STK 4050 in order to avoid overheating.

  The Type TDAl52l from Valvo/Mullard is an integrated HiFi stereo power amplifier designed for mains fed applications such as stereo TV The device works optimally when fed from a j 16V supply; and delivers a maximum output power of 2x12 W into 8 Q.
The gain of the amplifiers is fixed internally at 30 dB with a spread of 0.2 dB to ensure optimum gain balance between the channels. A special feature of the chip is its built-in mute circuit, which disconnects the non-inverting inputs when the supply voltage g is less than j 6Vj a level at which the amplifiers are still correctly biased. This arrangement ensures the absence of unwanted clicks and other noise when the amplifier is switched on or off. The TDAl52l is protected against output short circuits and thermal overloading. The SIL9 package should be bolted onto a heat- sink with a thermal resistance of no more than 3.3 K/W (R1.=8 Q; Vs: ;r 16 V; Pa=l4.6 W; Ta: 65 °C). Note that the metal tab on the chip package is internally connected to pin 5. The accompanying photograph shows that this high quality stereo amplifier has a very low component count, and is readily constructed on a piece of Veroboard. The following technical data are stated as typical in the data- sheets for the TDAl52l   

Distortion at Pa: 12 W:
0.5%
Quiescent current:
40 mA
Gain balance:
0.2 dB
Supply ripple rejection:
60 dB
Channel separation:
70 dB
Output offset voltage:
20 mV
3 dB power bandwidth:
20-20,000 Hz

Many of the readers have time and again requested for inverter circuits. Given below is one such system, rated at 150 watts, complete in all respects.
The circuit works automatically when mains supply fails and switches back to charging mode when the supply is resumed. A prototype of the same has been constructed by me and is in operation for  the last 4% years, power in a 122 cm (4 feet) ceiling fan and a tube light.  The circuit shown here may be divided into two sections: The first, charger section, includes step-down transformer Xl to provide l2V—0—l2V AC. When switched on through Sl, relay RLI gets energised by the DC voltage supplied by one set of full-wave rectifier comprising D3 and D4. This  rectified DC voltage smoothed by C1 is again brought down to the required RLl coil voltage through R2 and C2. When RL1 gets energised, it connects the mains live line to the output socket through RLl’s N/O contacts.  Diodes D1 and D2 form another set of full-wave rectifier which charges the battery through resistor R1 and the N/ C  contacts of relay RL2.

The value of Rl should be so chosen as to give the desired current level. lt is advisable to have two or three resistors in parallel, each rated 25W. A 20 ampere meter may be connected between the battery`s negative terminal (after the fuse) and the RL2’s main  contact to monitor the charging rate as well as the consumption during inverter operation. When the AC mains supply fails, relay RL1 gets deenergised and connects the live line of the secondary of the inverter transformer X2 to the output socket through its N/ O contacts. At the same time, RLl causes RL2 to operate  through its N /C contacts. (lt is assumed that S2 is in on position.) ln this circuit the transistors operate as switches. Resis tors R3 through R6 are used to provide the requisite base drive through the feedback winding for starting the oscillations. , Slight imbalance in the two halves of the primary winding of X2 as well as in the component values, causes one set of transistors to conduct. Say, for example, T1 is conducting  while T2 is off thus the supply to the top half of the primary winding through the RL2 contact  (Of course it is assumed the mains supply is off and that switch S2 is in ON position) When T1 is in full Conduction, heavy current flows in the transformer which saturates the core causing the magnetic field to collapse as also the polarities of all the windings in X2 to reverse and also the switching positions of the transistors too. Because of the auto-transformer action, a potential of twice the supply voltage is developed across the total primary winding of X2, which is stepped up by the secondary winding. This process continues. R7, C4, D5 and D6 are used to protect the transistors from spikes while C3 and C5 are used to improve the oscillations. Resistors R8 and R9 have been incorporated to facilitate distribution of current equally amongst the transistors. The value of R8 and R9 is around 0.05 ohm each; these can be made by taking about 1.75 metres of 20S WG enamel wire and winding it over a pencil to give it the shape ·of a coil.


Some useful hints regarding the proposed inverter with charger changeover circuit

 1. On switch on (S2), if the circuit does not function, reverse the feedback winding connection of one set (or both, if required). In other words, if the beginning of L2 is connected to emitter of Tl , the other end of feedback winding  L1 should be connected to the base of T2.

2. Connection from the battery terminals to the chassis tag should be as short as possible, and the wire used must be rated to carry 13 to 14 amperes.

3. Wherever heavy current flows, i.e. from the tag to the RL2 contacts and from there to emitter resistors (R8 and R9) through the centre—tap of X2, wiring must be done by 15SWG wire.

4. The no—load current is 5.5 to 6.5 amperes, depending upon the base drive. For a 122 cm ceiling fan load, it will rise to 8.5 to 9 amperes, and for both fan and tube light it will rise to around 12 to 13 amperes. lf it is more or less, adjust the values of R4 and R5 suitably.

5. Efficiency will be around 80 per cent on full load.

6. Sometimes the tube light may not light immediately on switch on, or it may start blinking when the fan is working. In such an event, a 0.68 F paper condenser rated at 400V in series with a push button switch may be connected (as shown by dotted lines) across A and B terminals of X2. However this is not necessary when it automatically takes over upon failing of mains. provided S2 and tube light switch are kept closed.

 A 12V 5 plate lead-acid battery used in automobiles is the minimum requirement for this system. This battery can be used for about four hours continuously at full load. Since the battery is used in inverter system, it never attains full charge, even when put under charge for long hours. As these batteries are not intended for cyclic operation, only 75 per cent of the stored energy can be used. Deep discharge or over-charge should be avoided.

Regarding the 1500 Watt high power amplifier is very nice to talk about single amplifier circuit is therefore not o be outdone by the class-A amplifiers. Power amplifier circuit that allows for use on large event that requires a variety of power or power from the amplifier. In reinforcement in block buffer and its driver transistors using high quality, but actually at the end of the transistor amplifier can be dtermined according to needs.