Showing posts with label HI-FI Power Amplifiers. Show all posts
Showing posts with label HI-FI Power Amplifiers. Show all posts
Saturday, December 12, 2009
32W HI-FI AUDIO POWER AMPLIFIER - TDA2050
The TDA 2050 is a monolithic integrated circuit in Pentawatt package, intended for use as an audio class AB audio amplifier. Thanks to its high power capability the TDA2050 is able to provide up to 35W true rms power into 4 ohm load @ THD = 10%, VS = ±18V, f = 1KHz and up to 32W into 8ohm load@ THD = 10%, VS = ±22V, f = 1KHz.
Moreover, the TDA 2050 delivers typically 50W music power into 4 ohm load over 1 sec at VS= 22.5V, f = 1KHz.The high power and very low harmonic and crossover distortion (THD = 0.05% typ, @ VS = ±22V, PO = 0.1 to 15W, RL=8ohm, f = 100Hz to 15KHz) make the device most suitable for both HiFi and high class TV sets.
- HIGH OUTPUT POWER
- (50W MUSIC POWER IEC 268.3 RULES)
- HIGH OPERATING SUPPLY VOLTAGE (50V)
- SINGLE OR SPLIT SUPPLY OPERATIONS
- VERY LOW DISTORTION
- SHORT CIRCUIT PROTECTION (OUT TO GND)
- THERMAL SHUTDOWN
R1----22K
R2----680
R3----22K
R4----2.2
C1----1mf
C2----22mf
C3----100nf
C4----100nf
C5----220mf
C6----220mf
C7----0.47mf
IC----TDA2050
Saturday, November 7, 2009
600 WATT HI-FI Power Amplifiers PA600
Towards the end of 1995, a scaled-down version of this circuit appeared in ’Elektor’ as ’PA 300’.
It is virtually the same circuit except for a less powerful output stage (now two complementary
pairs instead of five with additional driver stage) and minor changes in component selection and values. However, as ’Elektor’ is much more popular, many people built a ’PA 300’ without knowing it was scaled down from a bigger amplifier.
MORE.... click Here
OTHER.... click Here
Thursday, September 3, 2009
LM-3875 Amplifier with ECC88 Tube Buffer
TECHNICAL SPECIFICATIONS
Power Supply
- toroidal transformer 230V/8*12V/180VA
- output amplifier rails 2*32V DC(2*24V), two bridges with two BYW95C diodes in parallel
- caps Samsung 470uF/100V, four per channel
- tube buffer rails 2*45V (half-wave voltage doubler of 1*36Vac), two BYW95C's, CLC network, 470uF Samsung +100mH+6800uF Panasonic
- tube heating 6V DC, 4xBYW26c, 2* 1000uF Nichicon, stabilized with 7806, 1*1000uF Nichicon .
Input
-standard gold plated cinches, Alps selector 2*1in3, Preh pot 2*10klog .
Tube Buffer
- tube E88CC (NOS Tesla CH), or ECC88 (OS Siemens)
- standard metal-film resistors .
Output Amplifier
- LM 3875 - inverted setup - gain ca 30dB
- input capacitor 2u2/250V ROE MKT, LPF 2*680pF ROE MKC, 2*47nF/160V ROE MKP
- standard metal-film resistors
- output DC offset about -5mV .
Power on Delay
- relay 10A/30VDC on output .
Input Impedance
10k .
Frequency Range
10Hz-20kHz (-1dB, -2dB)/1W/8ohm/THD=0,1%/IMD2=0.075% .
Output Power
36Vpp - 20W RMS (8ohm/both amps on/THD lower than 0.15% 100Hz-20kHz)
24Vpp - 18W RMS (4ohm/both amps on/THD lower than 0.25% 100Hz-20kHz) .
MORE...... http://www.moxtone.com/Tube-buffered%20Gainclone.htm
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