FS: Home Audio Video Texas Instruments LM1876 Overture Audio Power Amplifier 0.1% THD+N 20W+20W (100% orignal parts)


MrRIG

Well-Known Member
Adept
Aug 12, 2008
276
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81
Rating - 85.7%
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Expected Price (Rs)
1927
Shipping from
New Delhi
Item Condition
5 out of 5
Payment Options
Cash, Bank Transfer
Purchase Date
Aug 6, 2019
Shipping Charges
Excluded - at actuals
Have you provided two pics?
Yes
Remaining Warranty Period
None
Invoice Available?
No
Reason for Sale
Selling extra bought items.
Description Audio IC : The Texas Instruments LM1876 is a stereo audio amplifier capable of delivering typically 20W per channel of continuous average output power into a 4Ω or 8Ω load with less than 0.1% THD+N.

You can verify source of purchase and price of each critical component, have provided the links in the table (stock no). Some products are locally bought.


Output Power (Continuous Average)

THD + N = 0.1% (max), f = 1 kHz

|VCC| = |VEE| = 22V, RL = 8Ω 20W/channel (Typical)
|VCC| = |VEE| = 20V, RL = 4Ω 22W/channel (Typical)

(VEE = Negative voltage, VCC = Positive voltage)


Transformer required:

Transformer* for 4 Ω speakers: AC 12-0-12, 80/100 VA or 14-0-14, 80/100 VA

Transformer* for 8 Ω speakers: AC 15-0-15, 100 or 120 VA or AC 18-0-18, 100 to 120 VA

*do not increase recommended voltage as there is no need.


Heatsink (you have to buy)

Size in inches: W x H x D | 5 x 3 x 2


Actual output during test



AC transformer used : 14-0-14 secondary AC voltage (“0” means ground)
Input audio signal : 1kHz
Speaker used : 8Ω (Ohm)
Output RMS power measured : 12.7 volt RMS
Output in watts : 20.16 Watt each channel for both channels it is 40 watts



Component list and verification links




SNStock No.Part typeDescriptionQty.
Pieces
Price
1533-9678Amplifier ICTexas Instruments LM1876TF/NOPB Speaker Amplifier, Class-AB Stereo 7.5MHz 80dB, 15-Pin TO-220
1
562.64
2116-925CapacitorPanasonic Aluminium Electrolytic Capacitor 22µF 35 V dc 6.3mm Through Hole KS Series Lifetime 1000h +85°C
2
49.74
3684-1999CapacitorVishay Aluminium Electrolytic Capacitor 4700µF 35 V dc 18mm Through Hole 038 RSU Series Lifetime 3500h +85°C
2
454.30
4855-8702ResistorVishay AC03 Series AC Axial Fixed Resistor 4.7O ±5% 3W
2
109.88
5108-2700Capacitor Film WimaWIMA 100nF Polyester Capacitor PET 100 V dc, 63 V ac ±10% MKS2 Series Through Hole
2
72.72
6108-2980Capacitor Film WimaWIMA 1µF Polyester Capacitor PET 100 V dc, 63 V ac ±10% MKS4 Series Through Hole
2
137.76
7228-6767CapacitorPanasonic Aluminium Electrolytic Capacitor 100µF 35 V dc 6.3mm Through Hole M Series Lifetime 2000h +85°C
1
20.85
8148-792ResistorTE Connectivity LR1 Series Axial Metal Film Fixed Resistor 18kΩ ±1% 0.6W ±50ppm/°C;
1
5.96
91126955ResistorMCMF0W4FF2202A50 - METAL FILM RESISTOR, 22KOHM, 250mW, 1%
4
9.44
101126919ResistorMCMF0W4FF1001A50 - METAL FILM RESISTOR, 1KOHM, 250mW, 1%
4
4.72
11537-3498Capacitor-Ceramic MLCCAVX 100nF MLCC 50V dc ±10% Axial SA115C104KARC
1
16.87
12704-7841CapacitorRubycon Aluminium Electrolytic Capacitor 100µF 35 V dc 8mm Through Hole ML Series Lifetime 5000h +105°C
2
55.22
13 NA PCBPrinted circuit board bought from aliexpress.com
1
300.90
Parts bought locally
0
14NAStandoffsStandoffs (Pads)
4
40.00
15NARectifier6 Amp Bridge Rectifier
1
40.00
16NAWire to board3 pole wire to board connector (Blue)
1
10.00
17NAWire to board2 pole wire to board connector (light green)
2
30.00
18NA3 pin header3 pin header for audio input
1
1.00
19NAAudio-in Cable3 pin audio in cable
1
5.00
Total
1927




Important information: Please see the image for rectifier installation.



Sound is very pleasing and it can drive old unused bookshelf speakers.



Minimum requirements:

· Buyer must have some knowledge of electronics

· Must know polarity sign printed on the electronic part and on the green PCB

· Must know how to solder the electronic components on the PCB

· One transformer

· One heatsink

· Wires for connections

· Case for the amplifiers

· Audio in jack or input socket (left/right)

· AC power in socket

· AC power cord

· Two speaker sets (4, 6 or 8 ohms)



Warning:


If you do not know what you are buying, please don’t buy.

Do not solder electronic parts incorrectly for e.g., soldering a capacitor positive lead in the negative hole.




1. The products don’t come with warranty. However, I shall check each item before sending.

2. Age of products: 4-5 months old, unused.

3. The completely installed unit displayed in the thread is for representation only. My friend had bought it and currently using it.

4. Reason for sale: I wanted to buy genuine good quality components such as Nichicon/Panasonic/Wima capacitors, these capacitors sold on minimum quantity basis for eg. 5 pieces, 10 pieces etc. Hence, selling extra components.



New Delhi buyers preferred



Thank for reading
 

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