2005年2月24日 · I'm looking for a datasheet for uPC2581V - Audio Amplifier Driver - made by NEC. Can anyone help me out, please? Thanks in advance. BvP

2007年3月17日 · NEC's UPC2581 is exactly same pin-out of LM4702, and is found in many older sony stereo/ 5-channel receivers. These chips are older than LM4702. I guess national is following these ideas to create a chip that handles all the front-end of an high performance amplifier and leave the output devices to build different amplifier configurations.

Can someone help me looking for the upc2581 datasheet,thanks!

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2007年7月9日 · Thanks Chris, it looks like I'll go ahead and order 3 uPC2581's, 5 MN2488's, and 5 MP1620's and try my hand at swapping them out. If I can get this thing fixed it's going in my parent's new home, driving a 5.1 setup and 2 outdoor speakers.

Hello, I would appreciate any reference, experience or recommendation about this kit or if there could be a better one? Thankyou very much Field Effect Transistor FET Symmetrical Double Difference HiFi Fever Amplifier Board 120W+120W UPC2581 Circuit...

2013年9月9日 · Folks, The right channel of my Sony Receiver (STR-DE875) has very low volume relative to the other channels. I have done some minimal troubleshooting and

2012年11月27日 · Only enough room to fit 1 STK, I just barely managed to fit 4 TIP35/36 transistors on the heatsink, and they were packed side by side like sardines. Using TIP35/36 outputs with the UPC2581 worked ok, but it oscillated like a chinese bandwagon and the heatsink got way too hot way too quick.

2020年7月30日 · Hi, can u suggest power amp drivers? Smth that could safely operate at +-42 v, preferrably easy to find, not expensive upc1225 is +-46 and dont know if it is safe enough to use with 42 v

2024年2月3日 · I’ve asked a similar question in the past. I’m working on an amplifier that has 8 outputs on each channels heatsink. At the moment I am unsure of the voltage rails for the outputs as the schematic is pretty unreadable. The originals are MT200s 2SC2773 and 2SA1169 Of course one channel has...