QuuBe – Factory Wholesale by Qoo10

<div> Note: Since the LME49810 chip is out of stock， it is only sold now without the LME49810 chip! The 40 yuan kit does not include the LME49810 chip! ! ! LME49810 push power amplifier class A amplifier! Static current adjustable， adjustable into Class A! This board is compact and compact， avoiding unreasonable routing and reducing unnecessary interference. The audio parts are non-inductive resistors， and the high-frequency characteristics are better! The adoption of the official standard circuit omits the promotion level， using the LME49810 to push the big tube， sacrificing part of the output power， but reducing the distortion! Canceled the negative feedback of the capacitance to the ground and made a DC amplifier to further reduce the distortion! Recommended quiescent current is set between 30ma-200ma! To avoid excessive startup current， users should first adjust the potentiometer to the middle about 1K before installing the equipment. The resistance of the middle leg of any side of the 2K potentiometer is about 1K. Large tubes use [B1560 D2309] or [B1647 D2560] or [TTA1943 TTC5200] or [SJB6150 SJB7150] randomly. PCB size (excluding large tubes): 7.75 x 5 cm Mono amplifier board， need several channels to shoot a few! Supply voltage: DC plus or minus 20-80V (need to replace the filter capacitor with double 100V voltage!)! The power supply mode is "positive negative" three-wire power supply! Note: The voltage range cannot exceed the specification. Exceeding this will cause the board to burn! ! ! Note: The heat sink must be insulated from the heat sink! Otherwise it will damage the board! LME49810 chip and heat sink must be insulated or else it will damage the board! ! ! Insulation did not do a good job of causing damage to the board at your own risk! It is recommended to use a power transformer with a voltage between the two 18-55V supplies (can only be used for the amplifier board after rectification and filtering)! It is recommended not to use more than 100W for monophonic use of maximum power! Listening Sense: The reproduction of the sound is very high， the sound is transparent， loose and natural， low frequency full! (High fidelity is a good amplifier!) <img alt="2" src="https://ae01.alicdn.com/kf/HTB1lkE_qBmWBuNkSndVq6AsApXa1.jpg"><img alt="1" src="https://ae01.alicdn.com/kf/HTB1ZatByVGWBuNjy0Fbq6z4sXXah.jpg"> 100KHz sine wave 1V input port (for testing purposes only， please do not use it for audio applications， otherwise the consequences are your own) <img alt="3" src="https://ae01.alicdn.com/kf/HTB1V2iry25TBuNjSspmq6yDRVXa4.jpg"> 100KHz square wave 1V input port (for testing purposes only， please do not use it for audio purposes， otherwise it will be at your own risk) <img alt="4" src="https://ae01.alicdn.com/kf/HTB1aGSly41YBuNjy1zcq6zNcXXah.jpg"> 20KHz sine wave 2V input port (for test use only， please do not use it for audio purposes) <img alt="5" src="https://ae01.alicdn.com/kf/HTB1K.9cyY5YBuNjSspoq6zeNFXaL.jpg"> 20KHz square wave 2V input port <img alt="6" src="https://ae01.alicdn.com/kf/HTB17_Hly21TBuNjy0Fjq6yjyXXaB.jpg"> <widget data-widget-type="customText" id="23751245" title="a1" type="custom"></widget>   </div>

1PCS Standard 2 LME49810 Push The Big Tube Amplifier Official Standard Line Effect Board Diy Kit Not