LME498** and LM4702 Series (100-500watts Amp)

[tony]

meron pa akong board nyan at ic, pm mo ko kung gusto mong mabuo...

[acer]

pa subs

[mund24]

pwdei ba mag parallel ng mosfet sa output stage ng LM4702A?

yes pwedeng pwede sis
san ka pala nakakuha ng A type?

[mund24]

master tony! musta na?  
nextweek ko siguro masisimulan yung lm4702 na bagong dating galing sayo!

thanks ulit master

[tony]

enjoy building.....

[drin20]

Bigay ni sir Tony LM4702a ko. Thanks sir Tony. Pair ng IRFP240 and IRFP2940 gamitin ko. Dito ako sa raon ngayon. Libot libot muna dito. Baka may treasure na pair ng 2sk1058

[drin20]

calling sir tony and other masters here, kindly comment in my schematic for LM4702



Thanks 

anong fixed value ang pwedi i sub sa 200r potentiometer? thanks

mund24 pair of 2sc5200 / 2sa1943 ang gagawin ko. mahal ng 2sk1058. hehehe

[mund24]

enjoy building.....

thanks master T

anong fixed value ang pwedi i sub sa 200r potentiometer? thanks

mund24 pair of 2sc5200 / 2sa1943 ang gagawin ko. mahal ng 2sk1058. hehehe

sis if you want fix value  range resistor is 300-500ohms but for safest value around 400ohms

yung sa akin kasi using that variable resistor (200R) set to 0-50ohms around 50mA yung idle current ko, while setting it to 100ohms idle current is around 25mA(eto idle current ko ngayon)

matching with MJL21194/93

[tony]

^that is right, use a variable pot to adjust idle current, then measure the resistance of the pot to get the actual value....say you got 36 ohms, the nearest standard values are 33 and 39ohms, either of the two will work....

[drin20]

Ok salamat. Saan ba sinusukat ang idle current? Between base and pot ba?

[tony]

^across emitter resitors of the output trannies...in the scheme it says 0.2ohms so if you want to bias the output trannie to 50mA, then you should be able to measure about 10mV accorss that resistor....

[mund24]

^across emitter resitors of the output trannies...in the scheme it says 0.2ohms so if you want to bias the output trannie to 50mA, then you should be able to measure about 10mV accorss that resistor....

sir tony power of five by yung factort doon bakit naging 50mA yung 10mV?
sa akin kasi never ko pang nasukat yung dc sa may emiter resistor! sa mismong output  lang around 20mV

[ditchie]

^Ohms Law siguro sis..

[mund24]

oo nga bat di ko naisip yun!
try ko ngang esolve! thanks!

ayun tama nga!

+1 anyway sis

V=I x R
V=50mA x 0.2ohms
V=10mV

[tony]

tama ka dyan....+1

[mund24]

+1 din master T for supporting this thread!
we appreciate your help in this thread!

[mund24]

guys pa OT

my new toy
sa wakas mabubutasan ko na yung heatsink ko!

[sp0c0]

Hi mga sis and masters!

it's nice to be back..recovering from a road accident..

soon mai tuloy ko narin yung naudlot ko na lm4702 project. na miss ko ang elab sobra.. na house arrest ako at ayaw pahawakin ng kahit anong electronic tools or circuit e hehe.

[01110011]

^bakit anong nangyari sis?

[sp0c0]

sumemplang ako sa motor sis... yung 10 wheeler truck kasi sa harapan ko habang na byahe ako e biglang naglag lagan yung load nya na malalaking islab ng concrete at bato.