parts

levelg

Member
2010-10-07 2:06 pm
Hi,

Could anyone tell me where i can order IR21844s (14 pin chip) driver chips? I need to repair 10 amps which use the 3s-tech boards plus the smaller chips TL072C and LM211

i need :
40x ir21844s
10x TL072C
10x LM211

anyone have a site i can use for order.
 
Hi,

Could anyone tell me where i can order IR21844s (14 pin chip) driver chips? I need to repair 10 amps which use the 3s-tech boards plus the smaller chips TL072C and LM211

i need :
40x ir21844s
10x TL072C
10x LM211

anyone have a site i can use for order.

just curious, which amp are these? and, are the chips with the markings ground off are the IR ones?
 
Thank you Frank, i have actually sent the supplier Perry mentioned an email for getting al the parts from them in one shot.

Thanks, I LOVE THIS FORUM!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

LM111/211/311 are all the same device just specified for different temperature ranges. See the data sheet.

http://www.national.com/ds/LM/LM111.pdf

Odds are high you can use a 311 if you can't find 211s.

 

levelg

Member
2010-10-07 2:06 pm
I have finally gotten the parts and as luck might have it gotten 2 brand new driver boards as well. I have since installed new FETS( irfp360LC and IRF064N) and new resistors for the burnt ones. There was sound and i used the amplifier for 2 competitions then it started giving hassles again. Changed the muting transistor that runs down the middle of the board between the power supply card and the transistor drive board . after awhile that failed as well. Now the amplifier switches on but there is no sound, i have changed the transistor again but to no avail. any hints on getting this problem sorted?