7812 vs 7912

[KU40]

I am repairing an amplifier and I think a 7912 regulator is bad. What's the difference between the 78 and 79? Radio shack apparently only carries the 7812 so if I have to use a 7912 I suppose I'll have to order it from somewhere else.

 

[Tekko]

7812 = positive bus voltage regulator.
7912 = negative bus voltage regulator.

 

[latala]

please alsop note that the pin connections are also different
regards trev

 

[AndrewT]

Hi,
down load the datasheets for each.
Lots of useful guidance and circuits as well as the techy jargon.

 

[Leolabs]

From:Fairchild,NS,TI,ST.......................any of them.