Hoffman Amplifiers Tube Amplifier Forum

Other Stuff => Solid State => Topic started by: Tiny_Daddy on January 22, 2011, 10:44:11 am

Title: Ampeg matched transistors
Post by: Tiny_Daddy on January 22, 2011, 10:44:11 am

I am looking an an Ampeg 210SP with four output transistors, IRF140. One of the transistors has shorted. I notice two of the transistors have been marked with a blue dot and the other two with a red dot. Are these matched transistors? Available only from Ampeg?

Title: Re: Ampeg matched transistors
Post by: Tiny_Daddy on February 03, 2011, 08:23:57 pm

Well only two of the 4 output transistors were shorted so I cut them loose. The amp gives the appearance of working.