Mesa Boogie Big Block 750 repair
- By agedhorse
- Amps and Cabs [BG]
- 26 Replies
ALFET was one of several intermediate companies that manufactured or packaged lateral devices, they are long gone. There were at least 4 different companies we went through in succession as they appeared then went out of business!Thanks for your response.
I had hoped to ask you about this some other time, but since we're talking about MOSFETS...
Attached is a photo of the first three MOSFETS in my 2011 Walkabout that I bought used. Q2 is different from the other two and has a fair amount of flux remaining that isn't anywhere else on the board. Would you suppose that this MOSFET had been replaced after leaving Mesa. By the way, Q4-Q6 are all DL821 ALFET components.
The amp still works great but I've been wondering.
Yours may very well have been repaired. If it’s working, I recommend leaving it alone.