kdove
Well-known member
I have a 1977 boogie 100 watt head that is original. Still operating but while replacing the original pre-amp tubes to try to fix an occasional "breaking up" problem, I discovered the V1 "fetron". After doing some research, I think I found everything available on the fetron. Then talked to Mesa Boogie and got a bit of information from them on what needs to be done to replace with 12AX7. Although they have responded, they really haven't explained it really well yet ... exactly what needs to be done if I have to replace the fetron. I've got another information request for further clarification into them now.
My question: Anybody out there know exactly what needs to be done to replace fetron with 12AX7? Heard they had something on the Mesa website but it was nothing near a complete answer. In fact, I had the same paperwork in my files at home.
Also: What does it sound like if you make the adjustment? I've been pretty satisified with this amp for 30 years. However, since they stopped
using fetrons about a year after mine was made ... makes me wonder ... is it better without the fetron? Hard to imagine it being better?
Not sure that I'll ever have to change it ... it may not be the cause of my occasional problem ... but since they don't make fetrons anymore ... I'd like to know all I can about it.
My question: Anybody out there know exactly what needs to be done to replace fetron with 12AX7? Heard they had something on the Mesa website but it was nothing near a complete answer. In fact, I had the same paperwork in my files at home.
Also: What does it sound like if you make the adjustment? I've been pretty satisified with this amp for 30 years. However, since they stopped
using fetrons about a year after mine was made ... makes me wonder ... is it better without the fetron? Hard to imagine it being better?
Not sure that I'll ever have to change it ... it may not be the cause of my occasional problem ... but since they don't make fetrons anymore ... I'd like to know all I can about it.