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JM Blueberry Extreme needs repair

mswanson65

mswanson65

Well-Known Member
Just thought I would see if anyone out there has had a JM Blueberry Extreme pre-amp with issues. Mine was starting to act up periodically and now will not produce music at all. I put the original modern tubes back in and put a new fuse in. I noticed when I turn it on the 12X4 tube lights but none of the others appear to be getting power. I e-mailed Craig at NOS Valves and he told me to check the screws on the football shaped thing. He is too backed to take this on. Anyone know of a good tech for this? Thanks!
 
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Good luck getting schematics for this. I had one in recently and was unable to get schematics for it.
 
Try Hudson valley hifi.
Sounds like a PS issue.
Shouldn't be tough for a decent tech.
I'm pretty sure those use regulated DC
 
Sent it off to RHB Sound Dezign near Philly. They specialize in tube amp repair and mods.
 
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Got my Blueberry Extreme pre-amp back from RHB Sound Dezign today and it sounds great! These guys were great to deal with and really know their stuff. It needed a faulty bridge rectifier replaced to bring it back to life. They also have a line of high end pre-amps sold under the Backert Labs name....very tempting
 
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