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Tue, 03/25/2014 - 10:00
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Internal Photo - HD130 (12AX7)

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Steve Kennedy
Posted on Wednesday, June 05, 2002 - 12:35 pm:   
HD130 - Internal - 12AX7 Phase Splitter
Smote
Posted on Tuesday, July 02, 2002 - 11:00 am:   
My Hd 130 doesnt have a 12Ax7 tube..what year did they put them in? are they just in the HD130 reverb..
Steve Kennedy
Posted on Tuesday, July 02, 2002 - 12:15 pm:   
All Music Man amps made between 1974 & 1976 (approximately) had a 12AX7 phase-splitter tube.

These were found to be unreliable in some situations and were replaced by a solid-state circuit in 1977.

You can find more information on this subject in the site archives.

Steve

John D.
Posted on Monday, February 24, 2003 - 12:50 pm:   
Here are my two "cousins": a 112-65 restored to factory condition and my newest acquitisition, a 210-65, all stock and all original.../image
John D.
Posted on Monday, February 24, 2003 - 12:52 pm:   
OK, I'm obviously not doing something correctly,...how DO I get a couple of jpeg's to load up here???
John D.
Posted on Monday, February 24, 2003 - 12:57 pm:   
/image{112-65}
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