212 HD130 sounding too compressed.

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212 HD130 sounding too compressed.

Music Man Amps Discussion Forum » Adjustments, Maintenance & Calibration » 212 HD130 sounding too compressed.

Author Message
 Scott Cannon (scott_c)
Username: scott_c
Registered: 05-2006
Posted on Sunday, June 18, 2006 - 07:33 pm:   

My 212 HD130 is sounding too compressed. Especially during the warm up period, and not as much once the amp get warmed up, but enough to be a problem. Any suggestions on what might be the cause?
 Steve Kennedy (admin)
Username: admin
Registered: 03-2002
Posted on Tuesday, June 20, 2006 - 07:10 pm:   

Has the amp had a full cap job in the last 10 years? Has it had a properly biased new set of tubes in the last few years?
I would suspect that the amp may need a cap job or some plate resistors replaced (in addition to a new set of tubes and biasing).
Steve
 Scott Cannon (scott_c)
Username: scott_c
Registered: 05-2006
Posted on Wednesday, June 21, 2006 - 06:14 pm:   

Had a partial cap job done, some plate resistors replaced, and new tubes. Must have missed some bad caps.
 Steve Kennedy (admin)
Username: admin
Registered: 03-2002
Posted on Saturday, June 24, 2006 - 11:31 pm:   

All of the electrolytic caps ought to be replaced at the same time. If some are bad after 25 years, the others are or will be soon!
Steve