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Randy Beavers
Posted on Sunday, October 26, 2003 - 10:12 am:   

I just recently bought back this amp I got in '82. The high end is very "glassy", I don't remember it being this way. I put new tubes in and that helped. If I turn the master up all the way the treble is alot hotter that if I play it at 7 or below. At this point I can only turn the treble control between 3 and 4 or it will cut your head off. My question is, what does an amp sound like when the caps are getting weak? The amp is quiet, no hum or buzz.
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michael kaus
Posted on Monday, October 27, 2003 - 07:03 am:   

Your caps really shouldn't effect a change like that. Some amps are voiced trebly like that. My 2-10 65 is that same way. Personally though, I've never had mine THAT high! 150 watts wide open? Where are you playing?!!!!!!!! Seriously, you could have a cap going south, letting the world through, but it would be a trial and error method to replace them unless you are able to check them all yourself. Does your model have the 12ax7 PI tube or is it solid state? Mike.
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Randy Beavers
Posted on Tuesday, October 28, 2003 - 06:18 am:   

Michael,
this amp is solid state on the pre-amp side, and has 4 6L6's on the power side. I play pedal steel so I want it clean. While the master is turned up all the way the pre-gain is only at about 3. However I can back the master down to around 6 and still have plenty of power. I'm just curious as to why turning up the master increases the treble.
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michael kaus
Posted on Tuesday, October 28, 2003 - 06:37 am:   

Most likely, what you are getting is just the power tubes are being pushed a little harder and the production of more power changes the tonal character of the amp. You may jsut want to leave the treble down and run with it.

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