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Topic: Preamp Tubes? |
Bob Snelgrove
From:
san jose, ca
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Posted 26 Oct 2007 7:12 am |
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Brad and others,
I got my Mesa pre and it sounds great. A little to bright and "glassy" on the high end. What would be good tubes to try, even if expensive (NOS) I figure they last a lifetime so I'd rather spend more if it makes a big difference.
thx
bob |
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Brad Sarno
From:
St. Louis, MO USA
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Posted 26 Oct 2007 8:04 am
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Bob,
try replacing the 250p ceramic treble cap with a 250p silver mica type. Also if there are any other ceramic caps in the path, make those film or silver micas as well. Tubes may not fix it.
Brad |
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Bob Snelgrove
From:
san jose, ca
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Posted 26 Oct 2007 3:04 pm
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Thanks, Brad
Guess I'll have to hunt down a schematic 
I found a few Sylvania, RCA, GE,Siemens and Ruby tubes that I had stashed.
What is a 6201 and an ECC81?
Do preamp tubes have a huge impact on tone or minor?
thx
bob |
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Bob Snelgrove
From:
san jose, ca
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Posted 26 Oct 2007 6:06 pm
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I put a NOS Sylvania in what I think is V1. The cir. board is not marked so I assumed V1 is on the left looking at the front of the unit.
Anyone know the Studio pre tube layout?
thx
bob |
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Brad Sarno
From:
St. Louis, MO USA
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Bob Snelgrove
From:
san jose, ca
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Posted 26 Oct 2007 8:05 pm
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Thanks, Brad
What does V2 do? I *think* I changed out V1 (far left looking at front" but it wasn't marked on the board.
So what do the ceramic caps look like and can I tell where they are on the board by the schematic?
thx
bob |
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Jim Sliff
From:
Lawndale California, USA
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Posted 27 Oct 2007 8:17 am
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Bookmark this page. It will give you the cross-references for just about any guitar amp tube you'll ever find:
http://thetubestore.com/nsearch.html
_________________
No chops, but great tone
1930's/40's Rickenbacher/Rickenbacker 6&8 string lap steels
1921 Weissenborn Style 2; Hilo&Schireson hollownecks
Appalachian, Regal & Dobro squarenecks
1959 Fender 400 9+2 B6;1960's Fender 800 3+3+2; 1948 Fender Dual-8 Professional |
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