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Post subject: 1975 tube locator chart
Posted: Thu Mar 11, 2010 5:26 pm
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Joined: Sat Feb 20, 2010 3:32 pm
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Location: Spencer, MA
Hi guys! have had some computer issues, what else!? hey, I have No tube chart in my amp [1975 fender twin reverb] I am in the process of putting some tubes in, but, I am not sure if the guy that owned it before me did it right , or what. So, I know the power tubes are, [4-GL6] right? But the other ones I want to make sure! Thanks for all of your help. I only hope, that some day I can help someone!!!! Ricstar


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Posted: Fri Mar 12, 2010 4:38 am
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Joined: Fri Feb 05, 2010 4:31 am
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Location: Province de Québec, Canada
All twins are have the same tubes locator.

From left to right :

6L6,6L6,6L6,6L6, 12AT7,12AX7,12AX7,12AT7,12AX7,12AX7


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Posted: Wed Mar 31, 2010 6:28 pm
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Joined: Wed Mar 31, 2010 12:48 am
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Location: Tombstone Territory
This schematic should make it all clear...

http://www.schematicheaven.com/fenderam ... _schem.pdf

The 7025 subminiature noctal is a low-noise dual triode developed for military/industrial use. They're not very plentiful now but a good quality 12AX7A or ECC83A will work in lieu of them.

HTH

Arjay


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