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Post by larryo on May 4, 2008 8:27:00 GMT -7
Just curious why the tube chart has both of these listed. Are they not the same tube? Anything I should know before experimenting with some of my old 12x7's?
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Post by myles on May 4, 2008 9:14:34 GMT -7
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Post by Lefty on May 4, 2008 9:34:02 GMT -7
Sometimes tubes take on different names depending on geographical location. In the UK they are called valves, in the US, tubes. As with the 12AX7/ECC83. Also the EL84/6BQ5. And then you have the 6L6/5881 same pin out and are interchangeable but still different sonically and physically.
It's always a good idea to familiarize yourself with both names of tubes that are used on your amp, if there are any. You might pass up a good tube because you were looking for a EL84 and it was labeled 6BQ5.
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Post by larryo on May 4, 2008 10:11:02 GMT -7
Thanks for the replies (and the in depth link, Myles). Yep-I'm aware of the interchangeable names for tubes, just was a little curious why the tube chart had V1 and V2 listed as ECC83 and V4 and V5 as 12AX7, but no matter. I tried a couple of different GE 12AX7's I had laying around in V1-very little difference to my ears aside from maybe some perception in volume.
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Post by myles on May 6, 2008 17:09:40 GMT -7
Fender used to specify 7025 for the more critical positions on their tube charts and 12AX7s in the other non-AT7 positions. The 7025 was a more highly selected 12AX7 back in the sixties.
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