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Post by telejas on Jan 7, 2013 11:52:36 GMT -7
I was just given a couple of mid-late 60s GE 12AX7 (6681) tubes made in GT Britain. In my "Google" searches, I see these may *possibly* be re-branded Mullards from 1966...... Either way, they're probably better than newer tubes.
So my question... I know changing the Phase inverter tube in the Ray makes a little difference in tone, but will it be worth using (possibly) NOS tubes in that spot or will it make a huge difference? Otherwise, my other amp would probably benefit quite a bit from a couple old 12AX7's since it uses these as preamp tubes (unlike the Ray).
Thanks!
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Post by drew on Jan 8, 2013 12:15:05 GMT -7
According to Dave Hunter's "Guitar Amp Handbook" a nice vintage 12ax7 would be better served in the V1 position. Not applicable for the ray in V1 but you get the gist... He says a modern quality balanced triode 12ax7 would be the best for a PI tube.
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Post by telejas on Jan 12, 2013 15:55:53 GMT -7
To answer my own question.....
I swapped out the new Tungsol for the old GE tube and not a huge difference in tone (like swapping the EF86 would do), but it seemed to "focus" the amp a little better. I can't tell much difference with single notes, but when playing chords, they sound tighter (for lack of better words).
I'm going to leave it in for a while to see what I think.
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