GuyB
05-08-2008, 12:26 PM
I bought my first tube amp (Traynor YCV 50 Blue) last september. I love it. Had some problems a month ago (loss of power and distorsion even at low gain on the clean channel). I had to go twice to the store where the tech first changed the two pre-amp tubes and, since the problem persisted, a second time for a welding. Now it o.k. even if the sound does'nt seem to be exactly the same as before. But I have some questions.
The tech gave me back the "old" tubes : one was a Sovtek 7025/12AX7WA,
the other was a Penta 12AX7A. The replacement tubes are made by GT and are 12AX7-R3.
1- Is it "normal" to have two pre-amp tubes that are not exactly the same in a "new" amp that comes from the factory ?
2- What's the differences between all of these 12AX7 with different suffixes ?
P.S. You will have to excuse my limited capacity in English.
The tech gave me back the "old" tubes : one was a Sovtek 7025/12AX7WA,
the other was a Penta 12AX7A. The replacement tubes are made by GT and are 12AX7-R3.
1- Is it "normal" to have two pre-amp tubes that are not exactly the same in a "new" amp that comes from the factory ?
2- What's the differences between all of these 12AX7 with different suffixes ?
P.S. You will have to excuse my limited capacity in English.