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RE: Sub 12AT7 for 12AX7?

This sub will work, but not in all cases. Depends on circuit.
In a Fender VibroChamp, subbing a 12AT7 for a 12AX7 changes the downstream voltage and the vibrato/trem almost disappears. I tried this last week.
May not be relevant to orig posters question, but does remind one that different circuits have different rules...and therefore generalizations as to which tubes are "best"....are just that: broad generalizations.
jstrm


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