The TAD 6V6GT-STR “Redbase” Premium tubes showed up and I got them installed in the 6V6 Curly Maple amplifier. I took new voltages and have been listening to the tubes with a variety of music. These tubes are very detailed and musical. They produce a stronger bass than the 6V6Gs and a very even tonality in the ultra linear topology. I would consider these a nice upgrade for any 6V6 amplifier.
The TAD Redbase 6V6GT-STRs are not quite as warm as the old 6V6Gs, but they are very musical and I believe very neutral in tone. They really let the music come through.
They also run at slightly higher current than the old 6V6Gs which is not surprising given the age of the old tubes. And at about a 5V lower plate voltage. Here are the measured voltages with the new tubes.
I’ll take the distortion measurements later. After I get done listening to the amplifier (which is playing in the background as I type). Till then I have to say that this amplifier just continues to impress with how it performs. It is definitely the upgrade it was intended to be.
As always, comments and questions are welcome.