I had some tubeamps, 2A3, 300B, EL84 in triode, EL84 in push pull also a Klein&Hummel. But I like the Dynaco ST70 best.
It is a Dynaco ST70 with VTA board.
Since some time as preamp I use a Little Dot III. This works well. It is an very tuby sound.
Now, one tube of the Little Dot makes noise and I put it out. In the time till the new tubes will arrive I installed only a 25k alps poti.
No preamp only this poti. It is like only a step up attenuator, but it is a poti.
The sound is not bad. It sounds very clear. The bass is little more, the hights are little less. The soundstage ist bigger, but not so deep.
I don't know what I like better. With the poti everything is perfect, but I miss some emotions the tubes gave.
The tube preamp sounded more lifelike - but also more noisy. There was more swing and vibration in the music.
The poti sounds more dead, but clear and with punch.
Should I try a step up attenator? Best a 100k attenuator. The poti only has 25k.
Really positve with the poti is, that I can handle the power better. I can turn the poti at 12 o'clock. The preamp gave the same
power at 9 o'clock. Yes, I have very sensitive hornspeakers with more than 105db.
I read that Bob likes his step up transformer and his preamp is not used since the attenator is in action.
I thought I would change the Little Dot preamp in future and order a SP14 from tubes4hifi. But now I am not so shure anymore.
What do you think?