I want to introduce you one interesting circuit. There is absolutely nothing innovational, circuit is hyper simple. But, I hope, my experience of construction building will be helpful for novices.
Tubes, used in this circuit may be 6AS6 or Russian 6Ж1П.
This tubes can work with LOW anode voltage!
In the circuit I suggest power is 12-20V DC
To use single supply, I put LM7806 voltage regulator to convert input DC to 6V for heat.
Original Article on my blog
This is very convenient because you don't need to build special power supply, you may use standard adapter (better is switching).
This was the first try. After testings, when I heared sound is really well (testing gear: Soundtech Series A mixing desc and Quested S6 monitors, signal sourse - audio interface e-mu tracker) I assembled the second version - with factory-made panels and whole better look.
Also, if anybody wants - there is video of testing.
And - certanly - inside mount.
or
Tubes, used in this circuit may be 6AS6 or Russian 6Ж1П.
This tubes can work with LOW anode voltage!
In the circuit I suggest power is 12-20V DC
To use single supply, I put LM7806 voltage regulator to convert input DC to 6V for heat.
Original Article on my blog
This is very convenient because you don't need to build special power supply, you may use standard adapter (better is switching).

This was the first try. After testings, when I heared sound is really well (testing gear: Soundtech Series A mixing desc and Quested S6 monitors, signal sourse - audio interface e-mu tracker) I assembled the second version - with factory-made panels and whole better look.
Also, if anybody wants - there is video of testing.
And - certanly - inside mount.

or
