Tube voltage amp + Transistor buffer at 30V supply

[lineup]

Supply.
Transformator 30VAC or 2x15VAC.
Voltage regulator LM317T (see image) for 30VDC output.

 

[lineup]

The circuit.
The tube can be ECC86 or 6GM8 or 6N27P.
The voltage gain is like x11.6.
The output buffer is providing like 105mA.
This is done by using a LM334Z current source.
The input and output capacitors should be of good quality.

This circuit is done for 32 Ohms headphone.
Can be used of other headphones, but I have 32 Ohm headphone.

 

[lineup]

The Heater for ECC86.
The heater use a current source based on LM317T.
This gives a constant current of like 330mA.

 

[marconi118]

Nice!

 

[jean-paul]

Psssst! I stock Siemens ECC86 NIB NOS......

 

[marconi118]

Any source for ecc86?

 

[jean-paul]

Misconception in your face

 

[kp93300]

The circuit.
The tube can be ECC86 or 6GM8 or 6N27P.
The voltage gain is like x11.6.
The output buffer is providing like 105mA.
This is done by using a LM334Z current source.
The input and output capacitors should be of good quality.

This circuit is done for 32 Ohms headphone.
Can be used of other headphones, but I have 32 Ohm headphone.

Can this circuit works as a preamplifier ?