• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

ED8000 SE or Parafeed?

I have some pieces
of ED8000
looks realy good...
small and compact
I need a little amp which could be easy to set
and with no complex OT at all
thinking about ED8000 or 2A3...
settings for ED8000
heating 6.3V/0.8A
RL=1500 ohm
Lp=9H (8Hz -1db)
Ua=154V/167V anode voltage not Vb,
Vb=Ua+Ug+drop at OT
Rk=please calculate...
Ck=experiment with 220uF to 1000uF
Cdyn=44.5pF for choosing the Ri of the input tube...
Ri=225 ohm