24-10-2012, 03:59 PM
i built an amp years ago useing 807's class a pp ,ht was about 450 volt output was about 20 watts rms i used an ecc82 as phase splitter.
the circuit was based on a mullard 5-10 .i must admit it was not perfect very unstable .but that was maybe my lack of knollage at the time.
ps the heater volts on an 807 are 6.3 volts so your 10 volt tx would need a regulator dropper.
to get your 100 watts i would look at class ab2 guitar amps for circuit ideas.
pps why do you need 100 watts ? most people who use high quality valve amps ar happy with 10/40 watts.
as for building a valve mag pickup eq circuit best of luck.
i dont want to put you off but look at the size of the output tx on say a leak stereo 20 and think this only outputs 12 watts.
rob t
the circuit was based on a mullard 5-10 .i must admit it was not perfect very unstable .but that was maybe my lack of knollage at the time.
ps the heater volts on an 807 are 6.3 volts so your 10 volt tx would need a regulator dropper.
to get your 100 watts i would look at class ab2 guitar amps for circuit ideas.
pps why do you need 100 watts ? most people who use high quality valve amps ar happy with 10/40 watts.
as for building a valve mag pickup eq circuit best of luck.
i dont want to put you off but look at the size of the output tx on say a leak stereo 20 and think this only outputs 12 watts.
rob t
if its made by hand it can be repaired by hand
