A basic schematic idea for plotting valve curves wot I drawed, the circuit details of the regulator(s) are not shown, gives some idea for the connections to DUT, switches etc, no component values shown as such....experiment 
The ref for the mains transformer is given....'scuse scrawly diagram...On the heater switch to the bridge rectifier the top position is for 11.3 volts ac in the bridge as well as the 6.3 volts marked, forgot to write that in...
Lawrence.
The ref for the mains transformer is given....'scuse scrawly diagram...On the heater switch to the bridge rectifier the top position is for 11.3 volts ac in the bridge as well as the 6.3 volts marked, forgot to write that in...
Lawrence.
