5
Step 3: Filament Driver part
Now we can solder the filament driver part components. This part
of the circuit contains a H bridge which created by 4 MOSFETs
and other components for EK level shift with the -HV part circuit.
This part of the MOSFETs components are SOTt23-3 MOSFET(A1SHB
& A2SHB mark) and resistors and capacitors, please do not change
the C3+C4(1uF/50V) capacitors value(only use the caps in the
kit).
And it also contains a
6V5 Z-diode
inside, usually in glass package
with a round color bar(usually in blue or black) at the cathode
side, easy to find, please solder it in the right direction.
