BM7 Mk 2 coil Gallery
The BM7 Mk2 coil is a rebuild of the old BM7 but has a new base unit which features a built in DC HV power supply, this has big DC filter capacitors, charging cokes and uses our high speed series rotary spark gap, the base unit can be switched over quickly so the coil can run in normal AC mode, the power supply has been changed over to our 15KVA pole pig. 
A few shots of the built in DC power supply, Left - High speed series rotary spark gap and Right - three large DC filter caps.
Below is the high voltage full bridge rectifyer made of four 40KV - 2A diodes then on the right is a single 40KV diode called the "De-Qing" diode
Copy right 2021