Originally Posted by NachoRT74
The chrome box uses the MJ10012 transistor


Be very, very careful when shopping for a replacement transistor...

The MJ10012 transistor is a generic NPN darlington available from multiple sources, since we deal directly with procurement from China sources we have found these costing from $1.25 up to $9....
Best to buy from an established USA source such as Mouser or DigiKey.

Just my $0.02... wink