Yoh,
Hmmm--Sounds like a faulty batch of output Trans poss'-- if you are doing everything right as Trelja states any fault arising from the Tubes will blow the 180R across the tube( you can see it large dark green one). I must admit not having heard of many output Trannies going south ,however Jadis Power ones set for 220v HGK market finding their way to Aust will hoof it with our 240/250 v surges.
Have you tried this Tech-- he poss could help in Sydney
joseph.barkoczy@audioconnection.com.au
Best,
DesW