Half Wave and Full Wave Rectifiers II

Mullard IW3 silver top dome £ 300 pair.

Mullard IW3 silver top dome £ 550 quartet.

Marconi Osram MU14 Indirectly heated rectifiers tested 100% £ 400 pair

Marconi Osram MU14 no logo tested 80% £ 150 pair

MU14 Marconi Osram tested 80% £ 180 pair