Technical Tips



	Ballast Tubes and Resistance Line Cords
	Magic Eye Tubes and Tuning Indicators
	Changing from Battery Bias to Automatic Bias (Reprint of 1933 article)
	Reforming Electrolytic Capacitors
	Rejuvenation of Vacuum Tubes (American Article)
	Substitutes for the WD-11
	Replacement for Tubes 01A, X99 and WX12 using types 30 and 31
	By-Passing Defective Audio and IF Transformers