Semi - Conductor ~ Solid State Replacement
This is a solid state replacement for
5U4, 5Y3 and 5AR4 Tubes.
Solid State direct replacements are more
efficient than vacuum tubes. No heater current is
required. In some
cases dropping resistors should be used if the higher
output voltages often yielded with these diodes
create an unsafe condition.
Attention! ~ When
using this device to replace a vacuum
tube rectifier, you should ALWAYS use a "Standby Switch"
in the high-voltage circuit to allow for a filament
warm-up period in the amplifier tubes! This will help to
prevent "Cathode Stripping" of the power output tubes. In
other words, it is CRITICAL when replacing a rectifier
tube with solid state replacement rectifiers!
Preferred Substitutes ............. 5AR4, 5U4, 5Y3,
1N1239, T-SSR01.
Do not use to replace 866A tubes. These require a 1N2637
Semi-conductor.