Electron Ray Tuning Indicator
Tubular Type Eye Tubes ~ One Re-Boxed
The 6U5 / 6G5 / CV504 Eye tube is a glass Vacuum tube type used to
indicate visually by means of a flourescent target the
effects of a change in a controlling voltage. It is used
as a convenient, non-mechanical means of indicating
accurate radio-receiver tuning. In other words it shows
radio signal strength coming into the receiver and tells
you when you are receiving the maximum signal capable
with the antenna you have. This tube requires a
6-contact socket and may be mounted in any position.
It was first manufactured by RCA in 1947.
Electrical Data:
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.3 A
Maximum Heater-Cathode Voltage
Heater Positive with Respect to Cathode:
DC Component .............................. 90 V
Heater Negative with Respect to Cathode:
DC Component .............................. 90 V
Preferred Substitutes .............. 6G5, 6H5, 6U5, CV504
Substitutes .................. 6E5, 6T5 6AB5 6N5