Hello
I would like to know how to check these tuning eye tubes. I am using A General Electric TC-3 tester. I can check if the tube is good or not, but what settings do I use to check the glow? I am unable to get any glow from a known good tube. Thanks for any advice. Justin

Hi Justin

To check for green glow in a tuning eye you need pin #5, cathode B- and pin #4, target B+. B+ should be 250 volts. Not all tube testers can supply a high enough voltage to light the green eye.

A small power supply can be used. The eye tube draws very little current, 4 ma. 6 volts is also needed for filament between pins #1 and #6.

Norm

: Hello
: I would like to know how to check these tuning eye tubes. I am using A General Electric TC-3 tester. I can check if the tube is good or not, but what settings do I use to check the glow? I am unable to get any glow from a known good tube. Thanks for any advice. Justin

The heater draws 0.3 Amp (300 mA) at 6.3 volts. You might be able to get the voltages from a radio. Don Black.

: Hi Justin

: To check for green glow in a tuning eye you need pin #5, cathode B- and pin #4, target B+. B+ should be 250 volts. Not all tube testers can supply a high enough voltage to light the green eye.

: A small power supply can be used. The eye tube draws very little current, 4 ma. 6 volts is also needed for filament between pins #1 and #6.

: Norm

: : Hello
: : I would like to know how to check these tuning eye tubes. I am using A General Electric TC-3 tester. I can check if the tube is good or not, but what settings do I use to check the glow? I am unable to get any glow from a known good tube. Thanks for any advice. Justin

Hi, Justin.

I found your post doing a web search for TC-3 tube tester; I'm trying to find a manual for the one I have so that I can use it. So far, no dice.

If you could make copies of whatever literature you have for yours, I'd be more than happy to reimburse you for expenses incurred.

Thanks much!

Bill Nielsen (aka: xbil@yahoo.com)