Re: TEK514 needs new 5V4G tube


Roy Morgan
 

Steve,

I would strongly suspect a shorted filter cap in that supply.

If you have an external variable B+ supply, bring the voltage up VERY SLOWLY at the tube cathode while monitoring the current. (Scope power off)

Roy Morgan
K1LKY Western Mass

On Jan 26, 2020, at 6:10 PM, Steve Hendrix <SteveHx@hxengineering.com> wrote:

´╗┐Okay, it's a "valve" for our limey friends!

... One rectifier tube right next to that monster power transformer started getting extra hot within seconds of power-on, and then started arcing and making a nice arc lamp. ...

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