This is normal. The cold resistance is always much less than normal. In a transmitting tube it is called in-rush. For the larger tubes some sort of protection is usually used, or at least a filament transformer no larger than necessary. The tube you are using has a 117 volt filament. 73 Mike ----- Original Message ----- From: "gwt" <[EMAIL PROTECTED]> To: "AM Radio List" <amradio@mailman.qth.net> Sent: Thursday, May 26, 2005 1:10 PM Subject: [AMRadio] 117Z6GT question
> I have a question for the list. > I'm repairing an old am radio that uses at 117Z6GT as a rectifier. I > have the radio working again, but I notice when I turn it on that the > 117Z6 filaments glow really bright for a couple of seconds. Then settle > down to what you would expect to see, a red glow. > I don't have any experience with this tube, or how it should act at turn on. > It what I'm seeing a normal condition? > Thanks, > George KE4HJ > ______________________________________________________________ > AMRadio mailing list > Home: http://mailman.qth.net/mailman/listinfo/amradio > Help: http://mailman.qth.net/mmfaq.html > Post: mailto:AMRadio@mailman.qth.net >
