Re: [AMRadio] 117Z6GT question
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
Re: [AMRadio] 117Z6GT question
Thanks for the info! George KE4HJ Radio Station KW1I wrote: Yes, it's normal. - 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 __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
Re: [AMRadio] 117Z6GT question
George: You might search around for some old Globar resistors. Install on the input line and they will absorb some of that inrush resulting in longer life for the tubes. I found a card of them (they were in little packets that one pulled off like the pull tabs you bought at the beer joint) in little bags. They were used in TV sets and AC/DC radios. Check for a parts store that has been in business for a long time and find the guy with gray hair and an unsteady walk. He will know what you are talking about. 73 Jim W5JO 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 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 __
RE: [AMRadio] 117Z6GT question
By The Way: I resemble, I mean resent, that remark about the gray hair and unsteady walk. John, WA5BXO
Re: [AMRadio] 117Z6GT question
Yea, me too! hehe ;-) George KE4HJ John Coleman wrote: By The Way: I resemble, I mean resent, that remark about the gray hair and unsteady walk. John, WA5BXO __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
Re: [AMRadio] 117Z6GT question
John the thing about the remark is that it resembles many of us. Good to know I offended many, not just one or two. George glad you found those. Now don't tell anyone, they might want some too. 73 Jim W5JO By The Way: I resemble, I mean resent, that remark about the gray hair and unsteady walk. John, WA5BXO __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
Re: [AMRadio] 117Z6GT question
Hi Jim, I only found one - hoping for more, but my NOS ran out with the one! George KE4HJ Jim Wilhite wrote: John the thing about the remark is that it resembles many of us. Good to know I offended many, not just one or two. George glad you found those. Now don't tell anyone, they might want some too. 73 Jim W5JO By The Way: I resemble, I mean resent, that remark about the gray hair and unsteady walk. John, WA5BXO __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
