Help Identify this Tube/coil
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Help Identify this Tube/coil
I received a small box of tube from a friend and one of them was rather strange to me.
It is a Crosley G3-51014. It is an octal base tube with a coil inside and no heater!
It is a Crosley G3-51014. It is an octal base tube with a coil inside and no heater!
Guest- Guest
Re: Help Identify this Tube/coil
Would it be a ballast ? ..... Gregg
kb4yrc- Member
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Re: Help Identify this Tube/coil
I have seen it suggested elsewhere that it is an oscillator coil for a Roamio, but I have not been inside a Roamio.
Dale H. Cook- Member
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Re: Help Identify this Tube/coil
Dale H. Cook wrote:I have seen it suggested elsewhere that it is an oscillator coil for a Roamio, but I have not been inside a Roamio.
I've seen that also but could not find it on any schematic.
Guest- Guest
Re: Help Identify this Tube/coil
I looked through some of the Roamio pages in Rider and I didn't see anything promising either.MEZLAW wrote:I've seen that also but could not find it on any schematic.
If it looks like a plug-in RF/IF coil then I think it likely that it came out of something that Crosley built for a military contract. I can't really imagine them building something with removable coils for civilian use. AFAIK they did not build amateur gear. Can you post some pics?
Dale H. Cook- Member
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Registration date : 2014-05-10
Re: Help Identify this Tube/coil
I am quite sure that if it were a ballast he would have recognized it as such.kb4yrc wrote:Would it be a ballast?

Dale H. Cook- Member
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Registration date : 2014-05-10
Re: Help Identify this Tube/coil
Just for informational purposes, a ballast would have vertically mounted coils of resistance wire. I have had a couple of solonoids in vacuim tube glass. There's a coil, and, contact switches. Most commonly used on equipment where dirtry contacts would cause major issues, such as in transmitters.
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Bill Cahill- Admin
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Re: Help Identify this Tube/coil
One more bit of information, all of these tubes in the box were used in early (1930's and 1040's) automobiles.
Guest- Guest
Re: Help Identify this Tube/coil
Definitely looks like a plug-in oscillator coil...
But why...and for what.......?
I would think for Military applications it would be more robust then just a glass envelope and for civilian applications, why would you need the ability to change out this coil on-the-fly?
But why...and for what.......?
I would think for Military applications it would be more robust then just a glass envelope and for civilian applications, why would you need the ability to change out this coil on-the-fly?
Dr. Radio- Member
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Re: Help Identify this Tube/coil
After seeing the picture, I'd have to agree. It's an oscillator coil. But, unusual.
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Bill Cahill- Admin
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Re: Help Identify this Tube/coil
It is an oscillator coil, but I cannot find one on a Crosley schematic as a plug in. I agree the big question is why?
Guest- Guest
Re: Help Identify this Tube/coil
I guess the next step is to see what kind of equipment Crosley built tor the war dept./DoD.
75X11- Member
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