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Help Identify this Tube/coil

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Help Identify this Tube/coil Empty Help Identify this Tube/coil

Post by Guest on Fri Aug 07, 2015 11:38 pm

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!

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Post by kb4yrc on Sat Aug 08, 2015 3:16 am

Would it be a ballast ? ..... Gregg

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Post by Dale H. Cook on Sat Aug 08, 2015 4:29 pm

I have seen it suggested elsewhere that it is an oscillator coil for a Roamio, but I have not been inside a Roamio.
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Post by Guest on Sat Aug 08, 2015 4:40 pm

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.

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Post by Dale H. Cook on Sun Aug 09, 2015 8:25 am

MEZLAW wrote:I've seen that also but could not find it on any schematic.
I looked through some of the Roamio pages in Rider and I didn't see anything promising either.

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?
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Post by Dale H. Cook on Sun Aug 09, 2015 8:28 am

kb4yrc wrote:Would it be a ballast?
I am quite sure that if it were a ballast he would have recognized it as such. Surprised
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Post by Bill Cahill on Sun Aug 09, 2015 8:43 am

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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Post by Guest on Sun Aug 09, 2015 11:02 am

Help Identify this Tube/coil 100_1179_zpskyjmeufy

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Post by Guest on Sun Aug 09, 2015 11:05 am

One more bit of information, all of these tubes in the box were used in early (1930's and 1040's) automobiles.

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Post by Dr. Radio on Sun Aug 09, 2015 11:50 am

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?
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Post by Bill Cahill on Mon Aug 10, 2015 9:38 am

After seeing the picture, I'd have to agree. It's an oscillator coil. But, unusual.

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Post by Guest on Mon Aug 10, 2015 10:57 am

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?

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Post by 75X11 on Mon Aug 10, 2015 2:55 pm

I guess the next step is to see what kind of equipment Crosley built tor the war dept./DoD.
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