RCA TYPE47 Radiotron Globe Vacuum Tube Hickok CA-247

( Brand: Rca ), ( Type: Vacuum Tube ), ( Country/region Of Manufacture: United States )

Review RCA Radiotron Globe Engraved Ca 247 47 Vacuum Tube Hickok Tested

The Type 47 RCA Radiotron Globe 247 is a vintage vacuum tube that carries a rich history and significant value in the world of electronics and audio equipment. This particular tube, model 47, is a dual triode design, often referred to as a "double triode," which means it has two independent triode sections within the same glass envelope.

The Type 47 tube, manufactured by RCA and Hickok, was first introduced in the 1930s and remained in production until the 1960s. It was widely used for applications such as audio amplifiers, radio receivers, and early television sets due to its excellent performance characteristics, including high gain, low distortion, and good linearity.

The tube's glass envelope, known as a "radiotron globe," is a robust and heat-resistant design that allows the internal components to operate at high temperatures without failure. The 98 designation refers to the specific version of the Type 47 tube, which may have slight variations in its specifications compared to other versions.

The Type 47 RCA Radiotron Globe 247 is a collector's item and is still used in some vintage audio equipment restoration projects. Its unique shape, with a long, slender base and a large, rounded bulb, makes it an attractive addition to any vintage electronics collection. The tube's glass envelope is often decorated with intricate patterns, which add to its aesthetic appeal.

When using a Type 47 tube in a vintage audio system, it's essential to ensure that the tube is tested and functioning properly. These tubes should be handled with care to avoid damaging the internal components, as they are quite fragile.

In summary, the Type 47 RCA Radiotron Globe 247 is a vintage dual triode vacuum tube with a rich history and excellent performance characteristics. Its unique design and collectible value make it an attractive addition to any vintage electronics collection.

1. Authenticity and Historical Value: This tube is a vintage Hickok 98, a type of triode vacuum tube that was widely used in radio broadcasting and early television sets. It can be a valuable addition to a vintage electronics collection.

2. Potential for Restoration and Use: If you are an electronics enthusiast, you may enjoy the challenge of restoring a vintage tube to working condition. Once restored, you can use it in a vintage radio or other electronic device.

3. Unique Characteristics: Older vacuum tubes often have different characteristics than modern solid-state components. For example, they may produce a warmer sound in audio applications.

1. Limited Compatibility: Due to its age and specifications, this tube may not be compatible with all modern electronic devices. You may need to use it in an older device or retrofit an older device to use it.

2. Potential for Damage: Older vacuum tubes can be more fragile than modern components. They may be more prone to damage during handling and use, and they may require more careful maintenance.

3. Higher Cost: Vintage vacuum tubes like the Hickok 98 can be more expensive than their modern counterparts. You may pay a higher price due to their rarity and historical value.

If you are an electronics enthusiast and enjoy working with vintage technology, the Type 47 RCA Radiotron Globe 247 47 Vacuum Tube Hickok 98 can be a rewarding purchase. The historical value and unique characteristics of this tube can make it a fascinating addition to your collection. However, be aware of the potential limitations and costs associated with this vintage component.

Before purchasing this tube, make sure you have the necessary equipment and knowledge to restore it to working condition if needed. Also, research the compatibility of this tube with your intended use to avoid any unexpected issues. If you are unsure, consider consulting with an electronics expert or joining a community of vintage electronics enthusiasts for advice.

Details:

I have 4 of these machines and all display a slightly differing value if test the same tube, as two testers are never. Cd still plays well.

Then I have not test it. I also pack well.

Most have one. In regards to the case cover then this grading means or sleeve is badly torn, scuffed, cracked and falling apart. Light scratching to the case cover.

Cd record does not play. If not fully tested, then items are to the full extent and may have something wrong that I discovered.

In these cases it is best buying on as if was broken. Via messaging.

Then they are not included in the sale. Slightly heavier than above.

So this shows what I get, and you get may be slightly different. So take a good look. Please have a look at the pictures for cosmetic condition. Fully working.

It is just my opinion and I would rather paint a bleaker picture of something than saying better. Or if this is in grading regard to the case cover then there may be cracks torn has rips along its edges scuffed quite badly. They will normally want to see the item and packing.

Whilst I endeavor to put tubes together from the same year and look same, this is not always case. This offer is for a. If it does not say base, stand, table in either the main body of or title. Vacuum tube testing I do not sell just passable tubes.

I make mistakes once in a while. So to recap.

It is impossible to describe every scratch, scuff or mark. Sorry for you having to read this but would be surprised how many people think the items come with my table or a part of anatomy that I have accidentally caught on camera.

Use the zoom function and have a good look. All tubes purchased have loads of life left in them. The numbers letters in parentheses are equivalents put to help people find correct tube.

When using the word matched it means in test results rather than cosmetic looks.

That is what they are there for. Cd record still plays ok. It is up to you make a judgment call and decide if worth the risk of buying. By buying on this item you agree to these stipulations and follow the instructions of post office, or carrier.

New - unopened brand new, sealed. Medium to heavy scratching. I use a tv7 u military spec tester which is calibrated.

If it does not say matched then please do consider them to be such. I take lots of pictures so you can see cosmetics.

Very good - used light scratching to both the case and CD record. Rectifiers and diode tubes do not have trans conductance values.

All tubes have passed the gas and short tests.

Or have only gone so far to test it. Light and medium scratching. I am not a huge retail outlet.

In photographs we occasionally use props to display items the best light possible do not mark merchandise values below value or as gifts, 'demos', etc.

Please realize when buying antique, vintage or used equipment that they cannot be in an absolute mint perfect condition, might need some service, now later. If you're unhappy with an item.

Fair - the CD. Record plays, sometimes skips. I try to resolve any issue both our best interests. Low and weak tubes are unceremoniously thrown in the nearest trash can, unless they collectors items.

I am quite harsh on what is good and bad. Heavy scratching to the disc. I may have the same tube but from differing years matched up in test results, which means they cosmetically or internally look a little different.

This means that I have tested something not to its full extent. If I say untested. This is a process, and it takes time. If fully tested then that is what they are.

May be very light scratching but not noticeable or the case cover scuffed a little excellent ware to both CD record. Very good plus - used, some light scratching to either the case or CD record.

I do not publish test results in the listing as what get, and someone else might get can be different. In regards to the case or cover, then cover is just holding itself together. Like new - used but no obvious signs of use. We check and describe the as much of functionality can.

I also sometimes use a hickok 752 for testing if state any values they are guide only.

part #: type47 prices

• $19.13-$117.00

specifications tubesocketvintagego:

• brand: Rca
• type: Vacuum Tube
• country/region of manufacture: United States

General tubesocketvintagego:

• in stock: Yes
• consumer electronics > vintage electronics > vintage audio video parts accessories consumer electronics > vintage tubestubes sockets audio

Shipping tubesocketvintagego:

• cost: $4.11
• type: Calculated
• handling: 2 days

Payments tubesocketvintagego:

• PayPal

Ratings:

1. Great Seller/Tube works great, fast delivery 05-05-17
2. Fast shipping> 04-30-17
3. great 04-30-17
4. Reliable !!! 05-01-17
5. Smooth transactions recommended 05-04-17

Returns tubesocketvintagego:

• type: Money Back
• paid by: Buyer
• policy: returns accepted
• time: 14 Days

Offer tubesocketvintagego:

• Started: May 8, 2017, 12:34 am
• Sold: 0
• bids: 0
• best offer: true
• quantity: 1

Seller tubesocketvintagego:

• city: Kingman, Arizona
• zipcode: 86401

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