RCA/NATIONAL 857-B Wave Mercury Vapor Rectifier Tube Half

( Brand: Rca/national ), ( Manufacturer Part Number: 857-B ), ( Part Type: Rectifier Tube )

Review RCA/NATIONAL Rca national Electronics Wave Mercury vapor Rectifier Tube

The 857-B RCA National 857 Wave Mercury-Vapor Rectifier Tube is a vintage electronic component that was once a critical part of radio and early television technology. This half-wave rectifier tube, specifically the 857 variant, was designed to convert alternating current (AC) into direct current (DC) for powering various electronic devices.

The 857-B tube measures approximately 7 inches in length and has a diameter of about 1.5 inches. It is made of high-quality glass and houses a mercury-vapor filled bulb, which is the source of the tube's rectifying abilities. The mercury vapor inside the bulb ionizes when exposed to an AC electric field, creating a one-way path for the electrical current to flow, thereby converting the AC into DC.

The tube features two metal pins on the base, which serve as the input and output terminals. The input terminal is designed to connect to the AC power source, while the output terminal delivers the DC power to the device it is powering. The 857-B tube is rated for a maximum operating voltage of 350 volts and a maximum operating current of 1 ampere.

This tube is a nostalgic piece of electronic history, a testament to the ingenuity and innovation of the early days of radio and television. It is a unique collectible for electronics enthusiasts, hobbyists, and vintage technology enthusiasts. However, due to its age and the potential hazards of mercury vapor, it should be handled with care and should not be used for powering modern devices.

1. Authenticity: This tube is a vintage component, which can add a unique touch to any vintage or retro audio system.

2. Availability: Although this tube is not widely produced anymore, it can still be found in various online stores and on auction sites.

3. Durability: Mercury-vapor rectifier tubes, such as the 857-B, are known for their durability and longevity. They can last for many years with proper care and maintenance.

4. Sound quality: Vintage tubes like the 857-B can produce a warm, rich sound that is often preferred by audiophiles.

1. Cost: Vintage tubes can be more expensive than their modern counterparts. The 857-B is no exception, and its price may vary depending on its condition and availability.

2. Limited compatibility: The 857-B is a half-wave rectifier tube, which may not be compatible with all modern audio systems. It is typically used in older radios and amplifiers that are designed to work with this type of tube.

3. Environmental concerns: Mercury-vapor rectifier tubes contain mercury, which is a hazardous substance. Proper disposal of these tubes is essential to prevent environmental damage.

4. Maintenance: Vintage tubes require regular maintenance and cleaning to ensure proper operation. This can add to the cost and time required to keep the tube functioning.

The 857-B RCA National 857 wave mercury-vapor rectifier tube half-wave is a unique and durable component that can add a vintage touch to any audio system. However, its high cost, limited compatibility, environmental concerns, and maintenance requirements should be considered before making a purchase. If you are an audiophile who values the warm, rich sound produced by vintage tubes, and if you have the necessary equipment to use the 857-B, then it may be worth the investment.

If you are interested in purchasing the 857-B RCA National 857 wave mercury-vapor rectifier tube half-wave, I recommend doing thorough research before making a purchase. Check the compatibility of the tube with your audio system, and make sure you have the necessary tools and knowledge to properly maintain and dispose of the tube. Also, consider the cost of the tube and compare it with the price of modern rectifier tubes. If you are still unsure, you may want to consult with an audio expert or a vintage audio enthusiast to get their opinion.

Details:

Please by sending a message through or calling.

30-day DOA warranty this product carries. Standard shipping prices are only good for the lower 48 states.

All parts, accessories, cables, etc.

Minimum handling charge is 75 onto a standard pallet and increases for custom pallet's.

If you do receive the package, submit clear images of packaging box and damaged item from multiple angles. Our contact: Rodney Wang SC asset management, inc.

Your satisfaction is extremely important to us.

USPS or ups ground.

If in doubt, please before purchasing. DOA stands for dead on arrival, meaning that the item did not function properly when it arrived.

On a scale from, with 10 being in new or excellent condition, this item is rated as 7.

Are only included if pictured or listed in. Compatibility issues are not considered DOA.

Do not discard the packaging. width in inches: 22.

Cash is only accepted for will-calls in-person. This unit has been used.

Please review images thoroughly before purchasing.

length in inches: 22.

All parts, including accessories and cables are only included if pictured or listed in the. Save packaging for carrier claim.

All pictures are taken in house.

Rca National electronics 857-B half-wave mercury-vapor rectifier tube this offer only comes with what is pictured or listed in the.

part #: 857 prices

• $12.00-$33.02

specifications tubesocketvintagego:

• brand: Rca/national
• mpn: 857-b
• part type: Rectifier Tube

Shipping tubesocketvintagego:

• handling: 1 days
• type: Calculated

Seller tubesocketvintagego:

• city: Milpitas, California
• zipcode: 95035

Ratings:

1. Exactly as described. Fast shipping. Thank you. 06-21-17
2. Great price with FAST shipping 06-21-17
3. Excellent seller! Thank you so much! 06-21-17
4. Thank you. 06-21-17

Offer tubesocketvintagego:

• quantity: 1
• Sold: 0
• Started: June 21, 2017, 10:50 pm
• best offer: true
• bids: 0

Returns tubesocketvintagego:

• time: 30 Days
• type: Money back or exchange buyers choice
• paid by: Buyer
• policy: returns accepted
• details: 30 Day DOA Warranty, except for AS-IS ITEMS which are all Final<

General tubesocketvintagego:

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

Payments tubesocketvintagego:

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