NATIONAL UNION OTHER Nos Radio Triode Audio Tubes

( Brand: National Union Other ), ( Manufacturer Part Number: 45ST ), ( Part Type: Radio Tube ), ( Country/region Of Manufacture: United States )

Review NATIONAL UNION OTHER Nos To Strong And 45 St Radio Triode Audio Tubes

The National Union 45-N-45 radio triode audio tubes, also known as 45-watt power tubes, are a classic vacuum tube design that offers superior audio performance for vintage radio and amplifier systems. These tubes, manufactured by National Union Electric Co., have been a staple in the audio industry for decades due to their exceptional sound quality and reliability.

The 45-N-45 tubes are designed as a pair, each tube consisting of a triode configuration with a heater, control grid, and two plates. The tubes are encased in a glass envelope with a metal base, and are equipped with metal grid and plate connectors for easy installation. The tubes measure approximately 9 inches long and 3 inches in diameter, making them a good fit for larger radio and amplifier chassis.

These tubes have a rated power output of 45 watts and are designed to operate at a plate voltage of 450 volts and a grid voltage of 125 volts. They have a plate current of up to 1.5 amps and a plate resistance of around 2,500 ohms. The tubes also feature a high plate dissipation rating of 50 watts, making them suitable for use in high power applications.

The National Union 45-N-45 tubes are known for their rich, warm, and clear sound quality. They offer good gain and have a low plate resistance, making them ideal for use in the output stage of vacuum tube amplifiers. The tubes also have a good dynamic range and can handle high power levels without distortion, making them a popular choice for music enthusiasts and audio professionals.

The tubes are built to last and are constructed using high-quality materials and components. They have a long lifespan and can provide reliable performance for many hours of use. However, it is important to note that these tubes require careful handling and proper maintenance to ensure their longevity. They should be handled with care to avoid damage to the glass envelope or metal components, and should be regularly checked for proper functioning.

In summary, the National Union 45-N-45 radio triode audio tubes are a high-performance vacuum tube design that offers exceptional sound quality and reliability. They are ideal for use in vintage radio and amplifier systems and are a popular choice for music enthusiasts and audio professionals. With their rich, warm, and clear sound quality, good gain, and high power handling capacity, these tubes are a must-have for anyone looking to build or restore a classic audio system.

Buying National Union 45-ST nos 45 radio triode audio tubes can be an intriguing decision for audio enthusiasts who prefer vintage or valve audio equipment. Here are some pros and cons to consider before making a purchase:

1. Authentic Sound: These tubes provide a unique, warm, and rich sound that is difficult to achieve with modern solid-state components.

2. Nostalgia: For those who appreciate the history and aesthetics of vintage electronics, owning and using these tubes can be a rewarding experience.

3. Durability: Well-maintained tubes can last for decades, making them a long-term investment.

4. Availability: National Union tubes are still produced and can be easily purchased from various online retailers and audio stores.

1. Cost: Compared to modern components, tubes can be quite expensive. Additionally, the cost of maintaining and replacing components such as filaments, anodes, and grids can add up over time.

2. Complexity: Tube audio equipment is more complex to operate and maintain than solid-state components. Regular maintenance is required to ensure proper functioning, which may require some technical knowledge.

3. Fragility: Tubes are delicate and can be easily damaged if not handled with care.

4. Energy Consumption: Tubes consume more power than solid-state components, which can result in higher energy bills.

In conclusion, buying National Union 45-ST nos 45 radio triode audio tubes can offer a unique and authentic audio experience, but it comes with some trade-offs. The investment in these tubes can be costly, both in terms of the initial purchase price and the ongoing maintenance and replacement costs. Additionally, the complexity and fragility of tube audio equipment may not be suitable for everyone.

If you are an audio enthusiast who values the unique sound and aesthetics of vintage equipment and is willing to invest the time, money, and technical knowledge required to maintain and operate tube audio equipment, then purchasing National Union 45-ST nos 45 radio triode audio tubes may be a worthwhile investment for you.

However, if you are looking for a more affordable, low-maintenance, and energy-efficient audio solution, then modern solid-state components may be a better choice for you. Ultimately, the decision to purchase National Union 45-ST nos 45 radio triode audio tubes depends on your personal preferences, technical expertise, and budget.

Details:

72 56 with Min. I no longer ship to China Vietnam due lost packages in Custom's. Value being 47 or same as 65% on My Calibrated By Dan Nelson TV-7/DU Tube tester, 6 of these tube tests 100% Good Luck buying.

part #: 45st price

• $8.95

specifications vintaelec:

• brand: National Union Other
• mpn: 45st
• part type: Radio Tube
• country/region of manufacture: United States

offer vintaelec:

• availability: In Stock
• options: Ship-to-home
• sold: 0
• quantity: 1
• started: July 24, 2025

payments vintaelec:

• credit card: Diners-club
• Other
• wallet: Apple-pay

seller vintaelec:

• city: Salem, Oregon
• rating: 100.0%
• # reviews: 9908

returns vintaelec:

• paid by: Buyer
• policy: Returns Accepted
• time: 30 Days
• method: Money back

shipping vintaelec:

• type: Calculated
• cost: $16.00
• service: USPS Priority Mail
• class: Expedited
• carrier: USPS
• transit: 4-9 Days

general vintaelec:

• condition: Used
• Consumer Electronics > Vintage Electronics > Other Vintage Electronics

National Union Other 45ST Is Similar To:

• Nl185d National Electronics Vintage Thyristor Rectifier Nos No Packagin (36.2% similar) ...(December 1st, 2018)
• Nsm3900 National Semiconductor Which Utilizes Chip And Led Module (40.6% similar) This National semiconductor device is a bar graph with 10 individual leds in one module mounted on PCB an ICC chip which drives the led display. National semiconductor NSM3900 0202-B I assume an older version of their LM3914 bar display driver on the back, it reads, Nam chip is actual in a flat ...(March 20th, 2019)
• Rf-2200 National Panasonic Vintage Radio (35.6% similar) This radio is in amazing shape. It honestly looks new. I was surprised when saw how great it looked. Pictured is the light working and sound quality great also. Not knowing much about this, I do know it works and functions like says should online. I do not know how to use the shortwave, so wouldn't ...(December 3rd, 2017)
• Rx-1822w National Panasonic Radio Cassette Recorder Mini Boombox Vintage Tape (32.3% similar) This vintage mini boombox measures approximately 10 x5 X3. There are minor scuffs throughout, and tape residue near the radio sleep selector. For sale, a National RX-1822 radio cassette recorder. National was a brand name used by Panasonic. This unit is clean, tested, and working great...(May 24th, 2018)
• Tek11 Motorola Vintage Radio Communications National Service Plug Adapter (23.8% similar) Vintage Motorola radio communications National service TEK11 plug adapter...(November 11th, 2018)
• Sony Ecm-150 1960s Microphone Cardioid F-95 And Lapel Podium Mic National (10.6% similar) 1960S Sony microphone newsman interview mic for reel recorder cardio id F-95 1/8 National microphone, Sony-electorate lapel /podium MICROPHONE-ECM-150 with original podium stand. Sold used sold as-is...(November 3rd, 2023)
• National Union Other Vt-63 6 Nos Nib To Very Strong And Type 46 St vt-63 Radio Tubes (73.2% similar) Value being 50 good luck...(November 13th, 2023)
• National Union Vt-137 6 Mint Nos Nib 1626 vt-137 Radio Audio Tubes (58.3% similar) Part #: National Union VT-137 for sale...(November 15th, 2023)
• Ge National Union 805 vt-143 2 Matched Nos Testing Pairs And Nu Triode Radio Audio Tubes (60.7% similar) Value being 32 so these test 100% good luck buying. I no longer ship to china Vietnam due lost packages in custom's...(September 22nd, 2024)
• National Semiconductor Ma1026 Digital Led Alarm Clock Thermometer Module Nos (27.8% similar) Up for your consideration is a National semiconductor MA1026 digital led alarm clock / thermometer module. Item is in new, open-box condition...(March 14th, 2025)
• National Union Jan-cnu-6v6gt g Rare Matched Pair 6v6gt g Black Glass Nos 1943 4700 4800 Mho (36.7% similar) These are nos tubes, never used, from a WWII-era USA government contract, making them historically significant and highly collectible. Tested on calibrated Hickok 600A. Features: nos new old stock, never used. Fender champ, deluxe, etc. Hi-fie restorations, or collectors of WWII-era electronics. ...(June 16th, 2025)