1. Vintage Tubes & Sockets Audio For Sale
  2. sku: 11191795104903722
  3. AMPEREX 928008-1

AMPEREX 928008-1 Vacuum Tube 5C22

928008-1 Amperex Rare Vintage 5c22 Vacuum Tube

( Brand: Amperex ), ( Manufacturer Part Number: 928008-1 ), ( Model: AMPEREX 5C22 6279 HUG 928008-1 ), ( Type: Vacuum Tube ), ( Country Of Origin: United States )

Review AMPEREX Rare Vintage Vacuum Tube

The **Amperex 928008-1 (5C22) vacuum tube** is a high-performance, medium-mu pentode designed for precision amplification and signal processing in professional audio, broadcasting, and high-end audio applications. Manufactured by Amperex, a trusted name in vacuum tube technology, this tube is renowned for its exceptional linearity, low noise, and robust construction, making it a staple in both vintage and modern audio equipment. The 5C22 is a versatile pentode, featuring five control grids that enhance its gain and harmonic distortion characteristics, allowing it to deliver rich, detailed sound with minimal interference. Its robust glass envelope is sealed with a metal base, ensuring long-term reliability and resistance to environmental factors, while its internal construction incorporates carefully balanced electrodes to optimize performance across a wide frequency range. Ideal for use in preamplifiers, power amplifiers, and phono stages, the 928008-1 excels in applications where clarity, dynamic range, and musicality are paramount. Whether integrated into classic tube amplifiers or contemporary designs, this tube provides a warm, natural tone with a subtle harmonic richness that enhances the overall listening experience. Its compatibility with a variety of circuit designs further solidifies its reputation as a dependable and high-quality component for audiophiles and engineers seeking superior sound reproduction.

**Pros and Cons of buying a Amperex 928008-1 (5C22 Vacuum Tube)**

### **Pros**

1. **Compatibility and Reliability** The 5C22 is a well-established tube used in various high-end audio amplifiers, particularly in tube preamps and power amps. It is a direct replacement for the original 5C22, ensuring seamless integration into existing circuits.

2. **Sound Quality** Amperex is a reputable manufacturer known for producing high-quality vacuum tubes. The 928008-1 is designed to deliver clean, detailed, and dynamic sound performance, making it suitable for audiophiles seeking superior audio reproduction.

3. **Durability and Longevity** Amperex tubes are generally built to last, with robust construction and reliable performance over extended use. Properly maintained, this tube can provide years of service.

4. **Availability and Aftermarket Support** As a widely used tube, the 5C22 is readily available from various suppliers, including Amperex, Phillips, and other aftermarket brands. This ensures easy replacement if needed.

5. **Versatility** The 5C22 is used in both preamp and power amp applications, making it a versatile choice for tube enthusiasts who may want a single tube that works in multiple setups.

6. **Consistent Performance** Amperex tubes are known for their consistent characteristics, reducing the risk of unpredictable behavior that can occur with lower-quality or older tubes.

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### **Cons**

1. **Cost** High-quality vacuum tubes like the Amperex 5C22 can be expensive, especially when compared to budget alternatives. For casual users, this may not be justified if the tube is only used occasionally.

2. **Maintenance Requirements** Vacuum tubes require proper handling, storage, and occasional maintenance (such as cleaning contacts and checking for leaks). Improper handling can reduce lifespan or cause premature failure.

3. **Sensitivity to Power Supply and Circuit Design** The performance of a 5C22 can be highly dependent on the quality of the power supply and the overall circuit design. Poorly regulated power or a mismatched circuit may degrade its performance.

4. **Limited Lifespan Compared to Solid-State Components** While durable, vacuum tubes have a finite lifespan (typically 5,000 10,000 hours of use). Unlike solid-state components, they cannot be repaired indefinitely and must be replaced when they fail.

5. **Environmental Sensitivity** Tubes are sensitive to temperature, humidity, and electrical interference. Extreme conditions can shorten their lifespan or cause performance issues.

6. **Learning Curve for Beginners** If you are new to tube amplifiers, the 5C22 may require additional knowledge about tube operation, replacement, and troubleshooting, which can be a barrier for some users.

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### **Conclusion**

The Amperex 928008-1 (5C22) is an excellent choice for audiophiles, tube amplifier enthusiasts, and those seeking high-quality sound reproduction in their audio systems. Its reliability, compatibility, and superior performance make it a strong candidate for serious users who prioritize sound quality and longevity. However, the higher cost and maintenance requirements may not be justified for casual listeners or those on a tight budget.

If you are building or upgrading a high-end tube amplifier and plan to use it regularly, investing in the Amperex 5C22 is a worthwhile decision. For budget-conscious users or those new to tube amplifiers, exploring slightly less expensive alternatives (such as Phillips or other reputable brands) may be a more practical starting point.

### **Recommendation**

- **Buy the Amperex 928008-1 if:**

- You are an audiophile or tube enthusiast who values superior sound quality.

- You are maintaining or upgrading a high-end tube amplifier where the 5C22 is a critical component.

- You are willing to invest in long-term reliability and consistent performance.

- **Consider alternatives if:**

- You are on a limited budget and can find a comparable tube (e.g., Phillips 5C22) at a lower cost.

- You are new to tube amplifiers and want to test the technology before committing to high-end components.

- You prioritize cost efficiency over marginal audio improvements.

Ultimately, the decision depends on your priorities whether you value performance, longevity, and audiophile-grade sound over cost savings.

Details:

And fail to Cathode cont. That's pins 2 3, and 4 show cont. This is a for both 2 tubes. I did ohm out the fail and Cathy both tubes seem to be workable.

I can't say they are unused, but could be. I got Fail to cont. I have no way to do further testing.

part #: 9280081 price

  • $50.00

specifications tubesocketvintagego:

  • brand: Amperex
  • mpn: 928008-1
  • model: Amperex 5c22 6279 Hug 928008-1
  • type: Vacuum Tube
  • country of origin: United States

returns tubesocketvintagego:

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

offer tubesocketvintagego:

  • quantity: 1
  • started: April 20, 2026
  • sold: 0
  • availability: In Stock
  • options: Ship-to-home

seller tubesocketvintagego:

  • rating: 100.0%
  • # reviews: 3689
  • city: Panama City, Florida

shipping tubesocketvintagego:

  • service: USPS Ground Advantage
  • carrier: USPS
  • cost: $10.00
  • type: Fixed
  • class: Standard
  • transit: 3-8 Days

general tubesocketvintagego:

  • condition: Used
  • Vintage Audio Video > Vintage Parts Accessories > Vintage Tubes Tube Sockets

payments tubesocketvintagego:

  • other
  • wallet: Google-pay
  • credit card: Diners-club
type: vacuum tube, country of origin: united states,
category: electronics > vintage audio video > vintage parts accessories > vintage tubes tube sockets, sku: 11191795104903722,
Amperex 928008-1 Is Similar To:
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1 offer $50.00 USD
  • Used. Offer #1 priced at $50.00 + $10.00 shipping estimate = $60.00* total. That's pins 2 & 3, and pins 2 & 4 show cont This is a Buy it Now for both (2) tubes.+$10.00 shipping

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