HOPKINS NE474K Pio Capacitors Audio Tube Amplifier .47 400V
( Brand: Hopkins ), ( Manufacturer Part Number: NE474K ), ( Part Type: Capacitor Tube Amplifier ), ( Country Of Origin: United Kingdom )
Review HOPKINS Vintage Pio Capacitors .47 400v Tested Inch Uk Audio Tube Amp
The Hopkins NE474K PIO capacitors are a must-have component for audio tube amplifier enthusiasts and electronic hobbyists. These capacitors are specifically designed for use in high voltage audio applications, making them an ideal choice for building or repairing vintage tube amplifiers.
The NE474K PIO capacitors are rated for a working voltage of 400 volts, making them suitable for power supply and filtering circuits in high voltage audio equipment. The capacitance value of 47 microfarads provides ample capacitance for filtering and smoothing the DC voltage in these applications.
These capacitors are constructed using high-quality paper dielectric material, which is known for its excellent insulating properties and ability to handle high voltages. The paper dielectric is also treated with a special polyester film coating, which provides an additional layer of protection against moisture and other environmental hazards.
The NE474K PIO capacitors feature a lead length of approximately 3 inches, which is long enough to allow for easy installation in most tube amplifier circuits. The capacitors are also available in a variety of other capacitance values, making it easy to find the right component for your specific application.
The Hopkins NE474K PIO capacitors are known for their reliability and consistent performance. They are manufactured to strict quality standards, ensuring that they meet the demanding requirements of high voltage audio applications. Each capacitor is tested and inspected prior to shipment to ensure that it meets the specified performance characteristics.
Overall, the Hopkins NE474K PIO capacitors are a high-quality and essential component for anyone building or repairing high voltage audio tube amplifiers. With their consistent performance, reliable construction, and long lead length, these capacitors are sure to meet the needs of even the most discerning hobbyist or professional electronics technician.
Hopkins Ne474K PI-O capacitors are commonly used in audio tube amplifiers due to their high voltage rating and good electrical characteristics. Here are some pros and cons of buying these capacitors for your 400V audio tube amp:
Pros:1. High Voltage Rating: These capacitors have a voltage rating of 47kV which makes them suitable for use in high voltage audio applications like tube amplifiers.
2. Good Electrical Characteristics: The Ne474K capacitors have low ESR (Equivalent Series Resistance) and low ESL (Equivalent Series Inductance) which results in better sound quality and improved power efficiency in the amplifier.
3. Long Term Stability: These capacitors have good stability over temperature and time, which means they are less likely to drift out of specification or fail over time.
4. Reliability: Hopkins Ne474K capacitors are known for their reliability and durability, making them a good investment for your audio tube amplifier.
Cons:1. Cost: These capacitors can be relatively expensive compared to other capacitor types.
2. Size: Due to their high voltage rating and large capacitance value, these capacitors can be quite large and heavy, which may require additional space and support in your amplifier enclosure.
3. Handling Precautions: These capacitors require special handling precautions due to their high voltage rating. They should be handled with insulated tools and avoid touching the terminals directly to prevent electrical shock.
Conclusion:The Hopkins Ne474K PI-O capacitors offer excellent electrical characteristics, long-term stability, and reliability, making them an ideal choice for high voltage audio tube amplifiers. However, their high cost, size, and handling precautions may be a consideration for some users. If the benefits outweigh the costs for your specific application, then these capacitors are definitely worth considering for your 400V audio tube amp.
Recommendation:If you are building or repairing a high voltage audio tube amplifier and are looking for capacitors with excellent electrical characteristics and long-term stability, then the Hopkins Ne474K PI-O capacitors are a great option to consider. However, if cost or size is a concern, you may want to explore alternative capacitor types or brands that offer similar electrical characteristics but at a lower cost or smaller size.
Details:
NOS vintage paper-in-oil capacitors tested for capacitance only. In the capacitance test pictures first two capacitors are being sold together, and last together.
part #: ne474k price
- $27.00
specifications vintacapacitor:
- brand: Hopkins
- mpn: Ne474k
- part type: Capacitor Tube Amplifier
- country of origin: United Kingdom
shipping vintacapacitor:
- class: Standard
- cost: $7.29
- service: USPS Ground Advantage
- carrier: USPS
- type: Calculated
- transit: 4-10 Days
general vintacapacitor:
- condition: Open box
- Vintage Audio Video > Vintage Parts Accessories > Vintage Capacitors
payments vintacapacitor:
- wallet: Paypal
- credit card: Visa
- other
offer vintacapacitor:
- options: Ship-to-home
- availability: In Stock
- quantity: 2
- started: March 3, 2026
- sold: 0
returns vintacapacitor:
- policy: No Returns
seller vintacapacitor:
- city: Roanoke, Virginia
- rating: 100.0%
- # reviews: 702
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