Harfington Tube Socket - 9G-55
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Product Information
Full details
The Harfington 9G-55 tube socket shield is an essential component for audiophiles and vintage electronics enthusiasts who need to protect 9-pin vacuum tubes from physical impact while optimizing thermal performance. Featuring an aluminum construction with an integrated spring, this shield is designed for users maintaining tube-based amplifiers or radio gear, though it is specifically limited to 9-pin socket compatibility and requires precise chassis hole spacing for installation.
All features
| Model Part Number | 9G-55 |
|---|---|
| Brand | Harfington |
Extended Product Information
FAQs
Will this fit a 12AX7 tube?
Yes, the 9G-55 is fully compatible with standard 12AX7 vacuum tubes.
How many shields are included in the package?
The package includes 4 individual tube socket shield units.
Is the shield height adjustable?
No, the shield is fixed at a height of 53mm and is not height-adjustable.
Can this be used on power tubes?
This shield is designed for 9-pin preamp tubes; it is generally not suitable for larger power tubes like EL34 or KT88.
Does the shield require screws to install?
The base features a snap-on design; however, depending on your specific chassis, you may need to use existing mounting hardware to secure the socket base.
Troubleshooting
Shield does not snap onto the base.
Verify that there are no obstructions around the socket and that the chassis hole spacing matches the 28mm specification.
Tube rattles despite the shield being installed.
Check that the internal spring is making full contact with the tube glass; if the tube is too thin, the spring may require a minor manual adjustment to increase pressure.
Pros and Cons
Pros
- Integrated spring improves vibration resistance for high-fidelity audio
- Aluminum construction provides superior heat management compared to steel or plastic
- Easy snap-on installation does not require complex soldering
- Includes a set of 4, making it ideal for stereo or quad-tube configurations
Cons
- Limited only to 9-pin tube sockets
- Requires precise 28mm hole spacing on the chassis
- Cannot be used on tubes that exceed 53mm in height
Setup, Compatibility & Care
Installation of the 9G-55 is designed for simplicity. Before starting, ensure your amplifier is powered down and the capacitors are fully discharged.
- Verify your chassis hole spacing measures exactly 28mm.
- Ensure your tube model is a standard 9-pin configuration (e.g., 12AU7, 6n1).
- Align the base of the shield with the mounting points around the tube socket.
- Push the base down until the snap-fit mechanism engages.
To clean, remove the shield from the socket and use a soft, dry cloth to wipe away dust from the exterior. Avoid using harsh chemical cleaners, as they may damage the aluminum finish. Inspect the internal spring periodically for debris that might impede proper contact with the tube glass.