Shuguang Treasure Hi-Fi Vacuum Tube
! IMPORTANT UPDATE ! pcX was recently informed, that Grant Fidelity has recently been awarded "exclusive North American distribution rights" for the Shuguang Treasure Series of Vacuum Tubes, from the Chinese manufacturer. Moreover, they recently became owner of the Shuguang Treasure TRADEMARK, in this market region. As a result, beginning February 1st 2010, all new purchases of Shuguang Treasure tubes that pcX makes, will be placed exclusively through Grant Fidelity. The range and type of tubes offered, their retail pricing, and the warranties they carry, will be "concurrent" with the range imported by Grant Fidelity. Going forward, all such tubes will be: a) PREMIUM - GRADE A Series (matched closely for "both" Gm and Ip) NOTE: pcX still has some remaining Shuguang Treasure tube inventory (all types), sourced from Asia - feel free to e-mail us directly, to find out availability and CLEARANCE pricing. Once these are gone, they are gone ! info@partsconnexion.com |
Shuguang is the oldest and largest tube manufacturer in China, established in 1958 by engineers educated and trained in the United States during the late 1930's and early 1940's. Today, Shuguang's vacuum tube production accounts for 40% of the world's total tube output, either under their own brand "Shuguang", or under various OEM brands.
Generic Shuguang tubes come in clear glass bottles. However, the Treasures series have a carbon compound coating applied inside the tubes making them appearing to be "black bottle" or "black glass". The first Shuguang Treasures tubes were released in December of 2008, to celebrate both Shuguang's 50th anniversary and to highlight a variety of important technological advancements in their tube production, such as:
- High Polymer Compound Carbon (HPCC) coating is for the first time used on vacuum tube production. Compared to traditional carbon spray technology, HPCC coating will allow greater concentration of electrons, enhance and maintain stability of the electron flow, maximize "secondary electron emission suppression" from the glass enclosure, in turn reduce effects of electron swirl which generates internal noises from the vacuum tube itself.
- "Super Alloy" technology is for the first time used in constructing vacuum tube. 'Super Alloy' technology was invented and first used in aviation, aerospace, military and other high-tech market segments. After 3 years of testing under extreme conditions, Shuguang has successfully adopted such technology in vacuum tube construction, to achieve directional solidification and single crystallization, greatly improving the ability of electron emission and electron current stability.
- Improved vacuum technology during production process, to further improve the signal background
- Unique triple mica insulating spacers and four independent supporting poles to all but eliminate microphonic effects
- Gold coated grid and gold coated pins, plus white ceramic base
- Key assembling processes are manually completed by a small number of senior technicians with 30+ years of experience. These tubes are truly handcrafted.
- An additional sixty part selection and matching processes are adopted to ensure premium quality tubes, compared to the Shuguang generic clear glass variety.
NOTE: All Shuguang "Black Glass" Treasure Tubes are sold in matched pairs (with an exact Ip (plate current) match), and come with a 90 day warranty.. (ASIAN stock only - not from GRANT FIDELITY)
