Description

Matched Pair Psvane KT88-T Ⅱ Mark ⅡVacuum Tube Treasure Tube Premium Grade New Descriptions: After Psvane-T has been launched out successfully for two years, the Psvane-T Mark Ⅱ finally comes out. Due to use of the new materials, design style and manufacturing process, the performance has been significantly improved based on maintaining the original characteristics of Psvane tube. Descriptions: 1. By virtue of its smart design of power turbo, the electron current density within the vacuum tube reaches up to the maximum value so that the energy, dynamic performance and saturation of voice can be greatly improved. 2. Due to the use of Teflon as its base material, the Psvane Mark Ⅱbecomes more stable and durable. 3. The method of aluminum base oxidization is used for coloring to make sure it will never change color or discolor. 4. It adopts the completely new gold plated base pin so that the contact performance at the connection part can be much better, thus the loss of small-signal can be reduced to the minimum level. 5. The use of carbon crystal technology has greatly improved the stability of electrical property under the condition of working or even ultimate limit within the vacuum tube. Features: KT88-TII, CV5220, 6550 are similar, can be used interchangeably. Filament heating UH ................................. 6.3 V IH ................................. 1.6 A Static parameters Tetrode connection Ua ..................... 250V Ug2 .................. 250V a ..................... 140mA Ig2 (approx) ...... 3mA -Ug1 (approx) ...... 15V Gm ..................... 12mA / V ri ..................... 12KΩ μg1-g2 ............... 8 Triode connected Ua.g2 ............... 250V Ia + g2 ............... 143mA -Ug1 (approx) ... 15V Gm ..................... 12mA / V ri ..................... 670Ω μ ..................... 8 Limit rating Anode voltage ........................ 800 V Second gate voltage .................. 600 V The first gate voltage .................. -200 V Anode dissipation power .................. 42 W Second grid dissipation power ............ 8 W The anode plus second gate power dissipation ... 46 W Cathode current ........................ 230 mA Hot wire cathode voltage ............... 200 V Bulb Temperature ........................ 250 C The first gate resistance Self-bias Pa + Pg2 ≤ 35W 0.47 MΩ Pa + Pg2> 35W 0.27 MΩ Fixed bias Pa + Pg2 ≤ 35W 0.22 MΩ Pa + Pg2> 35W 0.10 MΩ Electrode capacitance The tetrode connected transistor connection Input capacitance ............ 16 9.3 PF Output capacitance ............ 12 17 PF The cross road capacitance ............ 1.2 7.9 PF Driving AB1 amplifier, the triode connected (self-bias) Ua.g2 (b) .................. 400 485 V Ua.g2 (O) .................. 349 422 V Ia + g2 (0) .................. 2 × 76 2 × 94 mA Ig + Ig2 (max.sig) ...... 2 × 80 2 × 101mA RL (a-a) .................. 4 4 KΩ -Ug (approx) ............ 40 50 V Pout ..................... 17 31 W Dtot .................. 1.5 1.5% Pa.g2 (0) ............... 2 × 26.5 2 × 40W Pa.g2 (max.sig) ...... 2 × 19 2 × 27 W Rk ........................ 2 × 525 2 × 525Ω ū (g1-g1.pk) ...... 78 114 V Zout ..................... 2 1.9 KΩ Driving AB1 amplifier tetrode connection (self-bias) Ua (b) ........................ 560 V Ua (0) ........................ 521 V Ug2 ........................ 300 V Ia (o) ........................ 2 × 64 mA Ia (max.sig) ............... 2 × 73 mA Ig2 (0) ..................... 2 × 1.7 mA Ig2 (max.sig) ............ 2 × 9 mA RL (a-a) .................. 9 kΩ Rk ........................ 2 × 460 Ω -Ug1 (approx) ............ 30 V Pout ........................ 50 W Dtot ........................ 3% Pa (0) .................. 2 × 33 W Pa (max.sig) ......... 2 × 28 W Pa2 (0) ............... 2 × 0.5 W Pg2 (max.sig) ...... 2 × 0.7 W ū (g1-g1.pk) ......... 60 V Driving AB1 amplify linear connection (fixed bias) (40% tapping points) U a.g2 (b) .................. 560 460 V Ua.g2 (0) .................. 553 453 V Ia + g2 (0) .................. 2 ⅹ 50 2 ⅹ 50mA Ia + g2 (max.sig) ...... 2 ⅹ 157 2 ⅹ 140mA RL (a-a) ............... 4.5 4 KΩ -Ug1 (approx) ...... 75 59 V Pout ..................... 100 70 W Dtot ........................... 2 2% Pa + g2 (0) .................. 2 ⅹ 27.5 2 ⅹ 27.5W Pa + g2 (max.sig) ......... 2 ⅹ 33 2 ⅹ 27 W ū (g1-g1.pk) ............ 140 114 V Zout ........................ 7 6.5 KΩ Driving AB1 amplify superlinear connections (self-bias) (40% tapping points) Ua.g2 (b) ..................... 500 375 V Ua.g2 (0) ..................... 436 328 V Ia + g2 (0) ..................... 2 × 87 2 × 87 mA Ia + g2 (max.sig) ............ 2 × 99 2 × 96 mA RL (a-a) ..................... 6 5 kΩ Rk .............................. 2 × 600 2 × 400 Ω -Ug1 (approx) ............... 52 35 V Pout .............................. 50 30 W Dtot ........................... 1.5 1.0% Pa + g2 (0) .................. 2 × 38 2 × 28.5 W Pa + g2 (max.sig) ......... 2 × 17 2 × 16 W ū (g1-g1.pk) ............... 104 71 V Zout ........................... 4.8 4.5 kΩ Driving AB1 amplifier tetrode connection (fixed bias) Ua (b) ........................... 560 V Ua (0) ........................... 552 V Ug2 ........................... 300 V Ia (0) ........................... 2 × 60 mA Ia (max.sig) .................. 2 × 145 mA Ig2 (0) ........................ 2 × 1.7 mA RL (a-a) ........................ 4.5 kΩ -Ug1 (approx) .................. 34 V Pout .............................. 100 W Dtot .............................. 2.5% Pa (0) ........................... 2 × 33 W Pa (max.sig) .................. 2 × 28 W Pg2 (0) ........................ 2 × 0.5 W Pg2 (max.sig) ............... 2 × 4.5 W ū (g1-g1.pk) .................. 67 V If you want matched quad, please contact us. All tubes will be factory matched and tested in original package before shipping. We offer one year guaranty. It will be insured when shipped. Packaged includes: (2pcs) Matched pair PSVANE KT88-T Mark ⅡVacuum Tube (4pcs) Matched Quad PSVANE KT88-T Mark ⅡVacuum Tube Payment Refund & Warranty Delivery details Delivery time Contact us Payment We accept payment via Paypal only. Please contact us if you have any questions. Refund & Warranty * 30 Days for exchange or money back from the date you get the item. * If you are not satisfied with the product you received, please don't use it, and return to us within 30 days. * If you find the package is broken, please refuse to sign, then it will be returned to us. * One year warranty, if there quality problems caused by by non-artificial reason, the company replacement, a one year warranty. Delivery details * Orders processed within 24-48 hours of payment verification ( from Monday to Friday, excpet holidays) * All packages will be shipped out in Securely packaged boxes to make sure it is in good condition. * If you have not received your shipment within 30 days from payment, please contact us. We will track the shipment and get back to you as soon as possible with a reply. Our goal is customer satisfaction! Delivery time * For USA buyer: 7-15 Working Days, free shipping via SpeedPAK ; 3-5 Working Days via Expedited Int'l Shipping. (Extra Shipping Cost 20USD ) * For Other Countries buyer: 15-35 Working Days (depends on custom), free shipping Via SpeedPAK with tracking number. 3-7 Working Days via Expedited Int'l Shipping. (Extra Shipping Cost 20USD) Contact us * We welcome all e-mails, and happily respond to every e-mail we receive, usuallywithin 24 hours. 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