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Shuguang Kt88-98 new Hi-Fi vacuum tubes

Shuguang Kt88-98 new Hi-Fi vacuum tubes Shuguang Kt88-98 new Hi-Fi vacuum tubes
Product name:Shuguang Kt88-98 new Hi-Fi vacuum tubes
Item:SG-Kt88-98
Price:$25.8
Details:
 
about this tube 
     The auction is for one  tube and they can be closely matched with the same current data .They are brand new tubes with excellent quality.

KT88 Series

Beam power tube KT88's anticathode limit dissipation power is 42W. In audio frequency amplifier, if two tubes are used to drive AB1, the output power can reach 100W. At the same time, KT88 can also be used in electron firm press electrical route.
KT88 is the same with CV5220、6550, and can be exchanged each other.

 

 



 


 
 


heater heating
UH………… 6.3 V
IH………… 1.6 A

limit rating
------------- --KT94 KT100 KT94 KT100
plate voltage……………… 800 800 800 800 V
second grid voltage………… 600 600 600 600 V

first grid voltage…………-200 -200 -200 -200 V
plate dissipation power………… 42 45 35 40 W
second grid dissipation power…… 8 8 6 6 W
anticathode plus second grid dissipation power………………………………………………… 46 49 40 45 W
cathode current……………… 230 230 230 230 mA
heater voltage between cathodes……… 200 200 250 250 V
temperature of glass crust…………… 250 250 250 250 C

first grid resistance
when it is self-partial voltage
--- --- Pa + Pg2≤ 35W 0.47 MΩ
--- --- Pa +Pg2 > 35W 0.27 MΩ
when it is fixup partial voltage
--- --- Pa +Pg2≤35W 0.22 MΩ
--- --- Pa +Pg2> 35W 0.10 MΩ

capacitance between poles
--- - - --quadrode connect way Tridoes connect way
input capacitance……… 16--- - 9.3 PF
output capacitance……… 12 --- - 17 PF
transroute capacitance……… 1.2 ----7.9 PF


 

 

  static state parameter

quadrode connect way

Ua…………………250V
Ug2……………… 250V
a………………… 140mA
Ig2(approx)…… 3mA
-Ug1(approx)……15V
Gm………………… 12mA/V
ri …………………12KΩ
μg1-g2…………… 8

Tridoes connect way
Ua.g2……………250V
Ia+g2……………143mA
-Ug1(approx)… 15V
Gm…………………12mA/V
ri…………………670Ω
μ………………… 8
 

 

 

 

KT88 series

 

Beam power tube KT88's anticathode limit dissipation power is 42W. In audio frequency amplifier, if two tubes are used to drive AB1, the output power can reach 100W. At the same time, KT88 can also be used in electron firm press electrical route.
KT88 is the same with CV5220、6550, and can be exchanged each other.

 

 

 





 
 


commend working state(reference value)

driving AB1 series amplify,Tridoes connect(auto-partial voltage)
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 amplify,quadrode connect(auto-partial voltage)
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
?(g1-g1.pk) ………60 V

 



 

driving AB1 series amplify super line connect(fixuppartial voltage)
(40%tapping points)
U a.g2(b)………………560 460 V
Ua.g2(0)………………553 453 V
Ia+g2(0)………………2ⅹ50 2ⅹ50mA
Ia+g2(max.sig)…… 2ⅹ157 2ⅹ140mA
RL(a-a)…………… 4.5 4 KΩ
-Ug1(approx)…… 75 59 V
Pout………………… 100 70 W
Dtot ………………………2 2 %
Pa+g2(0)………………2ⅹ27.5 2ⅹ27.5W
Pa+g2(max.sig)………2ⅹ33 2ⅹ27 W
ū(g1-g1.pk)…………140 114 V
Zout…………………… 7 6.5 KΩ

driving AB1 amplify super line connect(auto-partial voltage)
(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
?(g1-g1.pk) …………… 104 71 V
Zout……………………… 4.8 4.5 kΩ

 

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