PSVANE Classics KT88C Vakuumröhre für Audioverstärker, das beste passende Paar

The beam power quadrupole KT88 has an anode ultimate power dissipation of 42W. In the audio amplifier, two tubes can achieve 100W power for the AB1 push-pull output, and KT88 can also be used in the electronic voltage regulator circuit.
KT88 is similar to CV5220 and 6550 and can be used interchangeably.
Hot wire heating
UH............ 6.3 V
IH............ 1.6 A
Limit rating
------------- --KT94 KT100 KT94 KT100
Anode voltage.................. 800 800 800 800 V
Second gate voltage......... 600 600 600 600 V
First gate voltage............-200 -200 -200 -200 V
Anode dissipated power............ 42 45 35 40 W
Second gate dissipation power... 8 8 6 6 W
Anode plus second gate dissipated power... 46 49 40 45 W
Cathode current.................. 230 230 230 230 mA
Hot wire cathode voltage......... 200 200 250 250 V
Glass bulb temperature.................. 250 250 250 250 C
First gate resistance
Self-biased
--- ---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
Interelectrode capacitance
--- - - -- Quadrupole connection triode connection
Input capacitance......... 16--- -9.3 PF
Output capacitance......... 12 --- -17 PF
Cross-channel capacitance.........1.2 ----7.9 PF
 
Static parameter
Quadrupole connection
Ua.....................250V
Ug2.................. 250V
a..................... 140mA
Ig2(approx)... 3mA
-Ug1(approx)......15V
Gm..................... 12mA/V
Ri .....................12KΩ
Gg1-g2............... 8

Triode connection
Ua.g2...............250V
Ia+g2...............143mA
-Ug1(approx)... 15V
Gm.....................12mA/V
Ri.....................670Ω
μ..................... 8

Recommended working status (reference value)
Push AB1 type amplification, triode connection (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
Push-pull AB1 type amplification, quadrupole 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
 Push AB1 type amplification super linear connection (fixed bias)
(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
Push-pull AB1 type amplification super linear connection (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
Ūg1-g1.pk) ............... 104 71 V
Zout........................... 4.8 4.5 kΩ
Push-pull AB1 type amplifier quadrupole 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
Ūg1-g1.pk) .................. 67 V
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