Description

4PCS PSVANE KT88C Matched Pair Valve Vacuum Tube In the audio amplifier, the power of 100W can be obtained when the two tubes are used as the AB1 push-pull output, and the KT88 can also be used in the electronic voltage regulator circuit. KT88C is similar to CV5220, 6550 ,KT88 and can be used interchangeably. Warranty 12 Months The beam power tetrode KT88 has an anode limit dissipation power of 42W. In audio amplifier, when two electronic tubes are used as AB1 push-pull output, 100W power can be obtained, and KT88 can also be used in electronic voltage stabilizing 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 grid voltage......... 600 600 600 600 V First grid voltage............ - 200 - 200 - 200 - 200 V Dissipated power of anode............ 42 45 35 40 W Second grid dissipation power...... 8 8 6 6 W Dissipated power of anode plus second grid... 46 49 40 45 W Cathode current.............................. 230 230 230 230 mA Hot-wire cathode to cathode voltage......... 200 200 250 250 V Glass shell temperature.............................. 250 250 250 250 C First grid resistance At self-bias --- ---Pa + Pg2≤ 35W 0.47 MΩ --- ---Pa +Pg2 > 35W 0.27 MΩ At fixed bias --- ---Pa +Pg2≤35W 0.22 MΩ --- ---Pa +Pg2> 35W 0.10 MΩ Interpole capacitance ------- Quadrode connection and triode connection Input capacitance......... 16 --- 9.3 PF Output capacitance......... 12 --- 17 PF Cross-circuit capacitance......... 1.2 --- 7.9 PF Static parameters Tetrode connection Ua…………………250V Ug2……………… 250V a………………… 140mA Ig2(approx)…… 3mA -Ug1(approx)……15V Gm………………… 12mA/V ri …………………12KΩ μ g1-g2…………… 8 Triode connection Ua.g2……………250V Ia+g2……………143mA -Ug1(approx)… 15V Gm…………………12mA/V ri…………………670Ω μ………………… eight Recommended working state (reference value) Push and exchange AB1 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 type AB1 amplifier, 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 and exchange AB1 amplification superlinear 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 superlinear 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 ū g1-g1.pk) …………… 104 71 V Zout……………………… 4.8 4.5 kΩ Push-pull type AB1 amplified 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