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2PCS PSVANE KT88-TⅡ/C/-UK-KT88 Valve Tube Matched Pair Replace CV5220 6550

Item description

UK-KT88  Version
Packing List
  • 1 pair*PSVANE UK-KT88 vacuum tube (matched pair)
KT88 is a beam power tetreode, its anode limited dissipation power is 42W. In the audio amplifier, the power can be 100W when it is used as push-pull class AB1 with double tubes, it can also be used in electronic voltage regulator circuit. KT88 is similar with CV5220 and 6550,they can be replaced by each other. 

 
 

PSVANE always front in R&D of tubes. Till 2013, PSVANE has accumulated the power to launch nearly 10 types of new items constantly, and all types are the tops in market, which gained numerous praises.

As the most promising products, three new items naming UK are ready to have a grand listing.

UK-EL34, UK-KT88, UK-6SN7, which are PSVANE HI-FI series, have the greatest cost performance that have never seen in history.

These are the items that PSVANE European R&D team has spent nearly one year to produce. Having received constructional dissection in many types of classical English and Swedish prototype tubes that are the same size but were produced in different periods, analyzed one by one and copied materials to ask the most stability and greatest sound performance, even received many times of revises of sound performance that across the ocean, our team still hold the belief that has a sensitive feeling about products as artists and be persistent like craftsmen, also keep the ancient and precise handwork skill:

Three types of items all adopt the most English sound- tasted plate material—“Mould Screen”, and all integrate with the symbolized musicality and emotional attractiveness that PSVANE have, we believe what you are going to get are the most sound-tasted tube that are the same price;

With vintage style as prerequisite, having respected and followed structural design and material use of the earlier classical same size tubes, we preserve the original structure and sound performance of three items. 


KT88-TII  Version:
Packing List
  • 2*PSVANE KT88-TII vacuum tube (matched pair)

 
KT88-TII is a beam power tetreode, its anode limited dissipation power is 42W. In the audio amplifier, the power can be 100W when it is used as push-pull class AB1 with double tubes, it can also be used in electronic voltage regulator circuit. KT88-TII is similar with CV5220 and 6550,they can be replaced by each other.
 
Heater
Uf ……………6.3 V
If…………………………1.6 A
 
Maximum Rating
Ua……………………800 V
Ug2………………600 V
Ug1………………-200 V
Pa………………42 W
Pg2…………8 W
Ua+g2…………46 W
Ik……………………230 mA
Uh-k……………200 V
Tbulb…………………250 C
Rg1
with cathode bias
Pa+Pg2≤35W 0.47 MΩ
Pa+Pg2 > 35W 0.27 MΩ
with fixed bias
Pa+Pg2≤35W 0.22 MΩ
Pa+Pg2 > 35W 0.10 MΩ
 
Direct Interelectrode Capacitances
tetrode connection triode connection
input………16 9.3 PF
output ……… 12 17PF
grid to plate………1.2 7.9 PF
tetrode connection
Ua…………………… 250 V
Ug2……………………250 V
Ia ……………………140 mA
Ig2(approx) ………3 mA
-Ug1(approx)………15 V
Gm ……………………12 mA/V
ri ……………………12 KΩ
Ug1-g2……………… 8
ri ……………………670 Ω
u………………………8
triode connection
Ua.g2…………………250 V
Ia+g2…………………143 mA
-Ug1(approx)………15 V
Gm ……………………12 mA/V
 
 

KT88-C Version
Packing List
  • 1 pair*PSVANE KT88-C vacuum tube (matched pair)

 
 
KT88 is a beam power tetreode, its anode limited dissipation power is 42W. In the audio amplifier, the power can be 100W when it is used as push-pull class AB1 with double tubes, it can also be used in electronic voltage regulator circuit. KT88 is similar with CV5220 and 6550,they can be replaced by each other.
 
Heater
UH………… 6.3 V
IH………… 1.6 A
 
Maximum Rating
------------- --KT94 KT100 KT94 KT100
Ua……………… 800 800 800 800 V
Ug2………… 600 600 600 600 V
Ug1…………-200 -200 -200 -200 V
Pa………… 42 45 35 40 W
Pg2…… 8 8 6 6 W
Pa+g2… 46 49 40 45 W
Ik……………… 230 230 230 230 mA
Uh-k……… 200 200 250 250 V
Tbulb……………… 250 250 250 250 C
Rg1
with cathode bias
--- ---Pa + Pg2≤ 35W 0.47 MΩ
--- ---Pa +Pg2 > 35W 0.27 MΩ
with fixed bias
--- ---Pa +Pg2≤35W 0.22 MΩ
--- ---Pa +Pg2> 35W 0.10 MΩ
 
Direct Interelectrode Capacitances
--- - - --triode connection and tetrode connection
input……… 16--- -9.3 PF
output……… 12 --- -17 PF
grid to plate……… 1.2 ----7.9 P
 
Static parameter
 
tetrode connection
Ua…………………250V
Ug2……………… 250V
a………………… 140mA
Ig2(approx)…… 3mA
-Ug1(approx)……15V
Gm………………… 12mA/V
ri …………………12KΩ
μg1-g2…………… 8
 
triode connection
Ua.g2……………250V
Ia+g2……………143mA
-Ug1(approx)… 15V
Gm…………………12mA/V
ri…………………670Ω
μ………………… 8
 
 
 
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Douk Audio / Nobsound Studio was founded in 2013 in Shenzhen CHINA, we own several brands including Douk Audio / Nobsound / Little Bear etc.
 
As a professional audio company, we are dedicated to design and produce the best products at the lowest prices to make HiFi affordable.
 
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