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  Home >> Vacuum tube >> Nature Sound >> K&D >> NA-211T 211T HIFI Nature Sound Audio Vacuum Tube

NA-211T 211T HIFI Nature Sound Audio Vacuum Tube [Comments(0)|Leave your Comment]
Brand:K&D
Item#:13062706300964
Score:1  (Score change Discount Voucher)
Weight:0.65 kg.
List Price:$230.00
Price:$202.00
You Save:$28.00
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HIFI Nature Sound 211-T Audio Vacuum Tube

One matched pair 211-T

T Series:Positioning in exceeding total. Classic style, exquisite craft, comprehensive and balanced sound performance, largest sales volume over the world, best choice for you .

 

         

 

 

 

211 is direct-heated type thorium tungsten cathode triode, can be used as class A, B and C.

Heater
Uf--------------------------------------10 V
If---------------------------------------3.25 A


Direct Interelectrode Capacitances
input----------------------------------6 PF
output----------------------------------5.5 PF
grid to plate----------------------------------14.5 PF

Static parameter

Ua--------------------------------------1250 V
—Ug------------------------------------70 V
Ia--------------------------------------100 mA
Gm-------------------------------------3.8 mA/V
u(当Ia=75mA时)---------------------------12
RL--------------------------------------7 KΩ
Pout------------------------------------10 W

Recommended Operating Conditions ( reference value)

class A(A-F) for two tubes
typical working condition     limited parameter

Ua--------750 1000 1250 1250 V
Pa----------------------------75 W
—Ug-------46 61 80 V
Ug(pk)-----41 56 75 V

Ia(0)-------34 53 60 mA
ri---------4.4 3.8 3.6 KΩ
RL--------8.8 7.6 9.2 KΩ
Pout-------5.6 12 19.7 W


Push-pull. class B(A-F)

typical working condition     limited parameter

Ua------------------ 1000 1250 1250 V
Ia (mAx.sig per tube)-------------------175 mA
Pa (in) (mAx.sig per tube)--------------- 220 W
Pa (per tube)------------------------- 100 W
—Ug------------------72 95 V
Ug(pk)-----------------380 410 V
Ia (0)------------------20 20 mA
Ia(mAx.sig)-----------320 320 mA
Pd(mAx.sig)------------7.5 8 W
RL(a—a)---------------6.9 9 KΩ
Pout------------------200 260 W

ROHS Compliant

Good quality tubes

 

Test and selected by factory
3months quality warranty from date of receipt.


 

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