Welcome to QRO-Parts store! Credit cards accepted My Account  Cart Contents  Checkout  
  Top » Catalog » QRO-Tubes » VHF-UUHF » GI-21B NIB My Account  |  Cart Contents  |  Checkout   
Hi-End Tubes
Other parts
Souz (Union) Siberia
Svetlana St.Petersburg
See QRO-Parts: more
Vacuum Variable Capacitor 4-100 pF/5kV New in Box
Vacuum Variable Capacitor 4-100 pF/5kV New in Box
QRO Search:
Shipping & Returns
Privacy Notice
Conditions of Use
Contact Us E-Mail
GI-21B (GI21B) Microwave Triode.150W to 3000 MHz
[GI-21B NIB]

GI21b,GI-21B Tube. Microwave Triode.

GI-21B(GI21B) Tube. 

Microwave Triode

The MICROWAVE (up to 3000 MHz)TRIODES GI21B(GI-21B) is manufactured in the "Soyuse" (UNION-eng.) factory in Novosibirsk,Russian Siberia.

See factory information:

GI21B(GI-21B) Cathode: indirectly heated, oxide-coated.
GI21B(GI-21B) Envelope:coaxial, metal-ceramic.
GI21B(GI-21B) Cooling: forced air.
Height: at most 88.5 mm with heat sink, 78.7 mm with no heat sink.
Diameter: at most 45 mm with heat sink, 36.3 mm with no heat sink.
Mass: at most 120 g with heat sink, 60 g with no heat sink.

Electrical Parameters

Heater voltaqe: V 12.6
Heater current, A 0.83-0.93
Mutual conductance (at anode voltage, 600 V, grid voltage change 0.5 V, anode current 75 mA), mA/V 23-34
Penetration factor (at anode voltage 600 V, anode voltage change -200 V, anode current 75 mA), % 0.65-1.4
Cutoff voltage (at anode voltage 600 V, grid current 0.5 ?A), V 0 to -1.5
Interelectrode capacitance, pF:
Input 11.2-13.4
output, at most 0.05
transfer 2.7-3.4
Warm up time, s, at most 60

GI21B (GI-21B) Limit Operating Values
Heater voltage, V 11.35-13.85
Anode voltage, V:
DC in CW operation 800
DC with cold cathode 1,000
peak value: (with pulse duration at most 5 ?s) 5kV
Cathode current, A:
DC component CW operation 0.35
peak value: (with pulse duration at most 5 ?s) 4.5A
with forced cooling: 150W
with no forced cooling 25W
grid: 2W

Wavelength, cm:
in CW operation, at least 10
in pulsed operation, at least 9.5
Cathode heating time, s, at least 60
Anode temperature, ?C 200
Temperature at leads of cathode and grid, ?C 140
Resistance in grid circuit, kOm, at least 10

Notes: It is sceptical to read these factory data for Russian tubes.These tubes is designed in USSR in 1988 in the absence of any market. Product not need for advertisment. And manufacturer indicate double smaller  electrical parameters. This reduce its warranty responsiblity before federal or military consumer.

This sale is for GI21B(GI-21B) tube, NEW in Box.

Delivery to US buyers via Texas by 3-5 days!

Current Reviews: 1
This product was added to our catalog on Saturday 25 August, 2007.
Customers who bought this product also purchased
GI-7BT (GI-7B/GI7B,Tropical) Tube. New in Box.
GI-7BT (GI-7B/GI7B,Tropical) Tube. New in Box.
GS-15B Microwave Tetrode.350W >3GHz. New
GS-15B Microwave Tetrode.350W >3GHz. New
GI-7B (GI7B) Tube. New in Box.
GI-7B (GI7B) Tube. New in Box.
Shopping Cart more
0 items
Manufacturer Info
Souz (Union) Siberia
Other products
Notifications more
NotificationsNotify me of updates to GI-21B (GI21B) Microwave Triode.150W to 3000 MHz
Tell A Friend
Tell someone you know about this product.
Reviews more
GI-21B (GI21B) Microwave Triode.150W to 3000 MHz
I receive my tubes, GI7b GS15B, GI21b. Many thanks ..
5 of 5 Stars!
English Deutsch Espa?ol
GS35B Links