Thanks for looking at this brand new RUSSIAN MADE MILITARY microwave power triode tube GI-21B suitable for high power amplifier projects for frequencies HF/VHF/UHF up to 1600MHz. With amazing high reliability, modern design and rigid construction, this device is the sure choice for power amplifiers in various applications.

Technical data:

General:

Height                                     88mm

Diameter                                 45mm

Mass                                      120 grams

Electrical parameters:

Heater voltage                         12.6V

Heater current                          0.83 – 0.93A

Fraquency range                      1  -  1600 MHz

Mutual conductance

mA/V                                      23-34

Penetration factor, %               0.65 – 1.4

Cutoff voltage, 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                       >60

Limit Operation Values

Anode voltage, V:

DC in CW operation               800

DC with cold cathode             1000

Cathode current,A:

DC component CW                0.25

Dissipation, W:

Anode

With forced cooling                 110

With no forced cooling             25

Grid                                         2

This device is brand new in original factory styrofoam packing. Will be packed and shipped with care via registered air mail parcel service. Item is located in Bulgaria Europe. Delivery time is 14 - 21 days. Some times things have been late for several days but never have been lost. So bid with confidence. No returns, no warranty.