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Details about  Tube GS-35B (GS35B,GS35) 2,5kW. NEW IN BOX !

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Tube GS-35B (GS35B,GS35) 2,5kW. NEW IN BOX !
Item Ended
Item condition:
Jan 26, 2012 15:57:35 PST
US $189.50
$59.50 Standard Shipping | See details
Item location:
frm RUSSIA Delivery to US via Texas, United States


eBay item number:
Seller assumes all responsibility for this listing.
Last updated on  Jan 22, 2012 01:12:29 PST  View all revisions

Item specifics

New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is ... Read moreabout the condition





GS-35B 2,5kW Power Tube.

New in Box! 


With 4kV on plate >3.0 kW can be expected on 144MHz in a grounded grid amplifier!


Intermodulation distortion of the 3rd order - minus 32 dB

Anode Dissipation - 2.5 kW

Grid Dissipation - 26 W

Cathode- Oxide coated Heater voltage - 12,6V

Heater current - 2.95A

Maximum CW Anode voltage -5.0 kV

Maximum Instantaneous value Anode voltage-8.0 kV

Maximum CW Cathode current-1.4 A

Transconductance at Ua= 2.0 kV Ia = 350 mA -->32.5 mA/V

Capacitance Input /Output /Feed-through / -21 pF /4.4 pF/0.12 pF-Max.

Seal and Envelope Temperature - 250°C max

Temperature at Anode lead - 200°C max

Temperature at Cathode and Grid leads - 120°C max

Maximum Length -177 mm Maximum Diameter -100 mm

Weight with heat sink: 2.5 kgs

Operating Position -Any

Blower not specified in the manufacturer datasheet,see:  

The so called "Specification Sheet" for the GS-35B was provided for the tubes as they were produced in the Soyus (Union-engl.) factory for the Russian military and select civil aviation customers. These tubes were produced primarily for use in UHF RADAR applications. The factory was manufacturing the tube in such a manner as to guarantee their performance under the specified conditions. The plate dissipation of 1,000 watts was a MINIMAL CONSERVATIVE rating for this tube in service above 800 MHz. Use of this tube in the spectrum occupied by the amateur bands 160 meters through 70 centimeters was never specified nor measured. You can also exceed the rated anode voltage specification of 3,000 volts to as much as 4,500 volts. The majority of users are operating their amps with anode voltages between 2,700 and 3,200 Volts. They make a mistake and the grid current overload. It is better use the maximize anode voltage.

More information? Very recommend!

You wanted 2500W HF+6m?  Click:


or You wanted 6000W?

Caution should also be exercised when operating the tube with filament voltages that may go below the nominal 12.6 volts. If your line voltage drops enough to cause your filament voltage to go below this level, you should adjust the filament voltage so that it will stay at or slightly above 12.6 volts under all conditions. Low filament voltage not only contributes to rapid tube failure, it will also cause your tube to have low output. Some users claim to run the filament voltage as high as 14 volts. Unlike directly heated cathode tubes, significant loss of the oxide coating on the indirectly heated cathode can occur with low filament voltages. High filament voltage can significantly shorten the life of the tube. You may shorten the life of the tube slightly by raising the filament voltage but not nearly as much as you will shorten it running low voltage. Always provide for a method to test and adjust your filament voltage. The best way is the filament voltage stabilizer.

It is sale of brand new GS-35B 2,5kW tube. Thank you!

Delivery to U.S. via Texas storage.
Shipping cost includes heavy tube delivery from Russia to Texas. 

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