Name: TH375 Metal ceramic tetrode with coaxial electrode structure transmitting tube TH 375
Brand: China industrial electronic components
SKU: ETT02022
Availability: InStock

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~~$7300.00~~

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For fast delivery of goods, kindly please read following tips carefully before order:

Since this tube is high value and Customs declarance necessary,
for compliance with China foreigh exchange policy.

the Payment need to be paid through TT to our company bank account,
therefore, please DO NOT pay the order directly online.

please contact EECTECH through sales@eectech.store BEFORE order / BEFORE payment, we will help you to complete the order and payment fluently in a short time. Thank you.

Introduction:
1. The tube type is a cermet tetrode with meshed thorium tungsten electrode, pyrolytic graphite grid, and coaxial electrode structure. It is suitable for final power amplification in a 10kW TV transmitter. The operating frequency can reach up to 300MHz
2. Coaxial metal-ceramic tetrode for frequencies up to 300MHz, forcedair-cooled
3. particularly suitable for TV transmitters in grounded controlgrid screen-grid circuit.

1. General Characteristics
1.1 Cathode Characteristics
Heating..................... Direct
Heater Voltage (Uf, AC or DC).......... 10.0V
Heater Current（If）...................... Appr.86A
1. 2 Feature Characteristics
Cathode Emission Current (Ua=Ug1= Ug2=300V) .............40A
Internal Amplification Factor (Ua=2kV, Ug2=600 to 1000V, Ia=3A) ................7.5
Transconductance (Ua=2kV, Ug2=800V, Ia =2.5 to 3.5A) ..........................70mA/V
Interelectrode Capacitances
Cathode－Control-grid ....................76pF
Control-grid－Screen-grid ..............122pF
Screen-grid－Anode....................... 22pF
Cathode－Anode........................... 0.07pF
Control-grid－Anode .....................0.75pF
Screen-grid－Cathode.................... 5.5pF

2. Maximum Ratings
Frequency f 250 MHz
Anode DC Voltage Ua 5.5 kV
Screen-grid DC Voltage Ug2 1000 V
Control-grid DC Voltage Ug1 －250 V
Peak Cathode Current Ikm 35 A
Anode Dissipation Pa 12 kW
Control-grid Dissipation Pg1 50 W
Screen-gird Dissipation Pg2 150 W

3 Typical operation
TV vision transmitter
(Grounded control-grid screen-grid circuit, negative modulation)
Frequency 220 220 220 MHz
Bandwidth (-3dB) 12 18 12 MHz
Bandwidth (-1.2dB) 7 10 7 MHz
Output power, sync. Level 16 12 12 kW
Output power, black level 9 6.6 6.6 kW
Anode voltage 5.2 4 4.8 kV
Screen grid voltage 900 800 800 V
Control grid voltage -85 -75 -75 V
Peak RF control grid voltage, Sync. Level 170 140 130 V
Anode current, black level 3.8 3.7 3.1 A
Screen grid current, black level 20 110 100 mA
Control grid current, black level 50 60 30 mA
Anode input power, black level 19.8 14.9 14.9 kW
Drive power, sync. Level 46 30 10 W
Anode dissipation, black level 0.8 8.3 8.3 kW
Screen grid dissipation, black level 110 88 80 W
Control grid dissipation, black level 2 25 2 W
Anode load resistance 570 400 600 Ω
Combined vision and sound amplifier for TV translators
(Grounded control-grid screen-grid circuit, vision to sound ratio 10:1)
Frequency 220 220 MHz
Bandwidth 10 10 MHz
Output power, sync. Level 5.5 2.2 kW
3-tone intermodulation ratio ≥58 ≥60 dB
Anode voltage 4.7 3.6 kV
Screen grid voltage 850 850 V
Control grid voltage -70 -70 V
Anode current, black level 2.8 2.25 A
Screen grid current, black level 80 0 mA
Control grid current, black level 20 0 mA
Anode input power, black level 13.2 8.1 kW
Drive power, sync. Level 150 90 W

For delivery time:
Generally, we will dispatch the items within 30 days upon order confirmation; some items may need 60~90 days to get ready for delivery, then we will try our best to dispatch as soon as possible, or we will contact you and offer advice.

For Bulk order:
If you would like to place a bulk order, please contact us for better price and better delivery cost.