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Your position: Home / Electron Tubes / Industrial heating tubes

EECTECH power amplifier tetrode FU-728F, electron tube for industrial radio frequency, FU728F transmitter tube

EIH01067
Mainly used for class A and B linear amplification, audio amplification, high frequency class C amplification, especially suitable for 1.6kW single sideband transmitter for final linear amplification.
OM-Power amplifier tetrode FU-728F for OM2000+, OM200
Price:
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$514.44
Wholesale:
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$464.43
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  • Description
  • Reviews(18)


Brand new FU728F, one year warranty against tube quality.




Introduction:
1. EECTECH FU-728F electron tube is a coaxial structure cermet tetrode, forced air cooling, indirectly heated oxide cathode, anode dissipation power is 1.2kW

2. Mainly used for class A and B linear amplification, audio amplification, high frequency class C amplification, especially suitable for 1.6kW single sideband transmitter for final linear amplification.

Characteristic parameter

Hot wire voltage

9V

Hot wire current

8.5~9A

Transconductance

≥14.3mA/V

Static characteristics reference point

-78.5V

Air volume

3m3/min

cooling method

Forced air cooling

Interelectrode capacitance
(Cathode grounded)

 

intput

103pF

Output

13.3pF

Cross road

0.03pF

amplification factor

4.2

Installation location

Vertical installation

Maximum temperature of shell

250oC

maximum height

132.5mm

Maximum temperature of sealing

250oC

Maximum weight

950g

Maximum temperature of terminal

250oC

The maximum diameter

86.5mm


Extreme use data

Minimum filament heating time

3min

Maximum filament surge current

12.5A

Limit value at specified frequency(f=110MHz以下)

Allowable working deviation of heating wire voltage

±5%

Maximum anode DC voltage

3kV

Maximum two-bar DC voltage

400V

Anode dissipation power

1.2kW

Second grid dissipation power

12W

One grid dissipation power

2W


Typical working state (high frequency power amplification or modulation AB1 class)

DC anode voltage

3kV

DC two grid voltage

350V

One gate voltage

-79V

Anode dissipation power

1.2kW

Second grid dissipation power

12W

One grid dissipation power

0

Anode DC current

0.9A

Two-tone output peak envelope power

2.5kW

Single tone output power

1.8kW

 

 


1kW FM broadcaster Class C

Anode voltage

3kV

Second gate voltage

200V

One gate voltage

-55V

Hot wire voltage

9V

Cathode current

450mA

Second gate current

-2mA







For delivery time: 
Generally, we will dispatch the items within 10 days upon order confirmation; some items may need 20~30 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.


Average rating: 5.0 based on 18 reviews
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