DBA-270 Dual Band 2 Meter & 70 cm. Preamplifier

 

DBA-270 Mast-Mounted Preamplifier for 2m and 70cms

The Dual Band Mast-Mounted DBA-270 Preamplifier is the ultimate 2 Meter & 70 cm combo preamplifier for those stations running a single dual band antenna. Due to its built-in Diplexer only one connection to a dual band antenna is required as well as only one coaxial cable needs to be connected to the transceiver. 

The maximum RF power handling is 100 Watts in RF Sensed mode (Automatic Switching out of line when RF is detected) and 200 W when running a sequencer. The DBA-270 offers direct feeding of the required 13.8 VDC via the SO239 DC feed socket as well as remote feeding via the coaxial cable.

Many of the current transceivers will via a menu option inject 13.8 VDC on the coaxial cable during receive and drop the VDC on transmit. Should this feature not be available with your transceiver, remote feeding of the preamplifier can be accomplished by using our DCC-5000PRO bias-t or our DCW2000B/HP sequencing system.

N-F Connectors are standard for the Antenna & Transceiver interface.

 

PREAMPLIFIER SPECIFICATIONS

 

 

 

DBA270

DBA270

Frequency Range [MHz]:

at 145

at 435

Noise figure (at 20C) (NF) [dB]:

 0,5

0,7

Gain (S21) [dB]:

 20

 24

Switching power w. RF-Vox [W]:

 100

 100

Permissible power **(PEP) [W]:

 200

 200

Permissible power ** (FM) [W]:

 100

 100

Insertion loss. [dB]:

 0,1

 0,2

Return loss act. TX [dB]:

 30

 30

Return loss (S11) [dB]:

 2,5

 3,5

Output return loss (S22) [dB]:

 20

 12

O-IP3 [dBm]:

 17

 22

I-IP3 [dBm]:

 -3

 -2

Suppl. volt./current [V/mA]:

 12-14/340

 12-14/340

Mast diameter [mm]:

 58

 

2.25"

58

 

2.25"

                   

** When used with sequencing

 

DBA-270 Noise Figure / Gain Analysis 430 440 MHz.

 

 

DBA-270 Noise Figure / Gain Analysis 144 148 MHz.

 

 

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