30-48 MHz Pass/reject duplexers DPR4-4LB, DPR8-4LB

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30-48 MHz Pass/reject duplexers DPR4-4LB, DPR8-4LB

Electrical specifications

Model DPR4-4LB(L) DPR4-4LB(H) DPR8-4LB(L) DPR8-4LB(H)
Operating frequency
band, MHz		 30-40 38-48 30-40 38-48
Insertion loss
(adjustable) not more, dB		 1,5
Frequency separation
TX/RX (min), MHz		 0,8 0.8 0.6 0.6
Impedance, Ohm 50 50 50 50
Isolation, not less, dB 75 75 75 75
VSWR, not more than 1,5 1.5 1.5 1.5
Input power, not
more, W		 not more than 200
Temperature range, °C from -30 to +60
Cavity electrical length 1/4λ

Mechanical specifications

Model DPR4-4LB(L) DPR4-4LB(H) DPR8-4LB(L) DPR8-4LB(H)
Diameter, mm (ins.) 116 (4") 116 (4") 200x200(8"x8") 200x200(8"x8")
Weight, kg 38 34 67.5 61
Connector N-female
Mount to 19-inch rack yes
Length/Width/Depth, mm 120x485x2780 120x485x2480 400x485x2780 400x485x2480

Activity in wrongly forgotten, due to outdated communication equipment, "LOW BAND" range encouraged us to develop highly effective filters and duplexers for this range. And now we are ready to suggest you our new product band pass-reject duplex filter. It is assembled from full-size quarter-wave 4" diameter cavities. This enables to use it in repeaters with various frequency separation TX/RX. It retains steady characteristics at any temperature disturbance thanks to thermostable design. Faintly defined band pass characteristic will protect repeater from interference influence, especially from 27 MHz and at distant radiopropagation.


Typical duplexer response curves

DPR4-4LB

DPR8-4LB

The information provided on this page is not an official offer.
To verify actual parameters contact the sales department before ordering.