Designed for duplex systems that operate with close frequency spacing, these duplexers consist of 8" (203.2 mm) diameter quarterwave coaxial cavities. They are interconnected in a bandpass band reject configuration using double shielded coaxial cable.

·         Noise Suppression - 80 or 100 dB Tx noise at the Rx frequency and 80 or 100 dB Rx isolation at the Tx frequency.

·         Four Cavities - DB4060 uses two cavities for transmit and two for receive and operates at separations of 0.5 MHz or more.

·         Six Cavities - DB4062, with three cavities for transmit and three for receive, operates at separations of 0.3 MHz or more.

·         Bonus Application - Either duplexer can couple two Tx, two Rx or two simplex stations into a common antenna, when frequencies are separated by 0.5 or 0.3 MHz or more.

·         Frequency Stable - An Invar rod, with nearly zero expansion, assures frequency stability over a wide range of temperatures.

·         Mounting - Cabinet mount is standard.

·         Replacement Parts - Tuning Capacitor for -A version - 041024-004 04851 0-005-A, 04851 0-004-B, 048510-003-C Loop Assembly and Tuning Capacitor.

Ordering Information

Four Cavity

Six Cavity

Frequency MHz

DB4060-WC-A
DB4060-WC-B
DB4060-WC-C

DB4062-WC-A
DB4062-WC-B
DB4062-WC-C

138-144
143-156
154-174

For no cabinet change WC to WOC.

Electrical Data

DB4060

DB4062

Frequency Range- MHz
Frequency separation - MHz
Maximum power input (continuous duty) - watts

138-174
0.5 or more
400

138-174
0.3 or more
400

Insertion loss (transmitter to antenna and receiver to antenna) - dB
at 0.3 MHz separation
at 0.5 MHz separation

-
1.5

2.2
-

Transmitter noise suppression at receiver frequency - dB
Receiver isolation at transmit frequency - dB

80
80

100
100

Maximum VSWR (referenced to 50 ohms)
Temperature range - C°
Number of cavity filters

1.5 to 1
-30 to +60
4

1.5 to 1
-30 to +60
6

Mechanical Data

DB4060

DB4062

Cabinet dimensions (DxWxH) - in. (mm)

19.25 (488.95)x20.125 (511.18)
x34.5 (876.3)

19.25 (488.95)x29 (736.6)
x34.5 (876.3)

Connector terminations
Finish

N-Female
Decibel Tek Black^TM

N-Female
Decibel Tek Black^TM

Net weight - lbs. (kg)
Shipping weight- lbs. (kg)

105 (47.63)
130 (58.97)

130 (58.97)
160 (72.57)