Duplexer, Q-Circuit, Res-Lok, 6 cavity. ** Frequencies are required at time of order **

Duplexer, Q-Circuit, Res-Lok, 4 cavity.

The TPRD-1444C and 1444CM produce high performance in a compact design for the 135-151 MHz VHF band. These duplexers are only one-third of the size of earlier models, and deliver equivalent performance.

The TPRD-1444C/CM produces 70 dB isolation at 600 KHz, with a 350 watt power rating, and insertion loss is 1.5 dB or less. Each duplexer fits a standard 19Ó rack, with rack height of 5.25Ó and 4Ó respectively. The TPRD-1444CM is supplied with adjustable mounting tabs for installation in a cabinet.

Low Band, Aviation, and VHF Duplexers

The Telewave TPRD-1554 has two pass-reject cavities in the transmitter and receiver sections. This duplexer is designed for transmitters and receivers with frequency spacing of 600 KHz or more.

The TPRD-1556 has three passreject cavities in the transmitter and receiver sections. This duplexer is designed for transmitters and receivers with frequency spacing of 400 KHz or more.

Vari-Notch® duplexers are used to provide simultaneous operation of a transmitter and receiver (or two transmitters) which are operating at different frequencies while connected to a common antenna. These duplexers are frequently used in radio repeater systems.

144-190 MHz 6-Cav Pass/Notch Base Duplexer, .5 MHz Spacing"

The Telewave TPCD-1553, TPCD-1554, and TPCD-1556 allow simultaneous operation of a transmitter and receiver into a common antenna. These bandpass duplexers are ideal in frequency congested areas where protection is needed from surrounding transmitters, and where maximum transmitter sideband filtering is necessary.

The Telewave TPRD-1544F allows simultaneous operation of atransmitter and receiver into a common antenna. This pass-rejectduplexer utilizes folded four-inch cavities to achieve high "Q" in acompact size.

The Telewave TPRD-1566 allows simultaneous operation of a transmitter and receiver into a common antenna. This pass/reject duplexer has low insertion loss, and is ideal for systems with close frequency separation.

The TPRD-1566 has three pass/ reject cavities in both the transmitter and receiver sections. This duplexer is designed for transmitters and receivers with frequency spacing of 300 KHz or more. Selectivity and insertion loss may be adjusted by rotating the calibrated connector loops.

Because of their super i o r construction, these Telewave 6" cavity duplexers achieve greater rejection of transmitter noise and spurious radiation, providing excellent receiver protection.

Telewave duplexers have 1/4" aluminum top plates which are fully welded to the aluminum outer conductor. Silver-plated tuners, beryllium copper finger stock contactors and threaded Invar rods assure maximum temperature stability, higher "Q", and many years of trouble free operation.

All duplexers are tuned and tested with customer-specified frequencies prior to shipping. If frequency changes are required, the positive locking mechanism allows for easy field tuning by rotating the threaded Invar rod.

The optional TBC-40 indoor cabinet completely encloses the duplexer, and protects it from dust, dirt and tampering. All connections are accessible from the top of the cabinet.

Telewave models TPRD-1584 and TPRD-1586 allow simultaneous operation of a transmitter and receiver into a common antenna. These Pass-Reject duplexers are an ideal choice for systems requiring maximum isolation, with close frequency spacing down to 300 KHz.

The TPRD-1546C offers high performance in a compact design for the 148-174 MHz VHF band.

Custom extruded 4Ó cavities allow horizontal rack mounting. Three pass-reject sections in the transmit and receive paths provide 80 dB isolation at 500 KHz, with a 350 watt power rating, and insertion loss of 2.5 dB or less. The duplexer fits a standard 19" rack, with rack height of 8.75".

The TPRD-1544C and 1544CM produce high performance in a compactdesign for the 148-174 MHz VHF band. These duplexers are less than30% of the size of earlier models, and deliver greater isolation andpower handling.

Low Band, Aviation, and VHF Duplexers

The Telewave TPRD-4546 UHF Duplexer allows simultaneous operation of a transmitter or combiner and receiver into a common antenna. This band-pass/ band-reject duplexer provides maximum TX-to-RX isolation with minimum insertion loss. Six 4" high "Q" cavities in a pass/reject configuration provide bet ter isolation with close frequency spacing than an equivalent bandpass-only duplexer.

The TPRD-4546 can also be configured for at least 1.2 MHz pass and reject bandwidth with rated attenuation.

The superior construction of Telewave duplexers allows the highest possible rejection of transmitter spurious radiation and noise, providing maximum protection for the receiver system.

Heavy-duty materials are used throughout to insure top performance and long service. Each cavity is constructed with a 1/4" aluminum top plate which is fully welded to the cavity body.

RG-214 Mil-Spec cable is used for the interconnect, and temperature stability is maintained by the use of a threaded Invar tuning rod. Tuners are all silver-plated, and sliding contacts are manufactured from beryllium copper fingerstock.

The TPRD-4546 is rack mounted on a 7" x 19" panel. Selectivity and insertion loss are adjustable as required. All duplexers are tuned and tested with customer specified frequencies prior to shipping, and no further adjustment should be required before installation.

The Telewave TPRD-4544/4744 Base Station Duplexers provide high performance with an innovative design. By using two TPRC-4504 or 4704 Pass / Reject cavities in the transmitter and re ceiv er path, these duplexers provide maximum TX to RX protection in the most severe RF environments.

The design of these duplexers provides a bandpass characteristic with minimum insertion loss, while also providing maximum TX to RX protection. Adjustable coupling optimizes the required attenuation for ideal RX performance. All cavity inputs are electrically shorted to ground for maximum static and noise protection.

RG-214 Mil-Spec cable is used for all interconnections to ensure long life, and lowest insertion loss with maximum power handling capability. Heavy-duty materials are used in construction of these duplexers, including silver-plated tuners and beryllium copper fingerstock contactors, assuring high "Q" performance with no problems due to dissimilar met als. Tuning is simple and remains stable from -30°C to +70°C, thanks to the threaded Invar rod.

All duplexers are tuned and tested with customer-specified frequencies prior to shipping. No further adjustments should be required.

The positive locking mechanism allows for simple field tuning if frequency changes are required.TPRD-4544/4744 duplexers mount on a 19" standard rack, with panel height of 5.25". Power handling is 250 watts. Receiver desense protection is at least 90 dB, and TX sideband suppression is at least 75 dB.

With TX to RX spacing of 3 MHz or more, this duplexer can also combine two transmitters into one antenna, or feed two receivers. For spacing less than 3 MHz, please contact Telewave for assistance.