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Telewave TPCD-4556 406-512 MHz Base Station Duplexer The Telewave Models TPCD-4554 and TPCD-4556 allow simultaneous operation of a transmitter and receiver into a common antenna. These bandpass duplexers have low insertion loss, and are ideal in frequency congested areas where protection is needed from surrounding transmitters, and where maximum transmitter sideband filtering is necessary. Because of their superior construction, these Telewave 5” cavity duplexers achieve greater rejection of transmitter spurious and noise radiation, providing excel lent receiver protection. The TPCD-4554 has two, and the TPCD-4556 has three, ¾ -wave bandpass cavities in the transmitter and receiver sections. These duplexers are designed for transmitters and receivers with frequency spacing of 5 MHz or more. Selectivity and insertion loss may be adjusted by rotating the calibrated connector loops. (See next page for typical response curves.) Telewave duplexers have 1/4- inch aluminum top plates which are fully welded to the aluminum outer conductor. Silverplated tuners, berylium 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. FREE US SHIPPING |
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Telewave TPCD-4556 406-512 MHz Base Station Duplexer (Used) The Telewave Models TPCD-4554 and TPCD-4556 allow simultaneous operation of a transmitter and receiver into a common antenna. These bandpass duplexers have low insertion loss, and are ideal in frequency congested areas where protection is needed from surrounding transmitters, and where maximum transmitter sideband filtering is necessary. Because of their superior construction, these Telewave 5” cavity duplexers achieve greater rejection of transmitter spurious and noise radiation, providing excel lent receiver protection. The TPCD-4554 has two, and the TPCD-4556 has three, ¾ -wave bandpass cavities in the transmitter and receiver sections. These duplexers are designed for transmitters and receivers with frequency spacing of 5 MHz or more. Selectivity and insertion loss may be adjusted by rotating the calibrated connector loops. (See next page for typical response curves.) Telewave duplexers have 1/4- inch aluminum top plates which are fully welded to the aluminum outer conductor. Silverplated tuners, berylium 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. |
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Telewave TPRD-4544 450-470 MHz Pass-Reject Base Station Duplexer The Telewave TPRD-4544/4744 Base Station Duplexers provide high performance with an innovative design. By using two TPRC- 4504 or 4704 Bandpass Band- 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 from the factory. No further adjustments should be required. The positive locking mechanism allows for simple field tuning if frequency changes are required. The 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 75dB. 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 then 3 MHz, please contact Telewave for assistance. |
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Telewave TPRD-4744 470-512 MHz Pass-Reject Base Station Duplexer The Telewave TPRD-4544/4744 Base Station Duplexers provide high performance with an innovative design. By using two TPRC- 4504 or 4704 Bandpass Band- 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 from the factory. No further adjustments should be required. The positive locking mechanism allows for simple field tuning if frequency changes are required. The 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 75dB. 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 then 3 MHz, please contact Telewave for assistance. |
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Telewave TPRD-1444C 135-151 MHz Compact Pass-Reject Base Station Duplexer The TPRD-1444C and TPRD-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 19” rack, with rack height of 5.25” and 4” respectively. The TPRD-1444CM is supplied with adjustable mounting tabs for installation in a cabinet. FREE USA SHIPPING Telewave Datasheet |
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Telewave TPRD-1446C 135-151 MHz Compact Pass-Reject Base Station Duplexer The TPRD-1446C offers high performance in a compact design for the 135-151 MHz VHF band. This duplexer is less than 30% of the size of its predecessor, the TPRD-1454F, and delivers equivalent performance. Custom-extruded 4” cavities allow horizontal rack mounting. Three pass-reject sections for 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”. FREE USA SHIPPING Telewave Datasheet |
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