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General Purpose Dual By-Pass relay
150 Watts PP RF power rating
Lets by-pass the Input and Output RF ports of devices such as Preselectors, Amplifiers,Filters,etc.
Typical applications are:
- Inserting in line between the antenna and transceiver a preselector, preamplifier or filter device to be by- passed on transmission.
- Switching antennas or RF signals.
A control line permits switch the dual relay. If the control line is connected to a transceiver, on transmission switchover, via PTT or Keying line, the Input and Output RF ports of any device in line are by-passed avoiding being overloaded.
Specialised high performance, low insertion loss set of RF relays are used in order to keep impedances and isolation.
Two models available:
- HF: up to 60MHz.
- VHF: up to 200MHz. |
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Model HF Dual By-Pass relay |
HF dual by-pass relay features:
Two configurations depending on switch configuration. (see below)
- Default By-Passed.
- Default NO By-Passed.
- Dual switching signal relays.
- Frequency range: DC - 60MHz
- Insertion loss: 0.2 dB @ 60 MHz
- Isolation: 90dB typ.
- Power rating: 150 W P.P.
- Impedance: 50 Ohm
- SWR: 1.22 @ 50MHz
- Diode protection.
- Power supply: 12 Volts DC/68 mA
- Switching time:
- Set: 10mS
- Reset: 7mS
- Life expectancy (Mechanical): 20,000,000 operations (at 18,000 operations/hr)
- External Dimensions: 40x37x111mm.(1.57x4.37x1.45in)
- Connectors: SO-239 Antenna/RTX; BNC RX IN/RX OUT
- BNC-BNC coaxial tails and complete shielded control cable with snap-on RFI-EMI suppressor ferrite cores are provided.
WARNING TO AVOID DAMAGE THE UNIT!
In order to give enough time to the relays to switch before the RF power signal outputs the transceiver when the PTT is pressed, assure that your transceiver provides a delayed "SEND" control line signal.
Alternatively a TX/RX Sequencer can be used. |
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Model VHF Dual By-Pass relay
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VHF dual by-pass relay features:
Configuration: Default By-Passed.
- Quad switching specialised RF relays.
- Frequency range: DC- 200MHz
- Insertion loss: 0.003dB
- Isolation: 100 dB typ.
- Power rating: 150 W PP max.
- Impedance: 50 Ohm
- Diode protection.
- Power supply: 12 Volts DC/60 mA (Active state)
- Switching time:
- Set:5mS
- Reset: 4mS
- Life expectancy (Mechanical): 20,000,000 operations (at 18,000 operations/hr)
- External Dimensions:
- VHF model: 55x111x40mm (2.16x4.37x1.57in)
- Connectors: N type for Antenna Input/Output; BNC for Device Input/Output.
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Coaxial tails and complete shielded control cable with snap-on RFI-EMI suppressor ferrite cores
are included.
WARNING TO AVOID DAMAGE THE UNIT!
In order to give enough time to the relays to switch before the RF power signal outputs the transceiver when the PTT is pressed, assure that your transceiver provides a delayed "SEND" control line signal.
Alternatively a TX/RX Sequencer can be used. |
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Dual By-Pass relay. Simplify diagram.
(click to enlarge)
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Dual By-Pass relay. Connection diagram.
(click to enlarge) |
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(Click on picture to enlarge)
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Default By-Passed configuration
When the Dual Relay is not activated, pins 3 and 4 of the contol line connector are open or it is not powered, the device is by--passed. Device Input/Output ports are switched to ground. Default state.
When the Dual Relay is powered and pins 3 and 4 of the contol line connector are joined the internal relays switch and the device Input/Output ports are connected to Line Input/Output respectively. Active state.
A shielded body, 4 ways multipole connector is provided to control lines, carrying 12V DC and PTT/Keying lines.
Pins 3 and 4, 0V and PTT signal respectively, are isolated from ground. They can be connected to ground.
In order to give time to the relays to switch on switch-over assure that your transceiver provides delayed transmission switch over command. That avoid damage the unit.
e.g. derived from the T/R linear amplifier control output.
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Default NO By-Passed configuration
When the Dual Relay is not activated, pins 3 and 4 of the contol line connector are open or it is not powered, Device Input/Output ports are connected to Line Input/Output respectively. Default state.
When the Dual Relay is powered and pins 3 and 4 of the contol line connector are joined the internal relays switch and the device is by--passed. Device Input/Output ports are switched to ground. Active state.
A shielded body, 4 ways multipole connector is provided to control lines, carrying 12V DC and PTT/Keying lines.
Pins 3 and 4, 0V and PTT signal respectively, are isolated from ground. They can be connected to ground.
In order to give time to the relays to switch on switch-over assure that your transceiver provides delayed transmission switch over command. That avoid damage the unit.
e.g. derived from the T/R linear amplifier control output.
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HF Dual By-Pass relay
Any configuration.
Including set of cables . |
£ 110.00 |
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VHF Dual By-Pass relay
Any configuration.
Including set of cables |
£ 145.00 |
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