Below are a few of the thousands of specialized components that we use to build our high-power transmitters. We select components based on the experience with quality, delivery, performance, and vendor reliability we have gained building complex mission-critical systems for many years.
Cabinets - Conventional
We can build your transmitter into either standard cabinets or custom cabinets if necessary.
Cabinets - Custom
We can also design and fabricate custom cabinetry to meet special needs. This system is housed in modular cabinetry that can be completely disassembled and shipped in padded ATA cases.
Large diameter coax can be used for high power applications at low frequency. Higher frequencies tend to be lossy at these powers. Pressurization with dry air keeps out moisture that can cause arcing.
We use both high power and low power coax switches. This switch allows the power from multiple tubes to be monitored by a single power meter.
We use finger stock, feed-through filters, honeycomb, and woven metal gasketing to prevent ElectroMagnetic Interference from entering or exiting certain compartments.
We build our own heat exchangers. It lets us give the customer exactly what they need.
High Voltage Power Supply
We use switching power supplies because they are compact and reliable. They can be water cooled or air cooled. We have used units up to 80kV and 48kW. Some tubes require higher voltages so we use components after the power supply to increase the voltage.
High Voltage Relay
Relays for high voltage work on the same principles as mechanical low voltage relays. They are designed and tested to particular specifications. High voltage components need to be installed and wired in a very particular way.
Some of the transformers we use must be isolated to 160kV. High voltage components need to be installed and wired in a very particular way.
Isolator - Small
Isolators prevent output power from reflecting back to the tube and damaging it. High power isolators are only built by a handful of companies, one of which is right here in town.
Isolator - Large
Isolators prevent output power from reflecting back to the tube and damaging it. High power isolators are only built by a handful of companies, one of which is right here in Nashua.
Most of the transmitters we build produce pulsed power. A modulator is required to generate high voltage pulses for the tubes in order to create the power. We select modulators from several suppliers, depending on the application. Modulator types include hard tube, PFN, pulse transformer and solid state. The modulator above is a one megawatt solid state driven pulse transformer type modulator.
We use touch screens to control most of our transmitters. It saves space and adds flexibility that lets us give the customer the interface they need.
We design and build custom PLC-based interfaces that make system operation transparent.
Waveguide allows transmission of RF from the tube output to and through other components like isolators, couplers, and antennas. It needs to be the right size for your frequency and it can only handle so much power. The power rating can be increased by pressurizing with special gasses. Waveguide types include flexible, ridged, double ridged and tall guide.
We often install high power waveguide switches to allow switching between an antenna and a load. Switches also allow multiple tubes to transmit to a single antenna.