783 Series High Power FM Bandpass Filter
783 Series High Power Bandpass Filter; High stability temperature compensated cavities; Standard port configurations- 1-5/8-inch, 3 1/8 inch EIA, 4 1/16 inch, or 6 1/8 inch EIA; Copper/brass construction with stainless steel hardware (critical components are silver plated); Increased power capability up to 35 kW with appropriate port configuration and forced air cooling; Easily assembled floor standing units (hardware for ceiling suspension available on request or optional vertical floor stands); Factory tuned to customer’s specified channel, yet can be easily field converted to any FM channel; Minor adjustments of cavity resonant frequency can be made during full-power operation of filters.
Features and Benefits
- Cylindrical construction provides better mechanical and electrical stability than square or rectangular cavities.
- Factory tuned to customer’s specified channel, yet can be easily field converted to any FM channel.
- Minor adjustments of cavity resonant frequency can be made during full power operation of filters.
- High stability temperature compensated cavities.
- ERI filters are loop coupled and fixed with bolted connections to couple cavities.
- No Teflon or other insulating material used in the coupling between cavities, eliminating a primary point of failure, present in competitor’s designs.
- Loop coupling provides an adjustment (without disassembly) at the input and output of each cavity
- Marman clamp connection allows close cavity placement.
- Ability to change frequency quickly and with a minimum of disassembly.
- Filter can be easily broken down for shipment and placement
- Temperature indicator provided on all filter sets
- Optional non-adjacent coupling and group delay compensation available
- Easily assembled floor standing units (hardware for ceiling suspension available on request).
Specifications
- Band:FM
- Frequency Range:88 to 108 MHz
- Number of Cavities:Three (3) or Four (4)
- Power Handling:20 kW convection cooled
- 35 kW with optional forced air cooling
- Mounting Configurations:Floor or optional vertical floor stands
- Insertion Loss< 0.35 dB at ± 150 kHz
- VSWR:< 1.1:1 at ± 150 kHz
- Group Delay:< 75 ns overall variation ± 150 kHz carrier
- < 25 ns with optional group delay compensation
Models Available:
- 783-3ERI Model 783-3 FM Band Pass Filter, three cavities, floor mounted, convection cooled.
- 783-3AERI Model 783-3A FM Band Pass Filter, three cavities, floor mounted, forced air cooled.
- 783-4ERI Model 783-4 FM Band Pass Filter, four cavities, floor mounted, convection cooled.
- 783-4-NAERI Model 783-4-NA FM Band Pass Filter, four cavities with optional non-adjacent coupling, floor mounted, convection cooled.
- 783-4AERI Model 783-4A FM Band Pass Filter, four cavities, floor mounted, forced air cooled.
- 783-4A-NAERI Model 783-4-NA FM Band Pass Filter, four cavities with optional non-adjacent coupling, floor mounted, forced air cooled.
Product Brochure
783 FM Band Pass Filter Brochure