8-Inch 6-Cavity VHF Duplexer (BPBR)
136-175 MHz, 350 W, > 85 dB suppression, 1.8 dB IL @ 500 kHz separation. Premium 8-inch chassis.
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Frequency136–175 MHz
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Power35 W
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Isolation> 85 dB
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Insertion loss< 1.8 dB
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ConnectorN-Female
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Weight38 kg
Specifications
| Frequency range | 136–175 MHz |
|---|---|
| Power handling | 35 W |
| Insertion loss | <1.8 dB |
| Tx-Rx isolation | >85 dB |
| VSWR (max) | 1.5 |
| Impedance | 5 Ω |
| RF connectors | N-Female |
|---|---|
| Weight | 38 kg |
| Dimensions (H × W × D) | 850 × 422 × 672 mm |
| Cavity Count | 6 |
|---|---|
| Cavity Topology | 4 BR + 2 BP |
| Cavity Diameter Inch | 8 |
| Separation Min Khz | 500 |
| Frequency Stability | 0.8 ppm/°C |
| Temperature Range | -30°C to +60°C |
| Mounting | 19-inch rack |
All measurements at 25 °C, 50 Ω, unless otherwise noted.
Why this product
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01
8-inch cavities for higher Q and 350 W continuous-duty handling
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02
Same > 85 dB suppression as 6-inch with steeper skirt response
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03
Premium choice for congested sites or high-density tower co-location
Technical brief
When the 6-inch is not enough
The 8-inch cavity raises Q-factor and thermal margin. Same > 85 dB suppression as the 6-inch BPBR but with 350 W continuous-duty handling and steeper skirt response — useful at congested sites where the 6-inch unit runs hot or comes close to spec.
Trade-offs
Deeper chassis (672 mm vs 411 mm), heavier (38 kg vs 30 kg) — verify rack depth before ordering. For most VHF repeaters, the 6-Inch 6-Cavity VHF Duplexer (BPBR) is the right answer.
Related products
6-Inch 6-Cavity VHF Duplexer (BR)
136-175 MHz, 350 W, 60 dB ±1 MHz @ 500 kHz separation, 2.0 dB IL @ 1 MHz. All-band-reject 6 cavity.
- Freq
- 136–175 MHz
- Power
- 35 W
- Isolation
- > 6 dB
6-Inch 6-Cavity VHF Duplexer (BPBR)
136-175 MHz, 300 W, > 85 dB Tx noise suppression, 1.8 dB IL @ 500 kHz separation. 4 BR + 2 BP cavities.
- Freq
- 136–175 MHz
- Power
- 3 W
- Isolation
- > 85 dB
5-Inch 6-Cavity VHF Duplexer (BPBR)
136-175 MHz, 250 W, > 80 dB Tx noise suppression, 1.8 dB IL @ 500 kHz separation. 4 BR + 2 BP cavities.
- Freq
- 136–175 MHz
- Power
- 25 W
- Isolation
- > 8 dB
5-Inch 6-Cavity UHF Duplexer (BR)
380-470 MHz, 300 W, > 60 dB @ 4 MHz (10 MHz window), 1.5 dB IL @ 4 MHz. All band-reject.
- Freq
- 380–470 MHz
- Power
- 3 W
- Isolation
- > 6 dB
5-Inch 6-Cavity UHF Duplexer (BPBR)
380-470 MHz, 250 W, > 95 dB suppression, 1.5 dB IL @ 5 MHz separation. 4 BR + 2 BP cavities.
- Freq
- 380–470 MHz
- Power
- 25 W
- Isolation
- > 95 dB
Airband 6-Inch 6-Cavity Duplexer (BPBR)
112-137 MHz, 300 W, > 85 dB suppression, 1.8 dB IL @ 500 kHz separation. 4 BR + 2 BP cavities.
- Freq
- 112–137 MHz
- Power
- 3 W
- Isolation
- > 85 dB
Need a custom configuration?
Talk to an application engineer about variants, custom tuning, or integration into an existing repeater chassis.