MARC Repeater Characteristics
| 146.955 Repeater |
| Location | Rockville | Maryland |
| Repeater Trustee | KZ3F | Jeff |
| Frequency Pair | 146.955 | 146.355 |
| Coordinated ERP | 400 Watts | Omnidirectional |
| Actual ERP | 200 Watts | Omnidirectional |
| Main Antenna Height | 760' HASL | 360' HAAT |
| Repeater | ACS | KRP-5000 VHF |
| Controller | CatAuto | CAT-1000 |
| RF Amplifier | ACS | 100 watts |
| Duplexer | Wacom | WP-643, 6-can |
| Voter | ACS | 8 Channel |
| Main Feedline | Andrew | LDF4-50, 60' |
| Antenna | DB-224E | 6dB Omnidirectional |
| Emergency Power | Yes | Generator |
| Battery Backup | Available | 900 AH Absolyte |
| Solar Recharging | Available | 115W SunWise Panel |
| Courtesy Tone | 0.75 Hz dev | 800 Hz, 200 ms |
| Digital Voice | 3.50 kHz dev | TSP53C30 |
| Audio Passband | 300-3500 Hz | 5-Pole RC filter |
| TX Audio Limit | 5.0 kHz Max | Hard limited, filtered |
| PL/CTCSS | None | Pass PL=Yes |
| Kerchunk Filter | 100 ms | Noise burst immunity |
| 442.750 Repeater |
|---|
| Location | Rockville | Maryland |
| Repeater Trustee | KZ3F | Jeff |
| Frequency Pair | 442.750 | 447.750 PL156.7 |
| Coordinated ERP | 400 Watts | Omnidirectional |
| Actual ERP | 400 Watts | Omnidirectional |
| Main Antenna Height | 760' HASL | 360' HAAT |
| Repeater | ACS | KRP-5000 UHF |
| Controller | CatAuto | CAT-1000 |
| RF Amplifier | Mirage | Modified |
| Duplexer | TX/RX | 28-70-02, 4-can |
| Feedline | Andrew | LDF4-50, 60' |
| Antenna | Diamond | X510 HNA |
| Courtesy Tone | 0.75 kHz dev | 900 Hz, 200 ms |
| Digital Voice | 3.5 kHz dev | TSP53C30 |
| Audio Passband | 300-3500 Hz | 5-Pole RC filter |
| TX Audio Limit | 5.0 kHz Max | Hard limited, filtered |
| PL/CTCSS | 156.7 (5A) | Pass PL=No |
| Kerchunck Filter | 100 ms | Noise burst immunity |
| 53.270 Repeater |
|---|
| Location | Germantown | Marlyand |
| Repeater Trustee | KZ3F | Jeff |
| Frequency Pair | 53.270 | 52.270 |
| Coordinated ERP | 400 Watts | Omnidirectional |
| Actual ERP | 50 Watts | Omnidirectional |
| Main Antenna Height | 660' HASL | 180' HAAT |
| Repeater | Motorola | Mitrek T81 Series |
| Controller | Midians | RM-1 |
| Duplexer | Telewave | TPRD-0454 |
| Feedline | Andrew | LDF5-50, 200' nominal |
| Antenna | Andrew | DB-201E, Unity Gain |
| Emergency Power | Yes | Battery + AC Charger |
| Battery Backup | 6-cell | 900 AH Absolyte 13.4V |
| Courtesy Tone | 0.75 kHz dev | 800 Hz, 100 ms |
| Audio Passband | 300-3500 Hz | RC filter |
| TX Audio Limit | 5.0 kHz Max | Hard limited, filtered |
| PL/CTCSS | 156.7 (5A) | Pass PL=Yes |
| Kerchunck Filter | 200 ms | Noise burst immunity |