Latest Site Pictures

Antenna System:

  • Transmit Antenna: “PE1RKI” Slotted Waveguide, tuned for 3404MHz
  • 1249MHz 333k or 2M DVB-S/S2 Rx Antenna: WIMO “PA23R” Horizontal Polarisation, facing West for the Bromley & Croydon area
  • 437MHz 333k or 2M DVB-S/S2 Rx Antenna WIMO “Big Wheel” Horizontal Polarisation, omni directional
  • Feeders: Andrew LDF4-50
  • 2m (Voice) Rx Antenna: Simple dipole with receiver tuned to 144.750MHz 103.5Hz CTCSS

Transmitter:

  • SR-Systems Minimod 2TS (dual Transport Stream)
  • Kuhne 3.4GHz up-converter (from April 2022)
  • SR-Systems H264 Encoder
  • Power Amplifier: Stealth Microwave SM3437 WiMax Linear Amplifier 20W Class-A
  • 23cm Rx: BATC Minitiouner with “Ryde” Software
  • 70cm Rx: BATC Minitiouner with “Ryde” Software
  • 2m Rx: Anysecu WP-9900
  • ModBus Telemetry by G8YTZ
  • Media Player: PiDeck Systems “PiDeck” (Blackmagic Hyperdeck emulator)
  • Broadcast Switcher and Streamer: Blackmagic ATEM Mini Pro
  • Software Control and media scheduling: Bitfocus Companion

The GB3JV Transmitter Input Equipment (TIE) Bay

Networking and remote control:

  • Cisco Meraki Z1 VPN Firewall/Router
  • Huawei E3373 LTE Modem
  • Network Carrier “SMARTY” Virtual Network Operator on Hutchinson 3G Ltd.
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The JB3JV Network Link: a Cisco Meraki Z1 Firewall/Router and Huawei E3372 LTE Modem

Testing the BATC streamer – BATC “Portsdown” software running on a Raspberry Pi 3+ and the site network equipment.
A “Stealth” Wi-Max Class “A” Microwave Power Amplifier re-purposed for Digital Amateur Television. To the right you see a pair of MeanWell switch-mode power supplies, the larger one for the Power Amplifier and the smaller one for the Drive equipment.
The repeater’s control dashboard as displayed on an iPhone. The telemetry is based on the ModBus RTU protocol (over TCP). Dashboard software is based on Home Assistant (HASS.IO) Open Source software and configured using yaml. Apart from monitoring the repeaters health, it also allows instant shut-down in the event of an OFCOM request.
The LTE Modem mounted in an ABS case for mechanical and protection from dust etc.