Sandy Ridge 600 Repeater – Technical Specifications

Tower:

  • Elevation:  2317 ft. (706.2m) AMSL

Antenna:

  • Height:  160 ft. (48.8m)
  • HAAT:  762 ft. (232.3m)
  • Type:  Omnidirectional
  • Gain:  +6dBd
  • SWR:  1.1:1  (est.)

Feed Line:

  • 180 ft. of 7/8″ hard line  (Andrew Heliax LDF5-50A or equiv.)

Duplexer:

  • Model:  Decibel Products DB-4071
  • RX loss:  0.44dB
  • RX isolation: 52dB
  • TX loss:  0.45dB
  • TX isolation: 52dB

Repeater:

  • Model:  Tait TB7100 (H7)
  • RX sensitivity:  0.35uV (-116dBm)
  • TX power:  40W

Controller:

  • Model:  Communications Specialists TP-3200

Calculations:

  • TX power out of duplexer:  36W
  • Feed line loss:  1.473dB
  • SWR loss:  0.005dB
  • Connector losses:  0.5dB (est.)
  • Total TX signal loss:  1.978dB
  • TX power out of feed line:  23W
  • Effective radiated power (ERP):  91W