Data Sheet

NJ-QRP Rainbow Tuner/Bridge Specifications

Tuner:

• Circuit Type: Tunable parallel resonant circuit with tapped inductor.
  
• Antenna Impedance Range: Approximately 500 to 5000 ohms with low reactance (N x 1/2 wavelength end-fed antenna)
  
• Output Impedance: 50 ohms with less than 1.5:1 SWR
  
• Power Rating: At least 5W
  
• Frequency Range: 7 to 10.15 MHz

Bridge

• Circuit Type: Resistive Bridge
  
• Power Rating: 200 mW to 4W continuous. At least 5W, low duty cycle
  
• Insertion Loss: Approx 6 dB
  
• Source SWR: Maximum 2:1 SWr reflected back to transmitter regardless of load SWR
  
• Controls ... None! Auto switching and calibrating over specified RF power range

• Display Type: Multicolor LED bar graph.
  
• Display steps:
  Less than 1.5: 1 SWR
  1.5:1 to 2: 1 SWR
  2:1 to 3: 1 SWR
  3:1 to 5: 1 SWR
  Greater than 5:1 SWR

Electrical

• DC Power Requirements: 9 VDC for up to 2 W RF and 12 VDC for up to 5 W RF
  
• Current Drain: approx. 50 mA DC. max.
  
• Supply Voltage: 15 VDC max

Physical

• Construction: Printed Circuit board
  
• Dimensions: Approx 2.25 x 3.25 x .6
  
• Weight: Less than 4 oz.