Main functions

• Broadband: 0.1 MHz to 60 MHz
• 2-way splitter
• Passive (4.5 dB loss) or Active (up to 14 dB gain)
• Bypass of Preamp by relays
• Low loss, high gain, low noise, high IP3 preamplifier
• Front-end protections – high voltage / current
• 50 / 75 Ohm impedance – easy jumper switch
• Electrostatic protection by neon lamps
• High power protection
• Quality SMA connectors
• Aluminium enclosure: W x H x L = 74 x 29 x 100
• 4pcs self adhesive feet pads included
• DC plug included
• ASSEMBLED and TESTED VERSION

Parameters

• Impedance 50 or 75 Ohm
• NPN transistor 2SC5551A
• Supply voltage 12 – 14 V
• BIAS current 10 to 70 mA
• Supply current up to 180 mA includes relays
• Gain: up to 14 dB
• Low Noise Figure (NF) 1.2 dB (20 mA 50 MHz)
• Low Noise Figure (NF) < 2 dB (60 mA 50 MHz)
• REAL IP3 34 dBm
• Input diode limiter about +17 dBm
• Bypass of Preamp without supply voltage
• Insertion loss with preamp OFF: around 1.5 dB together with the splitter around 4.5 dB
• Insertion loss with preamp ON: from about 20 dB loss (ATT with too high set) to 14 dB GAIN
• Isolation more than 20 dB, 160-40m more than 30 dB
• SWR on OUT (splitted) ports better than 1 : 1.1 on HF, resp. 1 : 1.19 on 6m
• SWR on IN port around 1 : 1.2 to 1 : 1.7 depends on gain of preamp (Optimal is 10 dB)
• Maximal RF current: 100 mA
• Maximal RF voltage: around 65 V