receiver 3-way active splitter

3-way active splitter

The splitter is a very useful device. It can provide equal voltages, equal current, or equal power to matched or unmatched loads. This is active splitter version where you can switch ON high IP, low noise preamplifier and eliminate insert loss of the splitter. Gain can be set as you need by the Variable ATT at PCB. This HW is designed only for RX line. There are some more high current and voltage protections on all ports. Both impedances 50 or 75 Ohm can be selected by the jumper.

Main functions:

Info:
- Broadband: 0.1 MHz to 60 MHz
- Could be used up to 150 MHz
- 3-WAY RX splitter
- Passive (< 6 dB loss) or Active (up to 13 dB gain)
- Very low difference between output ports, less than 0,1 dB @ 50 MHz
- Bypass of the preamp by relays
- Low insertion loss, high gain, low noise, high IP3 preamplifier
- Input diode limiter
- 50/75 ohm impedance - easy jumper switch
- Input diode limiter
- Variable gain of preamp easy by ATT at front panel
Quality SMA connectors.
Version with enclosure 74x29x100.
Available as
- Assembled in enclosure: ready to use

Parameters:

Info:
- Impedance 50 or 75 Ohm
- Insertion loss with preamp OFF: around 6 dB
- Insertion loss with preamp ON: compensated by preamp, up to gain around 12 dB (in to out)
- Very low difference between output ports, less than 0,1 dB @ 50 MHz
- Isolation > 17 dB port 1-2 and 2-3, > 23 dB port 1-3
- SWR on OUTPUT ports better than 1:1,1 on HF, resp. 1:1,19 on 6 m
- SWR on IN port around 1:1,2 to 1:1,7 depends on gain of preamp (Gain 10dB = SWR 1:1,2)
- Preamp transistor 2SC5551A
- Supply voltage 12 - 14 V (13,8V recommended)
- BIAS current 10 to 70 mA (preset to 40 mA @ 13,8 V)
- 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 +24 dBm
- Bypass of the preamp without supply voltage