Modular 7ANT RX switch

This revision is from 2019/05/28 17:27. You can Restore it.

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Quick Start Guide

This is modular 7 RX antenna switch. It allows you tu use up to 7 independant RX antennas (beverages, Bi-dir beverages, RX loops etc.). You can use just one board for single RX output or up to three boards for three independant RX. Also ANT ports can be open or connected tu dummy load. There is 50 or 75 ohms one and also LC BPF isolation for that for multi stations and Bi-dir beverages with two outputs. You can use controller with BPFs and preamp, protections and RX way switching. Also two independant RX per band is possible with optional 7 ANT RX SPLITTER.

This is ideal solution for Single OP through SO2R to Multi-Multi, with up to 2 independant RX per band!

How to use this RX antenna switch

  • This is almost classic antenna switch with high insulation. What is more complicated there are the dummy loads, which are there for:
    • Bi-directional (reversible) beverage antenna with both directions output. link
    • If you want to use TWO INDEPENDANT RX on each band. Than you need middle Splitter. link And it needs right impedance on the ports which are not used.
  • When you use any other antennas and there is no splitter, than you can leave ports open.
  • Have a look here:

⚠ NOTE: TWO coax output beverage antenna works right only, when both ports are loaded with right impedance on the same band. It means that you cannot leave second port open or short! Also if you use first port on 160m and second on 80m than second port have to have load impedance on 160m and first port on 80m. link

⚠ NOTE: all outputs are wideband - simply BPFs work only for the dummy loads

Single Operator - All bands

  • There is one Bi-Dir beverage antenna with two coax output connected to ANT1 and ANT2 ports on the switch. If you want to obtain the best parameters of this reversible antenna, than the second port (which is not in use) must be loaded with right impedance (50 or 75 Ohm depends on design)
  • The rest ANT ports on the switch are used for another RX antennas like loops, classic single wire beverage etc. This ports can stay OPEN.

Single Operator 2 RX (SO2R) / Multi Operator 2 RX

  • There is NO antenna which need dummy loadfor right work. So all ports can stay OPEN = Jumpers are disconnected.
  • All OUTPUTs are ALL bands so you can use controllers on ALL bands too.

⚠ Do not use controllers on THE SAME band. This is not recommended - use two switches and middle splitter.

jumpriky *************

FIRST board (with 160m LC)

  • This is SWR on the ANT port which is NOT used. Jumpers are configured to: LC and 50Ohm.
    • You can see that the antenna port has got good SWR only on 160m. Rest FQ are on High Impedances...

FIRST (with 160m LC) + SECOND (with 80m LC) + THIRD (with 40m LC) BOARDS TOGETHER

  • All three boards are connected.
  • Jumper setting is: LC + 50Ohm
  • You can see nice SWR on that three bands.
  • You can imagine it like the antenna is looking into almost 50Ohm impedance.
    • For Bi-Dir beverage with two coax output it means, that if the antenna port on some band is not used, dummy load is connected and antenna works like it should.

Applications

  • RX antennas switch for Single / multi op DXing and contesting.
  • With the 7ANT RX splitter you can have TWO independant RX on each band!

USING

  • ⚠ NOTE: Every ANT port does have own splitter! You can switch splitters only on some ports! Without supply voltage there is only bypassfrom ANT to RX1 port!