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K9AY/4-way antenna switch controller manual

This K9AY/4-way antenna switch allows you to control:



k9ay/4-way antenna switch controller qro.cz hamparts.shop

k9ay/4-way antenna switch controller qro.cz hamparts.shop

k9ay/4-way antenna switch controller front panel qro.cz hamparts.shop

Jump to

RX ANT WAY switch
Connectors
Jumpers settings
Rload resistor fine tune
Internal BPF and preamp PCB - ONLY in 4-way system not K9AY++


RX ANT WAY switch

There are two ways how to connect your RX antenna controller to your TRX (RX):

1. using RX antenna port on your TRX - rear panel on your TRX on in Menu

Must be RX ANT ONLY PORT on TRX, no TX!

k9ay/4-way antenna switch controller cable connecting qro.cz hamparts.shop

2. using TX ANT port on your TRX (ANT1) and switch antennas by the controller

RED LED TX must light ON when you TX! Do NOT forget to connect PTT RCA cable from TRX to controller PTT must be used!

k9ay/4-way antenna switch controller rx tx switching qro.cz hamparts.shop

TX signal way during TXing

k9ay/4-way antenna switch controller rx tx switching qro.cz hamparts.shop

  • You can use RX antenna switch on controller
  • this is ideal for TRX without RX only antenna port
  • also for the rest TRX for fast RX antenna switching
  • fast switching between TX antenna and RX antenna by knob on controller
  • If you want to use this feature you MUST use PTT IN to control relay for TX antenna!
  • There is easy PTT loop on rear panel between two RCA connectors
  • PTT control works only in sniffer mode
  • PTT can continue to your PA over this box
  • works also when the controller is OFF
  • there is no delay
  • compatible with 5V PTT logic (as OM-power PAs)



RX SOURCE knob for fast switching of the RX way

k9ay/4-way antenna switch controller by qro.cz hamparts.shop


Connectors

There are two ACC connectors:

  • RJ45 and SUB-D
  • First 8 wires are the same

k9ay 4-way antenna switch controller connector rj45 qro.cz hamparts.shop

k9ay 4-way antenna switch controller connector d-sub15 qro.cz hamparts.shop


Jumpers settings

Direction LED diode indication

k9ay/4-way antenna switch controller led diode indication qro.cz hamparts.shop

k9ay/4-way antenna switch controller antenna direction orientation qro.cz hamparts.shop

K9AY or 4-way Bi-DIR switching matrix

  • Select between switching matrix
  • K9AY and 4-way Bi-DIR system do have different switching matrix table

k9ay/4-way antenna switch controller switching matrix qro.cz hamparts.shop

K9AY over coax

  • Short jumpers for K9AY direction switching over the coax

k9ay/4-way antenna switch controller k9ay over coax qro.cz hamparts.shop

4-way Bi-DIR beverage settings

  • Short jumpers for right 4-way Bi-DIR beverage orientation - more info in article

k9ay/4-way antenna switch controller bi-dir beverage settings qro.cz hamparts.shop


Rload resistor fine tune

  • This function is only for K9AY feeder with Variable Rload part
  • There are two ways for fine tunning of Rload
  • Please check some more info about Feeder box of K9AY++ - more info in article ODKAZ

Final Rload resistance may vary with the direction switching. This is caused by thin GND wire between controller and RF feeder box. If the changing is lower than 10 % then all is OK, if more, then add more/fat GND wires are recommended. Using CAT-5 FTP (shielded) cable can be big advantage in this problem.

For final tunning and measuring, please connect control cable as well also the coax one!

k9ay/4-way antenna switch controller rload fine tune qro.cz hamparts.shop


Internal BPF and preamp PCB - ONLY in 4-way system not K9AY++

  • It means that if you want to use K9AY++ controller also for 4-way beverage system, then you will have BPFs and Preamp ONLY for K9AY++
  • If you want to use this internal PCB board, then it is better to buy 4-way system controller + simply K9AY feeder

Internal BPF and preamp PCB

preamplifier gain

  • With the variable ATT you can set gain of the preamp as you need
  • Range is 0 to 17 dB

k9ay/4-way antenna switch controller preamplifier gain qro.cz hamparts.shop

preamplifier bias

  • With this trimmer you can set right bias for the transistor
  • Bias vs IP3 and gain parameters - more info on my BLOG
  • Recommended bias is 45 to 70 mA for 13 V+

k9ay/4-way antenna switch controller preamplifier bias qro.cz hamparts.shop

BPF bypass

  • You can use one of three BPF (160, 80 or 40m) or you can ByPass it for wideband operation
  • Controller by switch on the front panel - number 4 on controller

k9ay/4-way antenna switch controller bpf bypass qro.cz hamparts.shop

BPF 160m

  • 160m BPF selected by controller
  • Switch on the front panel - number 4 on controller

k9ay/4-way antenna switch controller bpf 160m qro.cz hamparts.shop

BPF 80m

  • 80m BPF selected by controller
  • NOTCH filters are included, nulls 160 and 40m
  • Switch on the front panel - number 4 on controller

k9ay/4-way antenna switch controller bpf 80m qro.cz hamparts.shop

BPF 40m

  • 40m BPF selected by controller
  • NOTCH filter is included, nulls 80m
  • Switch on the front panel - number 4 on controller

k9ay/4-way antenna switch controller bpf 40m qro.cz hamparts.shop

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