K9AY feeder with BPF

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!Preamp BIAS SET check current and voltage * Connect Volt-meter to GND and jumper JP1. Measure voltage ( PREAMP ON ), it should be more than 11V. ( if you want HIGHer IP3, than it could be 13V / 60mA :) ) * DISconnect jumper JP1 and connect mA meter on the pins ( 200mA scale is fine ). Turn with R4 multi-turn trimmer and set bias to 45 - 65mA. You can have a look at my measurements: [2N5109 OIP3 vs voltage and bias|https://www.google.cz/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0ahUKEwiJmZu08LbVAhVmMZoKHXNvC28QFggpMAA&url=http%3A%2F%2Fok2zaw.blogspot.com%2F2015%2F09%2Frx-ant-switching-b-ox-part-2-preamp-ip3.html&usg=AFQjCNE2JSvcI-vJIUeHtJDbPzHuhThUQA] [https://remoteqth.com/img/ZAW-WIKI/k9ay-bpf/feeder-pcb_5.png|noborder]
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