I didnt explain it very well.
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In order of appearance from the antenna:
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1. 144.610 rx? ? ? ? ? ? ? ? ? ? ?c2037
2. highband vhf rx? ? ? ? ? ? c2037
3. 145.210 tx? ? ? ? ? ? ? ? ? ? ?c2037
4. highband vhf tx? ? ? ? ? ? c2037
5. proposed 144.39 rx/tx? c2037
6. highband vhf duplexer Q2330E
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"The notch depth should be reduced to narrow the width of the notch. If I remember correctly, the notch should be adjusted to 15dB. "
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If I read your suggestion correctly, It could help to reduce the width of the 144.610 notch via adjustment of the coupling loop?? It should all become clearer when I finish cabling the spare cans to emulate the 144.610 in the next few days.? fwiw, the rptr radios are TKR/NXR, aprs will be cdm-1250
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