IC-9100: Hardware modification that adds RX out – RX in connectors
Contents
1. IC 9100 Hardware modification that adds RX out RX in connectors Note Before you do anything please read this Warning If you have any doubts do not perform the modification or let someone with the technical knowledge do this If you try the modification on your own equipment it s on your own risk of damaging parts and loosing warranty My IC9100 is older than two years and have no warranty or whatsoever anymore The IC 9100 transceiver lacks of the RX out RX in feature which can be found in some middle class and high end transceivers The advantages of this feature are Connect separate receiving antennas like beverages and flags etc Using bandpass filters and preselectors etc Insert a3 dB splitter or other splitters to get a part of the receiving signal for SDR receivers panadapters spectrum analyzers or other receivers The modification is quite simple and is just using the HRX signal which is passed over the W133 cable between the CTRL UNIT jumper J2101 and the BPF board jumper J141 See Figure 1 BPF CTRL UNIT Figure 1 WIRING DIAGRAM showing HRX signal Page 125 and 126 of the service manual The HRX signal is only for the Band HF 6m The W133 cable is replaced with two coaxial cables which goes to the rear panel Figure 2 used BNC connectors for the RX out and RX in signals and a BNC jumper cable to connect both Figure 3 The radio internal connectors are those special TMP connectors w2. hich ICOM uses for years 7 August 2014 Hardware modification to add RX out RX in connectors by dc1rjj 1 7 August 2014 a ETETEN 1772 n a ee ek T EE EES saamaate E Jw i rag ioi t aan eas TE Figure 2 Internal view with the two newly installed coaxial cables Hardware modification to add RX out RX in connectors by dc1rjj Figure 3 RX out RX in with the BNC jumper cable Beware The HRX signal is behind the protection circuit at the CTRL UNIT The protection circuit can be seen on page 155 of the service manual and consist of the parts MA3J7420GL RL621 and many other parts If you do this modification ensure you can protect the RX in port with your own circuit to avoid a deaf receiver As said before the HRX signal is only for the Band HF 6m If you want e g a separate SDR receiver for VHF or UHF use the internal VRX or URX signals between PA B UNIT and RF B UNIT instead of the HRX signal Figure 4 PA B UNIT 0MM 120 110 ajno jna n 897002 8970025130 1 5D 300MM 897002 1 50 3 W2 8900019440 OPC 2077 P1N16L60 RF B UNIT Figure 4 WIRING DIAGRAM showing VRX and URX signal Page 126 hope you enjoy your IC 9100 with this additional feature vy73 de Hans dcirjj 7 August 2014 Hardware modification to add RX out RX in connectors by dc1rjj
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