Modification that enables node gateway operation of the older (pre-1988) MFJ-1270.
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Illustration for the installation of the Deviation meter into the X1J4 node.
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Interface for the Commodore 64 or VIC 20 to the MFJ-1270 TTL comport.
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Interface for the MFJ-1278 and the Yaesu FT-747 HF transceiver.
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Hardware Handshaking illustration for most TNC to PCees
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| Interface two (2) TNCees to one transceiver.
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This drawing defines the signals associated with the RS-232 standard.
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Connect 2 TNCees to 1 Radio; Enables Gatewaying different baudrates on one frequency.
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Interfacing the PacComm PCB 320 to HF ACCY2 port of the Kenwood TS-450S and the VHF Kenwood TM-231 transceivers.
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This drawing illustrates one of the methods used to form a node to node 'gateway.'
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| Similar to previous 'two TNC to one radio,' but includes text on drawing.
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An illustration of a 3 port node/gateway. A 4 port diode matrix may be used with one port left vacant.
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Star Configuration for a node-stack of 5 TheNET, X1J4 nodes.
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Interfacing the KAM or KAM Plus to the FT-747 for HF BBS applications.
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Interfacing the KAM or KAM Plus to the Yaesu FT-757 for BBS, DXCluster, and other HF applications.
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| KENWOOD 7950 to AEA PK-232 MultiMode controller
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Gateway interface for use with NODE/TNCees with de9 comports.
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Alinco DR-110 to TheNET X1J4 node or ROSE switch interfacing.
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Alinco DR-590 (twin-band) to PK-232 Multimode controller.
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Alinco 8 pin MIC ports to nodes with 5 pin DIN radio ports.
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| Alinco 8 pin MIC port to Kantronics KPC-3, KAM, and KPC-2400.
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Early Apple to TNCees with DB25 comports.
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The Radio Shack Color Computer serial port connections.
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Three different types of comports, both serial and TTL.
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This interface cable is the adapter for computers with DE-9 comports and TNC with DB25 comports.
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| Been there, Done that! DE9 gateways.
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The ALINCO DJF1 HandHeld and a TNC2 make a good hilltop node test rig.. or just great Port-A-Packet.
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Building the DRSI DPK-96 (9k6 baud) TNC into an X1J4 TheNET node.
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Interfacing the General-Electric/Ericsson MVP for use as a 1200 baud radio.
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Interface configuration for the 'HAL RVM-100' and the ICOM IC-28 transceiver.
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| Interface for the Heath HK-21 'PocketPacket' and early Yaesu handhelds.
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Interfacing the IC-281 Icom and the AEA PK-96 for 9600 baud operation.
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Interface for the Icom IC-2AT and the Heath HK-21 PocketPacket TNC.
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Interface for the Icom IC-27/27H and nodes with 5 pin DIN radio ports.
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Interface for Icom IC-28/28A and TheNET nodes or ROSE switch with 5 pin DIN radio ports.
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| Interface drawing for the Icom IC-290 and nodes with 5 pin DIN radio ports.
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Interface for HF use of the Icom IC-735 and the MFJ-1278 or MFJ-1274'B' MultoMode controllers.
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Interface drawings for use with 8 pin ICOM and TNCees with 5 pin DIN radio ports.
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WOW, here's a package for you... the ICOM HT's and the AEA PK-232.....!
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ICOM VHF and HF (MIC 8 pin) transceivers and the MFJ-1278 MultiMode controller.
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| Icom IC-228 and the MFJ-1270A, B, and C interface.
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OK, so now you have another J-Pole calculator.
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Remember the 'MAC' with the 5 pin mini-DIN; Here's the interface for your Mac and TNC.
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Now you can have power to that remote mountain top node site... and without a 'hassel' from the utility company.
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A closer look and some details for adding MOV protection to our SOLAR powered node site.
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| The Yaesu RJ-45 MIC port connections for 1200 bauds.
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Turning the (early) MFJ-1270'B' into an X1J4 theNET node.
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Interfacing the Yaesu FT-757 and the MFJ-1278 for HF operation.
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An ounce of prevention beats a pound of cure! Lightning protection for the node site and its personnel.
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MFJ-8621 setup and data port I/O
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WebMaster, Buck Rogers K4ABT 
