
The Packet Radio “2 N 1” Handbook by Buck Rogers K4ABT
Section 1; Packet Radio “The Basics” Section 2; The X1J4 System Node Operator’s (SNO) Handbook
ILLUSTRATION SECTION Charts & Node Drawings TheNET X1J4 System Node Operators Handbook __ Page 54
This drawing illustrates how the X-1J4 EPROM is installed and connected in the MFJ-1270B TNC. Note that PIN one of
the EPROM is not inserted into the socket at U23. Pin one (1) also has a wire attached to it and is routed to pin 8 of the
MoDem header. This mod also illustrates how the MFJ-1270”B” version is configured with the MFJ-52B DEViation meter
installation.
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