TS440S.7 Subject: BUILD OWN KENWOOD COMPUTER INTERFACE COMPLIMENTS OF WA2SNA BBS IN NYC,USA -------------------------------------------------------------------------------- Mark C. DiVecchio 10435 Mountain Glen Terrace, San Diego, CA 92131 K3FWT Home of PC-VT and LPTx 619-549-4056 sdcsvax!man!wolf!markd Bulletin Board 619-549-3927 -------------------------------------------------------------------------------- Kenwood Computer Interface Instructions _______________________________________ These Instructions are TS-440 specific, but the basics also apply to the TS-940, TS-811 and TS-711. It is possible to save yourself a few dollars and lose nothing in quality by buying the parts to upgrade your Kenwood radio for computer control. Just purchase the parts were you find them and install them using the instructions in the Radio's Manual. IC 54 is a uPD-8251-AC Serial Communications Interface. Commonly called an 8251A ($1.89 Mail Order) IC 55 is a TC-4040-BP 12 Stage CMOS Divider. Commonly called a 4040 ($0.69 Mail Order) The IC-10 Interface Kit from Kenwood Contains ONLY these two parts and less instructions than are in this file. The only thing you are going to miss, is the $22+ price tag on the IC-10 Kit. Signals are TTL levels (NOT RS-232) Baud rate is 4800 (1200 Opt.) Format is ASCII Serial; 1 Start, 8 Data, 2 Stops CONTINUED IN FILE TS440S.19