HAM Radio 3.2/Ham Radio Version 3.2 (Chestnut CD-ROMs)(1993).ISO/kenwood/ken_mods/ts440s.19

Text File | 1990-09-01 | 2KB | 35 lines

TS440S.19

   The Baud rate may be changed to 1200 Baud by removing jumper W50 and
installing a jumper from the left pad to the center pad as viewed from
the front of the radio.  This will become obvious once you have the
radio opened up.  Many other Baud rates are possible, just look at the
schematic.

     As long as you are in the radio, lift D-60 to enable the 10 Hz.
display.  The main tuning knob is varing this digit, so you might as
well see it.  It also helps when using RIT/XIT as the RIT/XIT display
does not resolve the 0.01 KHz. digit.  This  Modification is in the
Radio's Book.

     Not in the book is the fact that if you lift D-80 and do an MPU
reset, you will be able to transmit on any frequency between 1.5 and
30.0 MHz.  This means you will be able to  work the Mars nets, Etc.  Do
not transmit out of band.  It is illegal even if it is accidental.

     Some computers use TTL levels on their serial ports.  If so, here
is a time when you will not have to convert it to RS-232.

  The IF-232 Interface from Kenwood is a 1488 and a 1489 chip in a box.
These are an RS-232 Quad Line Driver and Receiver and are available at
Radio Shack for $1.29 Each.  Here is an easy project that will save you
a lot over the $69+ Kenwood price  of the IF-232 Interface.  The 1488
needs a + and - supply. Unregulated + and - 12vdc is just fine. Get the
+5 vdc for the 1489 by putting a 7805 regulator on the +12 vdc supply.
100 ma. is about the max you'll draw, so the smallest transformer you
can find will still be plenty large.  Don't forget to series up two of
each gate to cancel the inversion that the 1480's produce.

CONTINUED IN FILES TS440S.11, TS440S.12, TS440S.13 - REQUEST THEM FROM
SERVER