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K4HYJ
01-29-2012, 04:14 AM
Has anyone made their own cable to program Kenwood radios that use the KPG-22 type cable? I have seen designs in the past but the only few articles I can find online are very limited.

I in particular have a TH-F6 HT.

KO6WB
01-29-2012, 06:48 AM
This might help http://highfields-arc.co.uk/constructors/other/kpg22.htm.
73
Gary

W9GB
01-29-2012, 03:59 PM
Has anyone made their own cable to program Kenwood radios that use the KPG-22 type cable?

Henry -

The majority (not all) of the PC "programming cables" for radio equipment are TTL Level Converters.
The electronics and uProcessors internally within your radio (or HT) normally operate at 5 V, 3.3 V or 1.8 V levels ...
and have a serial data stream (in some radios this data stream is inverted).

MicroChip - Tips and Tricks (Dealing with lower voltage levels, 3.3V and 1.8V with newest electronics designs)
http://www.newark.com/pdfs/techarticles/microchip/3_3vto5vAnalogTipsnTricksBrchr.pdf

TTL voltage levels are NOT compatible with the standard PC and laptop connections (RS-232 or USB)

SO, a Level Converter (interface or cable) serves multiple purposes:

1. ISOLATES your HT/Radio from your PC or Laptop. This is to protect (ESD) the electronics of both appliances.
2. CONVERT your HT/Radio serial data stream to established PC/Laptop standards (RS-232, USB)
3. REQUIRES DC power (external or from RS-232 or USB ports) for the Active devices (e.g. transistors, ICs) that are used for 1 and 2 above.
4. CORRECT connectors provided to quickly and easily attach to your specific radio (e.g. 3.5 mm TRS jack) and your PC/Laptop (Std. or Mini-USB; DE-9 RS-232)


I have seen designs in the past but the only few articles I can find online are very limited.
SHOP at SPARK-FUN
http://www.sparkfun.com/search/results?term=usb+converter&what=products

Ready Made (Plug-N-Play) cables and DIY Build schematics for Level Converters (RS-232 and USB)
Listing compiled by G4HFQ
http://www.g4hfq.co.uk/links.html

Maxim MAX232 series of ICs is the most popular for RS-232 connections.
http://www.sparkfun.com/products/449

FTDI FT232RQ and Silicon Labs CP2102 USB conversion chips (buy at Spark-Fun, Mouser, DigiKey, Newark, Allied, etc.) are most popular for USB connections.
http://www.sparkfun.com/products/8551

http://www.sparkfun.com/products/8531
==
BTW, this is not rocket science. Middle and high school students build these cables, once they learn to solder!
PIC programmers, Robotics builders and e-hobbyists (appliance and routers using embedded uProcessors)
build and use these TTL Level Converters -- everyday !!
http://picprojects.org.uk/projects/simpleSIO/ssio.htm
==
w9gb

W9GB
02-02-2012, 04:29 PM
Your Kenwood TH-F6 HT presents a TTL serial connection to its internal uProcessor
for connection to radio programers or with converison to RS-232 (or USB) to Personal Comptuers running a programming application (e.g. Windows).

SHORT TUTORIAL
RS-232 versus TTL Serial Communication by SparkFun Electronics
http://www.sparkfun.com/tutorials/215


==
w9gb

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