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<div class="moz-cite-prefix">On 5/3/2022 2:36 PM, MJ Inabnit wrote:<br>
</div>
<blockquote type="cite"
cite="mid:a55e2a41-dbd3-1c31-46fd-f1fb49ee97ed@arrl.net">
<pre class="moz-quote-pre" wrap="">
Bought a super cool old Kenwood TH-D7 from the 1990's. It works! :)
Playing with data cable. I can do APRS using the command mode, but my
efforts failed by putting it into KISS mode. It would only transmit the
TXDELAY carrier and no data.
Anyone get this rig into KISS to use a computer aprs program?
</pre>
</blockquote>
<p><br>
</p>
<p>The commands to enter KISS mode are similar to many other vintage
TNCs. <br>
</p>
<p>from COMMAND mode prompt:</p>
<p>KISS ON <RET><br>
</p>
<p>RESTART <RET></p>
<p>However, the first gen Kenwood APRS radios were notorious for
buggy, unstable KISS operation. <br>
</p>
<p><br>
</p>
<p>The D7 and D700 were actually originally made for a proprietary
Japanese system that preceded APRS called NaviTra ("Navigation
Transceiver"). About 2/3ds of the way down this page on my
website is some stuff on NaviTra:</p>
<p> <a class="moz-txt-link-rfc2396E" href="http://WA8LMF.net/aprs/index.htm"><http://WA8LMF.net/aprs/index.htm></a><br>
</p>
<p>When NaviTra flopped in the Japanese market, the radio designs
were recycled, with new firmware, for the then newfangled APRS. <br>
</p>
<p><br>
</p>
<p>Both the NaviTra predecessor radios, and the D7 & D700, are
based on a TNC-on-a-chip design designed by Tasco, also a Japanese
company. [Tasco is probably best known for their
fast-scan<-->slow-scan TV scan-converter chip used in the
Kenwood VC-H1 handheld SSTV device & the Model 70 SSTV scan
converter box in the 1980s.] The Tasco TNC chip , which is also
used in the TS-2000 TNC, was crippled by having too little RAM.
It worked fine for short Mic-E compressed position packets, but
longer text strings would randomly overrun the chip's buffers and
lock up the TNC when operated in KISS mode. <br>
</p>
<p>Note also that when the TNC is in KISS mode, the GPS
pass-through feature that would automatically route the NMEA GPS
input data out the main serial port, (saving the need for two
serial ports on the PC) DOESN'T WORK in KISS mode -- only in the
classic COMMAND mode. <br>
</p>
<p><br>
</p>
<p><br>
</p>
<hr width="100%" size="2">Stephen H. Smith wa8lmf (at) aol.com <br>
Skype: WA8LMF<br>
EchoLink: Node # 14400 [Think bottom of the 2-meter band]<br>
Home Page: <a class="moz-txt-link-freetext" href="http://wa8lmf.net">http://wa8lmf.net</a><br>
<br>
-- APRS over FLdigi Modes --<br>
<a class="moz-txt-link-rfc2396E" href="http://wa8lmf.net//FLdigiAPRS/index.htm"><http://wa8lmf.net//FLdigiAPRS/index.htm></a><br>
<br>
60-Meter APRS! HF NVIS APRS Igate Now Operating<br>
<a class="moz-txt-link-rfc2396E" href="http://wa8lmf.ddns.net:14447/"><http://wa8lmf.ddns.net:14447/></a><br>
<br>
Flying Digipeater!<br>
<a class="moz-txt-link-rfc2396E" href="http://WA8LMF.net/FlyingDigi"><http://WA8LMF.net/FlyingDigi></a><br>
<br>
11 Copies of UIview in Action on One Computer! <br>
Live Off-The-Air APRS Activity Maps<br>
<a class="moz-txt-link-rfc2396E" href="http://wa8lmf.net/map"><http://wa8lmf.net/map></a><br>
<br>
<br>
<br>
<p><br>
</p>
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