[aprssig] Multi control station situational awareness - (kenwoods)

Robert Bruninga bruninga at usna.edu
Wed Dec 4 13:35:01 EST 2019

Going from memory (always dangerous), I think the D700 used FLAT audio
tones – no preemphasis, no-demphasis for best discriminator performance.

But most home built systems just connect to Speaker audio (deemphasized)
and Mic input (emphasized) which changes tone balance by + and – 6dB
compared to flat audio.

The D710, I think compromised from flat audio a bit to maybe include 3 dB
of tone skew to improve performajnce with slapped together TNC radio combos…


*From:* aprssig <aprssig-bounces at lists.tapr.org> *On Behalf Of *Stephen H.
Smith via aprssig
*Sent:* Wednesday, December 4, 2019 11:36 AM
*To:* Keith VE7GDH <ve7gdh at rac.ca>; TAPR APRS Mailing List <
aprssig at lists.tapr.org>
*Subject:* Re: [aprssig] Multi control station situational awareness -

On 12/4/2019 10:36 AM, Keith VE7GDH wrote:

Bob WB4APR wrote…

By the way, the D700 TNC is a REALLY mediocre-performing device as well.

How does the D710 compare to the D700? Does it do any better at decoding
than the older model?


73 Keith VE7GDH

I simply don't know.  I've never had a D710 or played with one.

I continue to use my D700 because it makes a much tidier installation in my
car than the '710 would.   All the connections are to the main radio
chassis under the seat; not to the head.  On the D710, everything sprouts
out of the control head (mic, ext GPS, ext serial data, etc) that makes for
a much messier install.   Not to mention those stupid Macintosh 8-pin
mini-DIN serial cables.    [Why is it that Kenwood doesn't seem to be able
to accept the otherwise nearly universal convention for serial connectors
that DCE devices should be a female DB-9 socket,  so a standard
male-to-female DB-9 "extension cable" can connect the radio to a normal PC
serial port -- i.e. without gender changers or null modems?]

Further the '710 head is wider and won't fit into the console space in my
Jetta TDI where my 700 is located, especially with all those cables
sticking out.


Stephen H. Smith    wa8lmf (at) aol.com
Skype:        WA8LMF
EchoLink:  Node #  14400  [Think bottom of the 2-meter band]
Home Page:          http://wa8lmf.net

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