[aprssig] Alinco or ???
droobie at maine.rr.com
Wed Nov 9 20:25:43 CST 2005
At 09:12 PM 11/9/2005, scott at opentrac.org wrote:
>I'd been almost certain that was the case, but someone told me the D700 was
>all one board. Hmmm... very interesting. Flat ribbon is much easier to
>deal with for production - for most common pitch and conductor count
>configurations I can get off-the-shelf parts.
I thought so too, but I took photos a while back to point out the
In-circuit flashing port on the D700 board back in the debacle about
easy upgrades for the D700. As we found out, Kenwood could offer
upgrades and use a simple cable that they already have to reprogram
the D700. Whether this applies to ALL D700s I'm not sure, but
applies to mine for sure.
The TNC is hidden under a metal shroud toward the front of the unit
underneath the front nose piece, if I remember correctly.
>Too bad you can't replace the APRS brains of the D700. Though I guess you
>could do a certain amount of translation to support new message types.
If you know someone that has a took to read/write that chip, then the
brown plug up above it has all the pins you need to in-circuit flash
the chip.. This isn't a run-of-the-mill AVR though, it needs some
pretty costly tools. Kenwood also uses a similar NEC microcontroller
in their SR901 Sirius Satellite Receiver. I'm not sure if they do in
their SR902 or above, but it seems like Kenwood really likes NEC
microcontrollers based on these two instances.
The NEC they used in this case has multiple serial channels. If I
recall the head itself is serial based too, It actually has a ATMEL
microcontroller in it. I'd have to open it back up to confirm
though. There's probably some room to mess with and intercept the
Kenwood head if someone wanted to take a stab at it.. :)
>It's still a very expensive rig, though. The DR-135T has the advantage of
>being at the low end of the price range for 2 meter mobiles. Sure, it
>doesn't have all the bells and whistles... I just see that as the place
>where I can add the most value.
The DR135TP set me back like 239$ from AES if I recall. The big
money was in the 330MV power supply I bought for it. I bought it
solely for APRS though to provide the IGate for this area because the
one in the area was running WinAPRS on a very old machine that liked
to crash a lot. I regret it purely because that coupled with my
ARX-2B Cushcraft out back (which has been weatherbeaten pretty bad)
made for a very good voice and APRS/PCSAT rig. But, the greater good
is the Igate here and a weather station once I get a tower up. I've
had the tower for 3 years, just haven't had time to get the ground
work finished and a concrete truck rolling.
>Maybe I'll finally pick up a D700 to play with when I get my ARM TNC
The D700 is a neat radio. It has some kludges but it does do its job
very well for what it is. It was my first rig and a very generous
gift from my grandfather when I passed my test.
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