[aprssig] D-710 / D-700 Flash

Mark Cheavens mcheavens at usa.net
Tue Aug 7 13:41:42 CDT 2007

Kenwood is in a real bind because of the cellular block issue. In 
order to do an "open source" type user interface they would have to 
put the VCO control into a different flash mask to prevent anyone 
from altering the RX capabilities. This would of course increase the 
development and production costs.

If a group were to form and try to reverse engineer (or start from 
scratch) the code, I would HOPE that group would not mention or 
tackle the 800Mhz issue. If the Cell phone issue were not imposed 
upon the radio industry it would make the possibility of software 
defined radio's MUCH easier!

If said group were developed Kenwood MIGHT likely have to move to the 
masked CPU. That would preclude newer production (after the change) 
from being re-flashed which would not only increase future service 
costs, but also increase current prices (since warranty service costs 
are figured into the new price).

I am working on a GE Phoenix/Delta project where we take the original 
eeprom and CPU out of the radio and have written our own software 
(with a 9S12 CPU). We can do a LOT with it. All it takes is development time!

At 12:41 PM 8/7/2007, you wrote:
>Then they're welcome to take it on.  I'm not particularly inclined 
>to put a lot of work into making Kenwood's product better when 
>they've not only not provided any help but have attested that 
>they've done their best to prevent modification.
>Now, if a radio manufacturer was to come to the APRS community and 
>offer a D700/710 type radio that'd be developed as an open source 
>project from the start, that'd be different.
>I just wish Ten-Tec was in the VHF/UHF market.  They're the only 
>ones I've ever had any real response from.
>Curt, WE7U wrote:
>>On Tue, 7 Aug 2007, Scott Miller wrote:
>>>Not that I'd want to tackle reverse-engineering the D710...
>>Yea, but what if there were a team of 20 or more involved?
>>It'd certainly be a major project though, starting with bare
>>hardware and writing all the code from scratch, assuming enough
>>could be learned about the hardware to do so.
>>Curt, WE7U: <www.eskimo.com/~archer/>     XASTIR: <www.xastir.org>
>>   "Lotto:  A tax on people who are bad at math." -- unknown
>>"Windows:  Microsoft's tax on computer illiterates." -- WE7U
>>The world DOES revolve around me:  I picked the coordinate system!
>>aprssig mailing list
>>aprssig at lists.tapr.org
>aprssig mailing list
>aprssig at lists.tapr.org

More information about the aprssig mailing list