TS-850S region change

[Joe McElvenney]

Hi,

As I would like to take advantage of the recent increase in
the 40m allocation here in the UK, I wonder if anyone has made
any sense of the diode table (D8 - D12) on the TS-850S digital
board schematic. This as far as I can see determines the
destination region and thus the rig's operating band limits.

I know that it is possible to change the existing arrangement
to give general coverage to the transmitter but would rather not
do that. Initially I did a hex dump of the ROM but found it too
big a task to decode without experience with the particular
processor code - a uPD78C10.


73 de Joe, G3LLV

[gb]

"Joe McElvenney" > wrote in message
...
> Hi,
>
> As I would like to take advantage of the recent increase in
> the 40m allocation here in the UK, I wonder if anyone has made
> any sense of the diode table (D8 - D12) on the TS-850S digital
> board schematic. This as far as I can see determines the
> destination region and thus the rig's operating band limits.
>
> I know that it is possible to change the existing arrangement
> to give general coverage to the transmitter but would rather not
> do that. Initially I did a hex dump of the ROM but found it too
> big a task to decode without experience with the particular
> processor code - a uPD78C10.
>
>
> 73 de Joe, G3LLV
>

Ofcom and the RSGB have announced that all UK radio amateurs are now allowed
access to the extended 40-metre band.
For further information on specific updates and conversions of Kenwood
amateur radios -
PLEASE e-mail

Authorized Amateur Radio Dealers in UK
http://www.kenwood-electronics.co.uk/company/Menu3distributors.aspx?men=1&M2=17&M3=2

Spare parts, accessories and manuals for communications equipment
can be obtained from the following companies in the UK.

Acoustic Services LTD
142 Uxbridge Road
Hanwell
London
W7 3SL
Tel no: 0208 579 2872
Opening hours: Monday to Friday 9.00 to 5.30

Fullers LTD
Riverside View
Wickham Market
Ipswich
IP13 0TA
Tel no: 01728 746500
Fax no: 01728 746900
E-mail:
Opening hours: Monday to Thursday 9.00 to 5.30, Friday 9.30 to 4.30

[gb]

"Joe McElvenney" > wrote in message
...
> Hi,
>
> As I would like to take advantage of the recent increase in
> the 40m allocation here in the UK, I wonder if anyone has made
> any sense of the diode table (D8 - D12) on the TS-850S digital
> board schematic. This as far as I can see determines the
> destination region and thus the rig's operating band limits.
>
> I know that it is possible to change the existing arrangement
> to give general coverage to the transmitter but would rather not
> do that. Initially I did a hex dump of the ROM but found it too
> big a task to decode without experience with the particular
> processor code - a uPD78C10.
>
>
> 73 de Joe, G3LLV
>

Data Sheet for the NEC uPD78C10
http://www.baradine.com/ftp/public/uPD78C10_Summary.pdf

NEC Emulator debugger
http://www.baradine.com/ftp/public/Em7811users.pdf

[Joe McElvenney]

GB,

Thanks for that address and the 78C10 info. Have emailed them
over the modification and await results. If I don't get anywhere,
I'll extend the diode array out to a proto-board and play around
until the sweet-spot shows itself. What I'm looking for really is
the North American setting as they have had the extended 40M
allocation from the start.


Cheers - Joe, G3LLV