Software mods for the YAESU FT8000 - version 1.00, 08.04.1998
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With this procedure the upper and lower limits for the VHF and UHF can
be changed. You can expand the RX and TX range without opening your
FT8000. But you need the ADMS 2D programming Software to be able
to download and upload the data to the FT8000.

This mod can be performed on any FT8000, it does not matter what
hardware mod you have or what country configuration you have.

This whole process is 100% reversible, you need only to reset the FT8000
to get your original state back.

The differece to the mods for the FT50 and VX1R is that the ARS will
still have your country band plan, the same as the software mod for the
FT8100.



Every limit has 3 bytes, they are written in the .TPL file, and are
written in HEX code nummbers, so for example 2AB980 is 280.000.0.
You can use the windows calculator to calculate the frequences.

The limits for UHF are at the adress 0630H in the .TPL file, and
the limits for VHF are at adress 0730H.

The limits are in the following order
- rx lower limit (adr+0)
- rx upper limit (adr+3)
- tx lower limit (adr+6)
- tx upper limit (adr+9)


This are the values for a stock USA FT8000

               RX lower limit  RX upper limit   TX lower limit TX upper limit
-----------------------------------------------------------------------------
UHF at adr:0630H     2A B9 80        C6 5D 40         41 9C E0       44 AA 20
                    (2800000)       (13000000)       (4300000)      (4500000)

VHF at adr:0730H     10 C8 E0        2A B9 80         15 F9 00       16 95 40
                    (1100000)       (2800000)        (1440000)      (1480000)
-----------------------------------------------------------------------------

So, now you can easy change the limits for TX or RX according your needs.

So for example if you change the TX limits to be the RX limits.

At adress 0636H change from 419CE044AA20 to 2AB980C65D40 for UHF, and
at adress 0736H change from 15F900169540 to 10C8E02AB980 for VHF.

Edit your .TPL file, make the changes described above, and upload it
to your FT8000.


The FT8000 will now try to TX everywere in the RX range. The possibilitys
have to be explored.

This way you can also change the limits for the RX, the possibilitys have
also to be explored.



I don't own a FT8000, so I can not perform the tests. A friend have sended
the the .TPL files, I have modified them, and he has tested the results.

Unfortunatly he does not own a Frequency counter and a Wattmeter for
UHF so the results can not be accurate tested.
According his scanner the FT8000 is TXing also aprox. 800-1350 ??????????


It would be nice if someone with the right equipment can examine all RX
and TX possibilitys.


A great thank to Barry for sending me the .TPL files and testing
the results.


Greetings, ...