[Yaesu] Unlock Tx FT857D

[Dr. Gerald N. Johnson]

At mods.dk look for FT857 mods for extended transmit or MARS. In the 
threads there is one about marine but it doesn't say much and you can 
only read one per day for free. One thread title suggests its possible 
to do by the CAT cable and software.

The extended discussion at:
www.worldwidedx.com/threads/yaesu-ft-857d-ft-897d-857-897-frequency-modification-expansion.28511/
shows its a bit problematic and that its important to hold certain
buttons in the reset process after doing jumper mods. The mod seems to 
depend
on the year of manufacture as well as the area for which it was shipped,
especially US vs EU.

Google "VHF transmit expansion FT857" (without the quotes) for a large 
number of discussions and suggestions.

In the US such a use would be illegal except for emergency conditions 
because the radio hasn't been certified for operation under the marine 
rules. Its only been type approved for use in the ham bands. I've 
noticed receive sensitivity drops off on VHF out of the ham bands also. 
My 857s haven't been modified for frequency coverage but one might get 
it done some day for greater versatility when used for a microwave IF.

73, Jerry, K0CQ


On 10/19/2014 10:40 AM, David VE3VID wrote:
> Hello everyone
>
>
>
> Is it possible to unlock the FT-857D to transmit outside ham VHF frequencies?
>
>
>
> During summer months I would like to use my 857 on my boat.  Marine VHF segments are just up from the 2m ham band at 155-160s mhz.
>
>
>
> Any ideas?
>
>
>
> cheers&  73
>
> David
>
>
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