How to Modify Yaesu FT857D (TX Frequency Expansion) Mars Mod (Euro Model/Maybe USA Model too)

I suspect the USA model will give the same result
if you end up with the same combo of open/closed.
I didn't lose automatic repeater offset values on VHF.
Like I mentioned in the video,
It does not unlock the Aircraft Band nor MF below the 160 metre amateur band (Which is a Good Thing)
it may well be illegal or improper to do this Mod in your part of the World.
I have shared this for informative purposes only
& I strongly urge all amateurs & none amateurs alike
to abide by thier local regulations/laws/acts/conditions etc.
I do feel that it may be useful for some operators in jurisdictions that allow this for certain purposes.
It may be advantageous for anyone in a life threatening emergency if they cannot get a mayday call out on whatever bands they are generally allowed to operate on or for any operator that hears a mayday call that isn't being attended to that is outside of thier allowed bands.
Very good magnification is helpful when doing this Job
as it is all very small
& be very careful not to spill too much from the conductive pen. (Clean up any overspill)
It is also important to allow sufficient drying time
for the conductive ink to get low enough in resistance.
You may choose to periodically test the resistance with an Ohmmeter before performing the reset ⚡🙏⚡
73 ⚡🙏⚡

[@crazyham]

It doesn't Unlock TX on the Aircraft Band or the MF Bands below the 160 metre amateur band !
The resistors that were already there
were Zero Ohm Resistors
which are the same as a Simple Bridge of Solder or Conductive Ink.
The Euro model only needed one Zero Ohm resistor to be removed.
I suggest trying to get the resistance as low as possible to be on the safe side.
Give the conductive Ink/conductive paint enough time to dry properly
& if the resistance reads a little high,
touch up again after drying with more ink/paint as
More layers are just like having more resistors in parallel
which reduces resistance. 🙏

[@arconeagain]

Yes, most interesting. 73 from 535.

[@crazyham]

Thanks My Friend,
73 de VK3VKe ⚡🙏⚡

[@FarmCottageBnB]

Hi what about 8m / 40Mhz does it rx/tx there with good power pls?

[@crazyham]

Hi there, I just ran a quick test for you.
Although it will TX on 40 MHz the output is attenuated due to the internal filters
dropping 25 watt down to approx 17 watt.
I'm curious what 40 MHz is used for in your part of the world?
73 Mate ⚡🙏⚡

[@ThirteenTeam]

Hi, your telegram account is long inactive marked as deleted, i was worrying.

[@crazyham]

Thanks my Friend.
I expected it would have auto deleted by now.(Settings to Auto Delete after a certain inactive period)
I had to let it go
as I no longer had the telephone number associated with the account.
I hope life is treating You well Mate 👌
Cheerz & 73 from Crazy Ham ⚡🙏⚡