Hi,
I did the TCXO-9 mod on my FT847 but a little differently (and easier) as to what's already on the internet.
It is performing fine and I did not find any unwanted side effects.
If you're interested, drop me a mail and I will send it to you.
bruno.beckers@...I wanted to upload it to the files menu but that seems to be impossible.
73,
Bruno