Gang, this is from our buds at Futaba USA. Skylar is our Team Manager and one heck of a good guy.. anyway.
Also.. if I can help in anyway I am happy to do so.. please ask!
From Skylar,
Hey Grim,
Customers CAN purchase the 400MM antennas,
The next question you asked is tricky. (warranty)
They only void the warranty on the RX if they break something during install, U.FL is small and can be considered fragile compared to other things we are used to in the hobby, in most cases that will void the warranty. We can still cover parts of the receiver like the plastic if it had a bad mold or the label starts to wear due to other components but if a customer installs the 400MM antenna and range is affected negatively it would be done on a case-by-case basis.
The safe answer is any function that is not directly affected by a changed part would not void the warranty if that makes sense. We try to handle it closely to the Magnuson–Moss warranty standard so it gets tricky, for example changing the wheel foam on your TX shouldn’t void the warranty of the display on that TX if it somehow formed a line.
Part numbers are subject to change at any given time but this is the current part number (9M08A17301)
Best way to buy it is make a ticket at
www.futabausa.com/repairs and request the quantity of the 400mm antenna you want. Going price is around $7 per.
We can install them for around $17 + shipping as an option.
Time always varies but we are under 2 weeks Currently, best way to get turn around time is to ask the repair tech once the ticket is submitted.
All of our techs have been trained in installing and checking/testing antenna replacement/repairs/installations so anyone can have the confidence needed in sending it in.
Best Regards,
Skylar McDaniel