Modifying an Futaba Attack radio.

I just dove into the dark recesses of my storage shed and two days later when I found my way back out again, I had in my hand the two channel Futaba Attack radio that I bought four years ago.

Problem: the radio doesn’t have ATV or end-point adjustments. Before I toss the radio and buy one with ATV. Can I simply modify this radio to have ATV?

Or do I remember a link that explained how to install end point adjustments on a Hitec Sail servo?

I eventually found some notes on how to modify the Attack and the Hitec servo then decided that I was better off to buy a 75 mhz module for my Futaba 9C. I now have way too many channels for my sailboat…nah…You can’t have too many channels. I’ll use the Attack for my Footy that I will be building.



Did you find some info on adjusting the end points on the Hitech servos if so are you able to post it or set up a link to where you found it as this would be useful.

Cheers Gappy

how do you modify the hitec? url or post whould do nicely thanks

Never hold your farts in.
They travel up your spine, into your brain,
and that’s where sh*+y ideas come from.

I found notes toward modifying a Futaba servo with two micro 10k trimpots in the “1USM construction manual” PDF found on the AMYA website ( I believe the same method would also work on the Attack Radio as well as the Hitec servo.