Model Boat Mayhem

Technical, Techniques, Hints, and Tips => Radio Equipment => Topic started by: Navy2000 on February 26, 2023, 11:19:40 pm

Title: Robbe Twin stick
Post by: Navy2000 on February 26, 2023, 11:19:40 pm
I have a few of the twin stick throttle control units that Robbe sold at one time that were installed into the F-14 radios. My question is has anyone ever installed these into other radios other than the F-14 or F-16 radios. I was hoping that they can be installed into some of the Futaba radios. Any help would be great.


Thanks
Duane
Title: Re: Robbe Twin stick
Post by: unbuiltnautilus on February 27, 2023, 08:41:46 am
I cannot see any reason why you could not use these in most radios. As long as the pots are 5K on your other sets. The only oddball I ever came across was one of the early Saturn radios, which had 50K pots, a bit weird.
As long as you can physically get the sticks installed, all you would need to do is hook up the centre wire from the od pot to the new pot, and the other, outer wires to either outer wire on the new pot. Sounds easy, but may be best to practice on a cheap, old two channel set first, just to get the feel for what is involved.
Title: Re: Robbe Twin stick
Post by: KitS on February 27, 2023, 10:38:49 am
Weren't the F-14s actually made by Futaba? Something's ringing bells about that, but I can't grab hold of it.


Perhaps Futaba built their own version of the F-14 Navy?
Title: Re: Robbe Twin stick
Post by: TomHugill on February 27, 2023, 11:14:49 am
Twinstick works on the fc 16 absolutely, I'm not sure about my fc28 however
Title: Re: Robbe Twin stick
Post by: HMS Invisible on February 27, 2023, 05:14:52 pm
I have a few of the twin stick throttle control units that Robbe sold at one time that were installed into the F-14 radios. My question is has anyone ever installed these into other radios other than the F-14 or F-16 radios. I was hoping that they can be installed into some of the Futaba radios. Any help would be great.


Thanks
Duane
Tools you need are:-
* A digital voltmeter with a resistance range
* star<>delta resistance conversion formulae (https://www.google.com/search?q=star+delta+resistance+calculation&source=lnms)
* pencil and paper to draw all resistances from each channel to power rails.

They will help if you replace pots of different resistance, radios that used separate pots for trim and pots wired as variable resistors.
If you go back to radios before integrated circuits it is still possible but you won't get precise timing.
If you encounter an NE5044 channel encoder chip, then I recommend you look at the data sheet.
Take a photo, reduce below 1Mb if you get stuck and have to whistle on this Mayhem thread.