Help resurrecting Blackfoot QD

[Ed_209 0]

 

Hi all - new to forum

Trying to resurrect my QD Blackfoot (was a gift from probably around 1994ish though could have been earlier).

Bits missing / issues, and what I’ve done:

- Controller : got another on eBay (had to replace snapped m3 aerial - but only got a 25cm flexible one as can’t find telescopic that’s the required 4.2mm - am aware this affects range)

- tx/rx crystals : got more on eBay (set of AM 26.995 and 27.255 in case needed to test separately)

- battery cover on truck gone : done nothing so far - just taped them in for now

- aerial on truck bent - not done anything with that - looks ok..

- wires to battery unit on truck broken off : re-soldered 

- battery compartment connections corroded - baking powder sol / vinegar to clear

- not sure if compatible?, but put 8x 1.5V rechargeable Li-ions in the battery compartment (I won’t try charging via mains fyi - I’d take them out every time / put them in their own charger)

 

Initial testing:

Turned on controller, switched on truck…

…jolted a couple of times (with no input from controller at all). When Truck held in different positions and turned off/on it’ll essentially try to drive off on its own (at a very healthy speed from the motor in both low and high settings)…

- I understand this might be the speed controller ‘locked’ into max position? but having taken it apart a little I can’t see that this is manual speed control so assume electronic control…

- not sure if controller / crystals also have something to do with it - no broken connections as far as I can see…

- perhaps could all be to do with partial corrosion in batt compartment?

not sure how to fix / what else I should be trying (without overhauling/modernising the system)?

Any recommendations / suggestions most welcome thank you!!

 

[Mouc-RC 529]

Hello, also welcome,

Are you sure you have the right transmitter? You should have the one with the red led on when power is on, and only the steering trim, just like here:

https://tamiyabase.com/tamiya-models-7/46012-46012

I'm not sure the latter transmitters with steering and throttle trim can work with the BlackFoot (which is essentially a ClodBuster QD, except for chrome details/chassis colors).

Still you can go on disassembling/cleaning/reassembling everything in depth, this can't be bad.

[Ed_209 0]

Thanks Mouc-RC. Yep defo got the right one, just arrived with a duff aerial is all. 

[Mouc-RC 529]

Hmmm, would have been too easy

Maybe you can check & clean contacts/potentiometers in the transmitter also. There's a few threads in the forum about QDs circuit boards, if you've got some knowledge in electronic (personally I don't get it at all), maybe it could help you.

Another option would be to find a working "donor" and you could mix all the good parts you'd get to make your BlackFoot work