Using NiMH Rechargeable in Futaba 3GR-2.4GHz?

[gnr racer]

Originally Posted by bodgit

If you have nothing to charge them in then the best and cheapest option would be to buy the set I advised you of earlier in the thread
http://cgi.ebay.co.uk/TX-Pack-9-6v-N...item35a21667ba

I have the older red vapextech cells in my 3gr, have had for the past 18 months & regularly used....excellent!
I should have had shares in Duracell the AA'S i was going through!!

[Qwghlm]

Originally Posted by gnr racer

I have the older red vapextech cells in my 3gr, have had for the past 18 months & regularly used....excellent!
I should have had shares in Duracell the AA'S i was going through!!

Do you charge them with the standard Futaba charger, or with a smart charger?

I've just seen in the 3GR instructions, "The transmitter charging circuit is equipped with an over current protection circuit. If the battery is charged with a quick charger for other than digital proportional R/C sets, it may not be fully charged.

Just wondered if my problem was with using a peak detect charger rather than a Futaba slow one.

Steve

[teamxray]

right i have checked the one i have here the plug is a 2.5 internal size and i have tried to charge it on 7 different chargers and they all charge it with no problems here so i guess it either your charger does not like it or you got a bad connection inside the tx or try swopping the black and red wires around the postive is the inner part of the plug if thats any help see if that works

will not make any difference quick or slow the quick charger will or should be set at 1 amp and no more to charge the tx

[Qwghlm]

Originally Posted by teamxray

right i have checked the one i have here the plug is a 2.5 internal size and i have tried to charge it on 7 different chargers and they all charge it with no problems here so i guess it either your charger does not like it or you got a bad connection inside the tx or try swopping the black and red wires around the postive is the inner part of the plug if thats any help see if that works

Thanks for that, it must be the Tx as I've tried two different chargers, both of which work fine with my Futaba TC9 Super.

Oh well.

Steve

[bodgit]

Have you tried a continuity meter between the charger socket and the plug which the batteries plug into. Maybe a wire broke.

[Qwghlm]

Originally Posted by bodgit

Have you tried a continuity meter between the charger socket and the plug which the batteries plug into. Maybe a wire broke.

I actually just made a plug to short circuit the socket, and with a multimeter across the two pins that the battery plugs into, nothing.

So I looked at the socket, and I've took some photos to post, but I can't now get my camera to download

From what I can see though there is absolutely no connection from the -ve side of the socket to anything!

I'll try to get the photos up.

Steve

[Qwghlm]

Well here goes





Top photo, the centre +ve goes to the two at the back, and you can trace the circuit to the +ve pin. The -ve hasn't got any tracks leading from it.

Bottom photo, again, it doesn't seem to go anywhere!

Steve

[teamxray]

just make a connection from the 2 pin plug to the socket jobs done then

[Qwghlm]

Originally Posted by teamxray

just make a connection from the 2 pin plug to the socket jobs done then

This just gets stranger, checked again with the multimeter and there is a circuit from the -ve pin to the -ve socket even though I can't see one. What there isn't is a circuit from the +ve pin to the centre +ve of the socket, so I've just soldered a wire to form one, and now it charges OK.

Wonder if the diode has blown as there is definitely something called D2 in the +ve circuit.

Steve

[Qwghlm]

Originally Posted by teamxray

<snip>

will not make any difference quick or slow the quick charger will or should be set at 1 amp and no more to charge the tx

I've always charged my TC9 at 1/10, or 2.4 amps, so I should really only charge at 1 amp, probably due to the very small cross section of the internal wiring?

Steve

[Qwghlm]

Just goes to show how confused I can get!

Just tried the charger again and got an open circuit.

Now I've found out that it's nothing to do with the radio, but the intermediate plug between the charger and the Tx, all it needed was not to be fully plugged in, and I mean by fully that means it almost needs to be held together.

No idea why, as I have just checked the plug and it's all OK, but I changed it anyway, and the new one works fine.

So the wire has come out of the radio, and it still works.

Thanks for all your help, and at least I found out the problem, even though I still do not know what is wrong with the plug...

Steve