Lee Damms Posted July 1, 2009 Share Posted July 1, 2009 Hi Guys, Does anyone know what size/rating polyswitch Futaba fit to their transmitters to enable charging via the socket. I've already aproached Ripmax as to can they do the work and the cost but no luck as yet. My 6ex 2.4ghz transmitter is already out of warranty and polyswitches are readily available but before getting out the soldering iron I'd like to know what rating they fit. I think these are fitted as standard on the 9c/9z transmitters. Any advice would be appreciated because I'd like to fit a larger capacity battery and charge it without having to unplug from the circuit board. Any ideas Timbo if you're there. Quote Link to comment Share on other sites More sharing options...
Tim Mackey Posted July 1, 2009 Share Posted July 1, 2009 Hi Lee, yes I am here now, but havent a clue I am afraid - Futaba gear is not my forte. Someone will be along I hope with he answer for you. Quote Link to comment Share on other sites More sharing options...
Myron Beaumont Posted July 1, 2009 Share Posted July 1, 2009 Lee What is a poly switch exactly ? Is it what we used to call double pole two position with three pairs of connectors on the back the middle pair being the common ? If so I would think a 240V One amp job (which is a popular rating -or was years ago) would be more than adequate ie 250 watts max Polyeverything should know but don't get his back up G-umpy Quote Link to comment Share on other sites More sharing options...
Lee Damms Posted July 1, 2009 Author Share Posted July 1, 2009 G-umpy A polyswitch sometimes known as a polyfuse is a self resetting fuse, on my 6ex futaba fit a diode in the charginging circuit as protection but this also stops you useing a charger such as my pro peak prodogy. ie you can't charge or cycle your battery via the charging socket. The mains charger that comes with the set with its 70ma output is no good for a higher capacity battery. I know some people in the states strap out the diode with fuse wire, not an ideal situation. The annoying thing is these are fitted to some of the higher spec Transmitters. I've also fired off an email to Radio South in the states because there was a thread on the net suggesting they do an after fit. if you put polyswitch in ebay they are readily available in the uk, see link http://stores.shop.ebay.co.uk/dannell-4you__W0QQ_sidZ550551596?_nkw=bourns&submit=Search Lee Quote Link to comment Share on other sites More sharing options...
Lee Damms Posted July 8, 2009 Author Share Posted July 8, 2009 Hi Guys Latest update, still no reply from Ripmax after being informed my request would be sent on to the service dept (11/06/2009). After a bit more digging around on the net I found that people were fitting 1.1amp hold 2.2 amp trip polyswitches. Anyway I ordered a pack of ten from ebay, £4.88p type MF-R110 and fitted one today across D1 next to the charging socket after unplugging the battery from the board. I plugged the battery back in but left it outside the transmitter for testing with the back off just in case things did get hot in there. Plugged in my pro peak prodogy charger set it to 300ma (still got original 700ma Nicad in here) to give it a whirl. Perfect no problems, not yet anyway. Note to anyone else who does this, it will invalidate your warranty, do not charge at more than 1amp through the charging socket and personally I'd leave the battery cover off while charging and I certainley don't leave the house while somethings on charge. It will be interesting to see what Ripmax quote for the job if I ever get a reply. Lee Quote Link to comment Share on other sites More sharing options...
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