Mel Jones Posted October 18, 2019 Share Posted October 18, 2019 I have a 35mHz Futaba T7CP transmitter and a number of receivers and crystals, which I no longer use. I would like to give them to a school or college as the kit is in good condition it seems a pity to bin it. Does anyone know of a likely place that could use this kit? Quote Link to comment Share on other sites More sharing options...
kevin b Posted October 18, 2019 Share Posted October 18, 2019 A lot of us are keeping our 35mhz kit. Just i case ! Quote Link to comment Share on other sites More sharing options...
Former Member Posted October 18, 2019 Share Posted October 18, 2019 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
Dave Cunnington Posted October 18, 2019 Share Posted October 18, 2019 Hi Mel, as Doc M above, I too use all 35meg stuff Should you be interested , please pm me with details of a suitable exchange rate in coin of the realm Rgds DC Quote Link to comment Share on other sites More sharing options...
Former Member Posted October 18, 2019 Share Posted October 18, 2019 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
Malcolm Fisher Posted October 18, 2019 Share Posted October 18, 2019 I can't see why a school or college wouldn't want to use 35MHz equipment. After all it is the ONLY frequency dedicated to model aircraft. I still use some as well as some even older 27 MHz gear with no problems even though I do have some 2.4 Gig radios - also, to date, with no problems. Malcolm Quote Link to comment Share on other sites More sharing options...
Phil Green Posted October 20, 2019 Share Posted October 20, 2019 Personally I think everyone ought to keep at least one 35mhz set, use it or lose it! Quote Link to comment Share on other sites More sharing options...
Wingman Posted October 20, 2019 Share Posted October 20, 2019 Ah yes I can see it now - latest government ammendment to Drone regulations 3.2.3.1.2.3.12.23 para 3.2 sub para b (1) "Model aircraft controlled exclusively using frequencies in the 35Mhz dedicated model flying band will be exempt from all regulations herein" Quote Link to comment Share on other sites More sharing options...
Mowerman Posted October 20, 2019 Share Posted October 20, 2019 Yes keep some 35Mhz and use it occasionally like I did then forget to extend the Tx aerial, oops, crunch, never mind it was an old 'hangar queen'. Quote Link to comment Share on other sites More sharing options...
Don Fry Posted October 20, 2019 Share Posted October 20, 2019 We've all dun it. edit, right handed culprits turn anti-clockwise in frustration. Cack handers, opposite. You look next time. Edited By Don Fry on 20/10/2019 17:37:07 Edited By Don Fry on 20/10/2019 17:37:57 Quote Link to comment Share on other sites More sharing options...
Peter Miller Posted October 20, 2019 Share Posted October 20, 2019 I still have my beloved FF8 and a stack of recievers. Quote Link to comment Share on other sites More sharing options...
Martin McIntosh Posted October 20, 2019 Share Posted October 20, 2019 I gave away my almost new and expensive 35mHz Rx`s for use by some youngsters because 2.4 came about just after I bought them, but have kept the JR 3810 tranny since I can use a 2.4 module in it. Beware though, the lithium back up battery has a limited life and is very difficult, if not impossible, to replace. I tried this on a 388. When it dies you lose all memories and the Tx is effectively dead. Quote Link to comment Share on other sites More sharing options...
Former Member Posted October 20, 2019 Share Posted October 20, 2019 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
Peter Christy Posted October 20, 2019 Share Posted October 20, 2019 Posted by Martin McIntosh on 20/10/2019 20:41:34: Beware though, the lithium back up battery has a limited life and is very difficult, if not impossible, to replace. I tried this on a 388. When it dies you lose all memories and the Tx is effectively dead. They're not that difficult to replace. I've just done a 347 for a lad and fitted a 2.4GHz module in it - working fine now. Sourcing batteries with the solder tags welded on is tricky, but I just soldered some short solid wire leads straight to a standard battery. OK, it lost all its memories, and I did a recalibration of the sticks as a precaution, but its really not that difficult. It just needs a bit of care and patience. Plenty of guides out there on t'internet! -- Pete Quote Link to comment Share on other sites More sharing options...
Martin McIntosh Posted October 21, 2019 Share Posted October 21, 2019 Can`t speak for the 347, but the 388 has two rows of spring loaded buttons which are a nightmare to refit, also the cell is sandwiched between double decker pcb`s. Tried an ordinary cell wired in parallel but of course it soon discharged. Quote Link to comment Share on other sites More sharing options...
Geoff S Posted October 21, 2019 Share Posted October 21, 2019 I've still got my 35Mhz Multiplex 3030 transmitter and a few Multiplex/other IPD/DSP receivers. No point selling it as it would fetch very little. I made a Frsky 2.4 gHz DiY module for it so it's even a possible standby if needed. Geoff Quote Link to comment Share on other sites More sharing options...
Peter Christy Posted October 21, 2019 Share Posted October 21, 2019 Martin: the 347 is pretty much the same. The trick is to use masking tape or similar, to hold the buttons in place whilst dismantling and replacing. The PCB is removable, with care - certainly on the 347. (I believe the 388 is similar.) You can then unsolder the old battery and replace it. If you parallel them up, it will simply discharge the new battery, as you discovered. Depending on how long the battery has been flat, you may have to do a "system reset". Again, instructions are out there: **LINK** Not something I want to be doing every 5 minutes, but perfectly do-able. And there's always Mike Ridley! -- Pete Quote Link to comment Share on other sites More sharing options...
GONZO Posted October 21, 2019 Share Posted October 21, 2019 I confess this is an area I am totally ignorant in. How long do these internal batteries last? I've got a Futaba FF8 that's over 25 years old and no problems yet. A FF9 that's' just under 20 years old and two FF9 super that are almost as old, all with no problems. They've always had a main battery installed and kept charged. You say the internal batteries are 'lithium' (rechargeable type?), do they get charged by the main battery(possibly when the Tx is switched on) and the reason people have had to replace them is because the Tx has been left for some time without the main battery installed/Tx switched on? Quote Link to comment Share on other sites More sharing options...
GONZO Posted October 21, 2019 Share Posted October 21, 2019 A bit of searching reveals that there is no memory battery in my Futaba Tx. Quote Link to comment Share on other sites More sharing options...
Martin McIntosh Posted October 21, 2019 Share Posted October 21, 2019 Thanks Peter. I think that the 347 must be quite different, just look at that reset procedure. I used to do intricate pcb repairs for a living but on examining the 388 decided that removing all those interboard wire links was not on. Anyway, I had sold it to a mate who probably never switched it on since he just likes having old radios. I too used tape on the buttons but those springs were a devil. Quote Link to comment Share on other sites More sharing options...
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