![]() As said previously I think the battery surge may be the cause. ![]() If not then the circuit is underfused or there is a problem with the charge circuit. After using the transmitter for awhile I may learn to trust it more.Īt any rate it should be possible to quick charge the battery in the Spektrum without blowing the fuse. Perhaps they were faulty when I purchased them. I also had problems with NIMH batteries failing in the past and swore I would never use them again. I also am an old timer and could never trust a battery for flying without peaking it. Of course I know now the charger is only 50 ma. I believe the charge cycles of 10 hours did not do the job. However in this case since the manual said the charger was 110 ma. Anytime I am free to stop at the field I just put the transmetter and receiver on charge for about 15 minutes and I'm flying.Īlso I have proven that using the Sirius really extends the life of the batteries since they never overcharge as with a wall charger, causing loss of battery life. I cannot plan my field trips ahead any more so I have a self containd box with battery, meters and a Sirius charger. Well first I have a couple of reasons to use the Sirius Peak charger. Ordinarily however, if I want to cycle or charge the TX NiMh (or NiCads) at anything higher than 1A, I remove the batteries and charge externally where they are surrounded by air and resting on a heatsink of sorts so the generated heat (esp. Topping up seldom takes longer than 20 minutes. If under pressure of time, usually C5, C/3 or C/2. IME, apart from seldom being flattened to the extent that a 1C full capacity charge is necessitated timewise, I am conservative for all the obvious common sense reasons when charging via the TX charge port. Playing it safe (NiMh overcharge) or supply oversight.I am surprised though that the unit wasn't supplied with a wall wart capable of C/10 output for the TX battery. This is discernible in the DX7 case even at C/2 or C/3. So that said, I don't charge my 1500mAh NiMh at 1C when in the TX because of that and the fact that NiMh cells get notably hotter than NiCads when being fast or rapid charged. ![]() Worthy of mention, Danny has oftimes said here that 1.2A is JR's recommended maximimum charge rate via the TX charge port. This charger does have reverse polarity detection, though TMK it's never been tested on the JR TXs as Cap'n Crosscheck here tends to be kinda' extra careful about that sort of thing. For basis of comparison, I similarly charge my NiCADed X-388S ('97), XF631 ('04), MAX66ADT (XP-662) X3 ('06), Quattro ('05), venerable MAX44 ('96) all without issue via their TX charge ports at rates > C/10 using this charger. The zero peak delta sensitivity can also be adjusted. It charges without issue, and importantly for NiMh, will peak detect (uses zero delta V) and cut-off or fallback to trickle depending upon how the preference is set. The change-over will cost me less than a single idiot or interference driven shootdown.īecause of the 'conservative' charge rate of the set included charger, I regularly charge my DX7 TX NiMh via its charge port using an external charger (SJ Propo PlatinumEX) using a JR orientated polarity charge lead. Other than serving as buddy boxes or retention of my now synthesised module driven venerable X-388S for legacy compatibility purposes when required, I doubt I'll have any other PPM/PCM kit left in my hanger within 18 months time. Although just commencing the transition, adopting DSM2 has been the best move I've EVER made in RC. I have a SPEkTRUM DX7, mode 2, heli, purchased locally from a dealer supplied by the authorised distributor in Australia.įirstly, thanks to Horizon for bringing us SPEkTRUM.
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