This is great!! I can't wait to get started.

I soldered in a USB plug from a cheap 4 port hub I got from ebay for a buck. Works out a lot better than the pin header in my opinion..... Looks ok too. Have to put a bigger hole in your radio, but I filled mine back in with styrene to finish it off and painted it so it looks kinda like it is supposed to be there.

Sorry guys, been away from rctech for awhile....been really busy.

To answer your question, i offer all the stuff on my website to make ordering easy. Here is just the 4 pin header that i include with my gt3b kits

http://overkillrc.3dcartstores.com/G...ader_p_15.html

So i got my mouser order today, I did the Voltage regulator mod already and it works. I then proceeded to try and reprogram the radio, this is when it went downhill lol

Started by soldering a 4 pin plug onto the radio pcb
Desoldered the Sb1 - Sb2 points
Hooked up the stm8s to pc, Installed stvp from overkill rc's link (running windows 7 btw)
I was getting stvp stopped working crashes, So i then found the link to the patch for stvp. after i got that installed, i no longer got crashes trying to read the radio, but now i was getting cannot read swim error. I also tried doing what losi kid had suggested procedure after i snapped the stm8s in half. here

I have tried this on 2 systems, Windows 7 and on another computer running windows XP. I've tried normal stm8s board, snapped board, 2 different female molex cables. different usb ports, powered by thd stm8s, powered by the batteries. I checked my solder joints to the pin header and all are nice, neat and clean. Using a 3 pin cable, using a 4 pin cable, flipping the cables every which way. I'm at a lose here and have been messing with this for the last 4 hours trying to get it to work, any help would be appreciated

Well, i can't really give any suggestion if you broke your board in two...it makes matters worse imo.

I have found though, that these are very picky about being programmed. MAKE sure you follow those steps i posted to the T. Start out fresh, make sure stvp is closed out.

Plug in the radio BEFORE opening stvp.

I don't have enough experience with the broken board to help you beyond that.

I broke my board and then did the STM8S mod posted by 305.This way the radio is powered by the USB connection. Worked great for me running Win XP.

so i tried 305's mod and soldered the 2 traces together. Now the radio is powered by the board again. I plug the lead into the pin header on the radio, plug it into the board, plug the board in. Screen lights up and starts beeping. Open stvp and click read current tab and it gets a rear error still.

I then soldered the sb1 sb2 traces back together and tried the above steps again and it still does the same thing. I also reflowed my pin header on the radio and it didn't help either. This is very frustrating, im hesitant to open my other radio and try for fear of the same issue.

phew, i finally got it to work. I took the 4 wire connector i had and made it into a 3, deleting the 5v wire lead. Got my radio firmware installed and all calibrated now. So i had to plug the wire into the radio, then into the stm8s plugged it into the computer, turned radio on W/ battery power, launched stvp on a windows xp computer and it worked!

Good to hear

Now that i've gotten that out of the way. I did a second one this morning and took a total of maybe 20 minutes? Even had to fix a poorly fixed 2.4ghz antenna from the previous owner. Now I'm just waiting on my body reamer and lexan scissors to do the Bearing mod and cut out a new body lol. After i get that done i think i'm gonna be in the market for a lipo and a fancy aluminum steering wheel.

I have 2200Mah LSD nihm AA's in it now, but i dont like the weight of it. I have a AE 2.4ghz radio that only uses 6 and i like the feel of that much better. Anyone have suggestions for lipos and aluminum wheels? I've seen some of the aluminum wheels on Hobbyking, but dont much care for the style

This thread looks really cool . I might be getting a GT3B in a bit, so it'll be good reference for then.

I got the flash card, updated the radio about a year ago. I switched over to airtronics and put my two flyskys on the shelf. Now my son and I both have crawlers and want to dust these babies off to utilize 4-5 channels. My question might be a waste of time but here it is, for the 6 channel rx do I have to do anything extra? Is the needed programming already installed and I just don't know it? I don't have the 6 channel rxs yet. We want to add wenches, digs, and windshield wipers for our scalers.

Thanks for any help anyone can send my way.

You need the latest update for the radio, go into the global settings and change to the number of channels you need. The 6 channel air receiver binds to the GT3B the same way as the included 3 channel. I setup a winch on my scale crawler and it works great. Hope this helps.

Thanks for the fast reply, now I'm in pretty good shape for the shape I'm in..lol

Hi Guys

I'm just about to get back into RC cars are 20 odd years out of it and plan on starting slowly (and cheaply). Anyway I'm looking at getting the HobbyKing GTX3 which as far as I can tell is just a repackaged GT3C. Can someone confirm that, earlier in the thread is says some people can't get the firmware to load, but that was a while ago?

From there doing mods isn't a problem. I've already got a 9X TX with more mods than you can shake a stick at for my multi rotors.

Some questions though, is it worth running a LiPo in the GT3 or are some low discharge eneloops going to be fine? In the 9X the included battery holder is terrible so you need to replace the battery, wondering if that's the case here too? If it is, can you squeeze in the Turnigy Nano-tech 2500mAh 3S LiPo TX pack, or is the more common Turnigy 1450 pack a better fit? Assuming I go for the LiPo pack, how much more stress does that put on the voltage regulator? I see there is a mod to replace that with a switching regulator. Is that required if you switch to the LiPo or just nice to have?

Other than the firmware update (which will be fine), the bearing mod also seems popular. Is it better to do this right from the start so as not to wear out the plastic surfaces, or does it not really matter since you have to enlarge the hole anyway?

Finally, since there are 8 channels on the firmware update.... I assume there are receivers that will bind to this radio that make using all those channels possible? Can someone point me to them? HK would be ideal if they have them, but really just knowing which ones they are would be helpful.

Thanks