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-   -   Spektrum (https://www.rctech.net/forum/radio-electronics/63411-spektrum.html)

Davenport 02-17-2005 07:42 PM

Just thought you guys would like to know I sent Horizon an email in regards to our issues on the spektrum. It stated...

You might want to check out the forum "Spektrum" on rctech.net. Several people including me are having major problems with your product that need to be addressed by a HORIZON REP! My problem with the spektrum is that the steering is delayed and sluggish. Its almost impossible to drive in my application. Im racing a TC with foam tires on a very small indoor carpet track, 7 second laps small. Im running a Novak GTX ESC and Futaba 9402 servo. People are running caps that are plugged into the BEC slot in the receiver saying this is fixing their steering issues. Do you recommend this? Is it possible that my Spektrum is an older version? Please respond. To me and all of the others that have spent the $170 dollars on your product!

Hopefully we will get some answers!!!!!!

revzalot 02-17-2005 07:44 PM

RCMan,

Can you post the specs that you have on your Spectrum manual? I'd like to know the Latency value of the kit. Thanks.

SteveP 02-17-2005 07:50 PM


Originally posted by scoobydo
The Cap solution makes sense.
In the recent RCCA article they make mention that while the Transmitter draws less power on your batteries,
the reciever actually draws more power than a normal reciever. Something like Double if I remember correct.
They quickly mention this problem but then cover it right up by saying how much more power your saving on your transmitter.
Correct me if I'm wrong, but I could care less about my transmitters draw! The most important is the recievers draw.
I don't see how they could have missed this in all the "testing" they say they did.
Oh, well. Time will tell.

I did the test on the Spektrum for Car Action. I'm not sure I follow the logic of mentioning the fact that the receiver draws more current, then "covering it up." I don't know how you would write something in plain English and THEN cover it up. It's mentioned clearly in the article, outlining how much current the Spektrum receiver requires compared to that of a standard receiver. Then it's mentioned a second time in the specs. :weird: For the record, it draws 40 milliamps, which is 0.04 amps. When you have a BEC that's rated at 1.6 amps, that's 1600 milliamps. That means the receiver is using 40 out of 1600 milliamps. The Q2 puts out 5.8 volts, so the power requirement drops to about 30 milliamps.

I've been testing the Spektrum for more than two months. I tested it in my XRAY T1FK under many conditions, but the vast majority of the testing was at Hobby Chamber in front of many other racers that are probably members of these forums. It's a medium-size indoor carpet track on which the Carpet On-Road Nats will be run in a month or so. The system still continues to perform flawlessly to this day and I've never had an issue with response time. I've had other drivers wheel my car around and the consensus is, the system is blazing fast. I tested the system thoroughly and stand behind the article 100-percent, which is more than can be said by everyone who "tested" it. I didn't "miss" anything. I tested and researched the crap out of it, but if you're still so sure that it's not to your standards, you're more than welcome to come to the track and wheel my car around for the day with the exact same system I tested for the article.

P.S. I also tested it with two different speed controls - first the LRP Q2 and then the KO Propo VFS-Pro. There was no issues with either of the ESCs or their BEC circuits.

SteveP 02-17-2005 07:52 PM


Originally posted by revzalot
RCMan,

Can you post the specs that you have on your Spectrum manual? I'd like to know the Latency value of the kit. Thanks.

The latency is 5.6 milliseconds.

Davenport 02-17-2005 07:53 PM

Thanks SteveP

Soviet 02-17-2005 08:21 PM

Oh well...at least the rest of us have let the Airtronics guys work out the bugs! (If there actually are any) :D

By the time they release the KO and other units, all this internet buzz will of died down...because yes...negative internet buzz can hurt lap-times...;) :lol:


Again...it all boils down to.

FUD - Fear Uncertainty and Doubt.

revzalot 02-17-2005 08:43 PM

SteveP,

So you would recommend for a separate receiver pack when using the QC2?

Racer Z 02-17-2005 08:45 PM

SPEKTRUM
 
Hey Soviet!! I still have'nt figured out why my spektrum keeps shutting off when I get hit or the car flips over. Everytime it does the car will go dead and the receiver will have to be turned off and back on to get it to run again. Josh at the track and anothe guy was having the same problem as I. I think it's time to send a letter also to horizon!! Think go I didn't get rid of my module and crystals.

Melvin

Soviet 02-17-2005 08:53 PM

Re: SPEKTRUM
 

Originally posted by Racer Z
Hey Soviet!! I still have'nt figured out why my spektrum keeps shutting off when I get hit or the car flips over. Everytime it does the car will go dead and the receiver will have to be turned off and back on to get it to run again. Josh at the track and anothe guy was having the same problem as I. I think it's time to send a letter also to horizon!! Think go I didn't get rid of my module and crystals.

Melvin

Melvin?

Was McDaniels pitting next to your stuff tonight?

Anyhow...if YOU say that you've been having problems...then I'll say that there's something to the rumors. However I tried Larry's a few nights ago and it was fast, clean and clear.

Well...anyhow...hopefully by the time the KO units come out, it'll be a-ok. Whatever the problem may currently be.

Of course..like all new products...especialy like computer hardware. etc...The initial release of hardware always has some issues that need to be worked through. I suppose being that I build custom gaming PCs I'm used to initial release hardware being flakey.

Example: Don't ever buy version 1.0 of ANYTHING electronic...always wait for one or two revisions down the line.

SteveP 02-17-2005 09:17 PM


Originally posted by revzalot
SteveP,

So you would recommend for a separate receiver pack when using the QC2?

I ran the QC2 without any problems at all, so based on my experience, I don't recommend doing anything different that what you would do with a normal radio. There's few guys running the Spektrums at our track now, and none of these issues have come up yet.

403forbidden 02-17-2005 09:35 PM


Originally posted by Soviet
Oh well...at least the rest of us have let the Airtronics guys work out the bugs! (If there actually are any) :D

By the time they release the KO and other units, all this internet buzz will of died down...because yes...negative internet buzz can hurt lap-times...;) :lol:


Again...it all boils down to.

FUD - Fear Uncertainty and Doubt.


Amen brotha

You kNow there's certaiN compaNies shakiNg iN their boots right about Now woNdering what they are goNNa do with all their extra little thiNgs.

rovic 02-17-2005 09:52 PM


Originally posted by SteveP
I did the test on the Spektrum for Car Action. I'm not sure I follow the logic of mentioning the fact that the receiver draws more current, then "covering it up." I don't know how you would write something in plain English and THEN cover it up. It's mentioned clearly in the article, outlining how much current the Spektrum receiver requires compared to that of a standard receiver. Then it's mentioned a second time in the specs. :weird: For the record, it draws 40 milliamps, which is 0.04 amps. When you have a BEC that's rated at 1.6 amps, that's 1600 milliamps. That means the receiver is using 40 out of 1600 milliamps. The Q2 puts out 5.8 volts, so the power requirement drops to about 30 milliamps.

I've been testing the Spektrum for more than two months. I tested it in my XRAY T1FK under many conditions, but the vast majority of the testing was at Hobby Chamber in front of many other racers that are probably members of these forums. It's a medium-size indoor carpet track on which the Carpet On-Road Nats will be run in a month or so. The system still continues to perform flawlessly to this day and I've never had an issue with response time. I've had other drivers wheel my car around and the consensus is, the system is blazing fast. I tested the system thoroughly and stand behind the article 100-percent, which is more than can be said by everyone who "tested" it. I didn't "miss" anything. I tested and researched the crap out of it, but if you're still so sure that it's not to your standards, you're more than welcome to come to the track and wheel my car around for the day with the exact same system I tested for the article.

P.S. I also tested it with two different speed controls - first the LRP Q2 and then the KO Propo VFS-Pro. There was no issues with either of the ESCs or their BEC circuits.

the issue is the servo, with me...
with out the cap, i could not work and with it; it operates like described.

now the question is do you believe or know that under certain conditions motor drain can cause a loss of power to the reciever? no matter if it is novak/spektrum/airtronics the reciever is vulnable under high amp draw conditions. in 1993, mayfield used 2 caps on his reciever to prevent from happening, i believe it was documented in car action.

ritchie 02-17-2005 11:06 PM

well, i just installed the novak cap and my jr 4750 and futaba 9402 are working perfectly again. thanks again PIT CREW.

what i don't understand is how a person can call reported problems with a product "rumors" and fear and also end a post with the following statement

Example: Don't ever buy version 1.0 of ANYTHING electronic...always wait for one or two revisions down the line.

not attacking just confused, sorry if i offened anyone.

Soviet 02-17-2005 11:14 PM


Originally posted by ritchie
well, i just installed the novak cap and my jr 4750 and futaba 9402 are working perfectly again. thanks again PIT CREW.

what i don't understand is how a person can call reported problems with a product "rumors" and fear and also end a post with the following statement

Example: Don't ever buy version 1.0 of ANYTHING electronic...always wait for one or two revisions down the line.

not attacking just confused, sorry if i offened anyone.

RUMORS because people were claiming that it was REALLY slooooooow, and being "Covered up" by magazines, people etc.

I'm sorry...it's not the Spektrum system..it's a servo incompatibility...it has what to do with the signal or DSP speed???

Oh..thats right...nothing.

Anyhow...if there are servo incompatabilities, or whatever..so be it, it goes with the territory. (Thats what I meant about not buying v1.0 of something)

...However DON'T try to convince me that one can actually feel a .2ms lag in SIGNAL response time...which is what the initial posts were eluding to.
(If you can...then I suppose the government experiments were a success. ;) )


Thats what I was getting at.

- Sov out-

vanguard 02-17-2005 11:45 PM

your rumors and fear post was the 12th post on the first page, the "cover up" post was the 10th post on the third page, so don't even bring that up. and you agree that there is lag in response, you just don't think anyone can tell. so here we are, youv'e disputed your own posts and are backed into a corner, i guess now is when you go into attack mode. people were having issues and posted so. someone (PIT CREW) found a fix. and those that have tried it are happy and say it works. fold it up, put it in a box, shake it, spin it, spread it out anyway you want, you were WRONG
nice try.


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