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Model Forum / Radio Controlled / Land Models / January 2006Remote Control
I have a new RC Car but no remote, it says 27mhz on the bottom. Any suggestions on a cheap remote for this? Do I need to configure anything special on a remote or does it being 27mhz pretty much cover it? Thanks for any help. Jamie > I have a new RC Car but no remote, it says 27mhz on the bottom. Any > suggestions on a cheap remote for this? Do I need to configure anything [quoted text clipped - 3 lines] > > Jamie 27 MHz is the general band. there are individual channels within the bands that can be used. the 27 MHZ band is the frequency used by the very cheapest toy class of RC vehicles and there aren't any separate receiver/transmitter pairs you can buy that i know of. these radios are almost never crystal controlled so one transmitter will most likely not work with a different car and they cannot be changed unless you are an electronics hobbyist who is willing to tweak. if you got this car used or free the only thing you can do is try to find out what happened to the lost remote. 27 MHz RC stuff is usually junk. i wouldn't recommend spending any money to upgrade this car, you can probably buy a better one for 29.95 at Radio Shack. There is a chance you might find a 27 MHz transmitter in a junk shop but it is probably not going to work with this car. Real RC radios use 49 or 75 MHZ bands or higher. some even use 2.4 GHz like cordless phones. If the car is something special you might get a radio for it and make it work with quite a bit of effort but it will cost you $50 or so and for that price you can get the whole thing. If you really want to get into RC cheap check out Radio Shack. If you want to see what kind of products are available for $100 or more check out towerhobbies.com... good luck -bob >> I have a new RC Car but no remote, it says 27mhz on the bottom. Any >> suggestions on a cheap remote for this? Do I need to configure anything [quoted text clipped - 28 lines] > > -bob Where the hell have you been? Lots of radios currently available in 27Mhz made by Futaba, JR, Hitec, Airtronics............................my $1000 Savage runs on the stock 27Mhz Futaba system it came with. Should I throw it away? Doc are there any way to find excat channel on toy car. ( i mean cheap toy car) only labeled as 27MHz. Have 2 toy cars in 27MHz with out radio. dose any 27 radio work with this. I try with one but no luck. ( it has 27.145MHz crital on pcb ). thanks for any clue. ( im new to this ) > are there any way to find excat channel on toy car. ( i mean cheap toy > car) only labeled as 27MHz. > Have 2 toy cars in 27MHz with out radio. dose any 27 radio work with > this. I try with one but no luck. ( it has 27.145MHz crital on pcb ). > > thanks for any clue. ( im new to this ) As you have found the crystal in the car then yes you can try a normal trigger or stick type R/C transmitter with the car, depending on how sophosticated it is it might work then again it might not. Just make sure you borrow a 27Mhz AM (not FM) transmitter with a Yellow 27Mhz crystal in it. Yellow is the colour assigned to 27.145Mhz, there are 6 others on the 'solid' channels but there are another 6 channels (called 'splits') available which sit between the 'solids'. Look at the crystals shown here to see the connection between colour and frequency: http://www.rccarsandtrucks.co.uk/502_1.html Chris "Doc" wrote: >>>I have a new RC Car but no remote, it says 27mhz on the bottom. Any >>>suggestions on a cheap remote for this? Do I need to configure anything [quoted text clipped - 34 lines] > Savage runs on the stock 27Mhz Futaba system it came with. Should I throw > it away? I stand corrected, Doc. I expected that because his car says 27 MHz and he didn't mention a channel number that it was a cheap toy. I switched from AM to FM 10 years ago or so. I haven't looked at radio gear for quite a few years but nobody I know here in Northern California runs 27 MHz. I see that you can still get a radio/servo Airtronics or Futaba AM setup from Towerhobbies for as little as 43 bucks or so and that they still offer 27 MHz as an option. I would never consider an AM radio as anything more than a kid's toy and FM radios don't run at 27 MHz as far as I can see with a cursory look. I thought that because of all the interference from the CB radio idiots in the 27 MHz band who run illegal high power amps that splatter all over the spectrum that the 27 MHz band had become useless. I would certainly not take the chance that some jerk running 1000W into his CB (and there are lots of them here)would crash my $1000 plane. I don't know if there are any FM PCM radios running 27 MHz but I doubt it. 49 and 75MHz have more range in general, and all the latest radios I've seen for use with planes are in the 2.4 GHz range. The guys here that run 1/10 scale use 75 and 27 isn't legal in races as far as i know. The higher frequency gives much better bandwidth so you can have more channels, more range, and is generally more reliable. All I was trying to do was help the guy understand that he might not want to put much money into a 27 MHz car when you can get so much more for the money now than you could then. I'm glad you are here to give the part of the story I missed. thanks... > Doc Inline......................... > I haven't looked at radio gear for quite a few years but nobody I know > here in Northern California runs 27 MHz. I see that you can still get a > radio/servo Airtronics or Futaba AM setup from Towerhobbies for as little > as 43 bucks or so and that they still offer 27 MHz as an option. Just about every hobby-grade RTR out there comes with a 27Mhz radio installed. > I would never consider an AM radio as anything more than a kid's toy and > FM radios don't run at 27 MHz as far as I can see with a cursory look. Tell ya what, I've run AM 27, AM 75 and FM 75 and honestly can't tell the difference between any of them per way of signal range, speed, clarity and interference. The el cheapo AM 27 that came with my Savage is every bit as good as my $200 Airtronics FM 75Mhz radio. It looks a helluva lot uglier, but works just as well both on and off the track. > I thought that because of all the interference from the CB radio idiots in > the 27 MHz band who run illegal high power amps that splatter all over the > spectrum that the 27 MHz band had become useless. I would > certainly not take the chance that some jerk running 1000W into his CB > (and there are lots of them here)would crash my $1000 plane. I don't know > if there are any FM PCM radios running 27 MHz but I doubt it. I think you're right. I've seen lots of AM 75 radios but haven't seen any FM 27 radios. FWIW, my primary bashing spots are all less than 0.5 miles from the Interstate and I've never had interference issues with the 27 Mhz radios. The toy class radios maybe, but the narrow-band 27's are pretty darn stable. > 49 and 75MHz have more range in general, and all the latest radios I've > seen for use with planes are in the 2.4 GHz range. The guys here that run > 1/10 scale use 75 and 27 isn't legal in races as far as i know. The 2.4Ghz stuff interests me; have you seen the new Nomadio radio? Doc > I would never consider an AM radio as anything more than a kid's toy and > FM radios don't run at 27 MHz as far as I can see with a cursory look. ... > know if there are any FM PCM radios running 27 MHz but I doubt it. Cursory indeed. There are FM and PCM radios in the 27Mhz band. > seen for use with planes are in the 2.4 GHz range. The guys here that > run 1/10 scale use 75 and 27 isn't legal in races as far as i know. Perfectly legal, although many tracks encourage 75MHz because there are more discrete channels. Rick R. Thanks for the info. I have no way to recover the original remote, and it is a cheap car so I will probably just scrap it. At least I learned something in the process. Jamie >> I have a new RC Car but no remote, it says 27mhz on the bottom. Any >> suggestions on a cheap remote for this? Do I need to configure anything [quoted text clipped - 17 lines] > might find a 27 MHz transmitter in a junk shop but it is > probably not going to work with this car. Erm.... > Real RC radios use 49 or 75 MHZ bands or higher. some even use 2.4 GHz > like cordless phones. If the car is something special you might get a > radio for it and make it work with quite a bit of effort but it will cost > you $50 or so and for that price you can get the whole thing. You're just making up random 'facts' now aren't you. > If you really want to get into RC cheap check out Radio Shack. If you > want to see what kind of products are available for $100 or more > check out towerhobbies.com... good luck I run 27mhz in my Sav and my TS4N, and 49 and 75 are illegal in the UK. What can possibly make one freq. set better than another? As for wanting to get into RC cheap with 27mhz - Do my Sav and TS4N count as cheap, and the RallyX buggy I recently flogged - combined expenditure probably over £2000ukp. To the OP - any 27mhz remote with a crystal on the same frequency as the RC will work it.  SignatureDan > To the OP - any 27mhz remote with a crystal on the same frequency as the > RC > will work it. How do I find the frequency of the RC? Any suggestions on a cheap remote to tune to that frequency? >> To the OP - any 27mhz remote with a crystal on the same frequency as the >> RC [quoted text clipped - 3 lines] > > Any suggestions on a cheap remote to tune to that frequency? Make and model of the r/c to which you are referring to? Let's find out what we're dealing with first. Doc "Doc" wrote: >>>To the OP - any 27mhz remote with a crystal on the same frequency as the >>>RC [quoted text clipped - 8 lines] > > Doc thanks, Doc for correcting me. I had no desire to give out the wrong info. sometimes my desire to help a fellow RC'er overcomes my need to be right. I am new to this list and will try to do better in the future. My experience is that receiver crystals for Airtronics and Futaba will be different frequencies because the receivers use different IF frequencies. I gave up using AM radio years ago because the RF noise generated by my 12T 7 cell setup caused problems. I cannot say that a lower powered vehicle would have the same problems. I definitely have found that 75 MHz gives me better range than the 27 MHz rig I ran 20 years ago. The CB radio operators who operate illegally at more than their legal limit (<5w legal 1000w typical for the illegal) caused me a lot of problems. For this reason I switched to 75 MHz and I found I had better range and no more interference problems. I will sit back and listen for awhile unless something comes up that is really within my area of expertise. RC is a great hobby and lots cheaper and less painful than racing dirt bikes like i used to do in my youth..... -bob Inline......................... > thanks, Doc for correcting me. I had no desire to give out the > wrong info. sometimes my desire to help a fellow RC'er overcomes > my need to be right. I am new to this list and will try to do > better in the future. No need to apologize! We all make mistakes; god knows I do.............. > My experience is that receiver crystals for Airtronics and Futaba > will be different frequencies because the receivers use different > IF frequencies. The 27Mhz "channels" are all on the same frequency. While it wouldn't be a good idea to mix brands on rx and tx, using Futaba crystals in an Airtronics system should be ok. > I gave up using AM radio years ago because the RF noise generated > by my 12T 7 cell setup caused problems. I cannot say that a lower > powered vehicle would have the same problems. I definitely have > found that 75 MHz gives me better range than the 27 MHz rig I ran > 20 years ago. 27Mhz systems are indeed more suseptible to interference caused by high-end brushed motors. Were you running any resistors on your motor? Usually a couple 0.1 microfarad capacitors will kill the interference and allow the use of a 27Mhz system. Perhaps your observations on 27Mhz vs. 75Mhz are skewed d/t the fact that the 27Mhz radio was much older than the 75Mhz radio? > I will sit back and listen for awhile unless something comes up > that is really within my area of expertise. > > RC is a great hobby and lots cheaper and less painful than racing > dirt bikes like i used to do in my youth..... Indeed! My wife is tickled I now spend my money and time on 1/8 stuff instead of 1:1 stuff. Even at $25/gallon for nitro it's still cheaper to feed these guys than my former "toys!" Doc Playing in the park I never had any problems with AM, even when running with 2 or 3 other people. Racing with 8 other drivers standing shoulder to shoulder in a metal building I have had countless problems with AM. I was swapping out recievers, crystals, everything to get rid of the glitching. While driving down the back straight in one race I had my truck stop and go into full reverse by itself. I had a marshall pull the truck and finally took the advice of the veterans and bought an Airtronics FM radio. Since then I have not had a single case of glitching while bashing or racing. Watching the beginners class made up of mostly RTRs I have seen that same scenario repeated over and over. My personal advice for what it's worth (not much I know) if your going to be running alone or with a few radios spread out, AM is fine. If your going to be on a drivers stand with a bunch of other radios, FM is the only way to go. > Playing in the park I never had any problems with AM, even when running > with 2 or 3 other people. Racing with 8 other drivers standing [quoted text clipped - 12 lines] > your going to be on a drivers stand with a bunch of other radios, FM is > the only way to go. i'm a power maniac who runs a 12T 7 cell setup, sometimes an 11T. there aren't enough capacitors in the world to stop that from screwing up a 27 MHz AM radio system. that's why i had to switch to 75 MHz FM even for bashing around on my property here in the foothills. thanks for your tolerance... -bob |
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