T.R | Title | User | Personal Name | Date | Lines |
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521.1 | SORRY, BUT.......... | PNO::CASEYA | THE DESERT RAT (I-RC-AV8) | Mon Apr 25 1988 15:22 | 31 |
| Diane,
I hate to be the bearer of bad tidings but your rig isn't on _any_
channel legal in the U.S. Different countries use different frequency
bands, most of which (if not all) _do_not_ correspond to the band(s)/
frequencies assigned by the F.C.C. in the U.S.
As a courtesy to foreign competitors in world competition events,
the host country will usually allow the temporary use of the foreign
frequencies but "temporary" is the key-word in this special
circumstance.
I'm afraid, the only way for you to legally use/race with the radio
you purchased in Hong Kong is to send it to the U.S. distributor for
that radio and have the frequency changed to one of the legal channels
assigned to R/C surface vehicles (cars/boats) by the F.C.C.
I've deliberately overused the word legal because it is, indeed,
against the law to operate on any but the F.C.C. assigned frequen-
cies and, while it doesn't happen often, the F.C.C. can impose severe
fines/penalties for operalting on illegal frequencies/bands.
Unfortunately, you have only two alternatives: have the frequency
changed or purchase a new radio. What you've run into here is one
of the drawbacks to buying radio gear in a foreign country.
|
| | 00 Adios, Al
|_|_| ( >o
| Z__(O_\_ (The Desert Rat)
|
521.2 | It's doable- maybe even cheaply... | MIDEVL::YERAZUNIS | Where do those things come from, anyway? | Mon Apr 25 1988 16:18 | 20 |
| You can probably (!) do OK if you just change the crystal. Most 27/29
MHz low power radio transmitters do not use an awful lot of critical
tuning in the transmitter final; it's just a brute-force linear amp.
Going from 27 to 29 MHz is a lot less brutal than 27 to 72.
Write to the manufacturer; you may be in luck and only need a new
pair of crystals (which you can swap in yourself).
If the mfg. says it's OK, but you are afraid to do it yourself, find a
radiotelephone licensee and have them do it. Have the mfg's letter
saying it's OK to do handy for them to read; _I_ certainly wouldn't do
it unless I had either a specific go-ahead from the manufacturer or a
benchful of test equipment.
Good luck;
\__ -Bill
{((___O===--0' Yerazunis
(FCC Commercial TPhone/Radar PG-2-4483)
|
521.4 | | FSTVAX::WIMMER | | Mon Apr 25 1988 16:59 | 6 |
| The guy in the hobby shop in Georgetown told me 29 Mhz is a new
frequency assigned to RC -- just not available here yet. Is that
possible? How do I find out for sure? They guy in Hong Kong checked
it against a list and said it was okay too????
Diane
|
521.5 | AMA headquarters | K::FISHER | Battery, Mags, & Gas Off! | Mon Apr 25 1988 17:43 | 11 |
| > The guy in the hobby shop in Georgetown told me 29 Mhz is a new
> frequency assigned to RC -- just not available here yet. Is that
> possible? How do I find out for sure? They guy in Hong Kong checked
> it against a list and said it was okay too????
Call the AMA at (703)435-0750
Bye --+--
Kay R. Fisher |
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521.6 | BETTER GET IT FROM THE HORSE'S MOUTH.... | PNO::CASEYA | THE DESERT RAT (I-RC-AV8) | Mon Apr 25 1988 18:32 | 34 |
| RE: .2 & .3,
Moving to 27mhz _might_ be a viable alternative for a _car_. With
the abundance of high-powered 27mhz CB rigs in every other car or 18-
wheeler, I'd certainly never consider 27mhz for aircraft use. Also,
though I no longer know what they are, there are specific frequencies in
the 27mhz band for model use; you can't retune just _anywhere_ you'd
like in the band.
RE: 4 & 5,
I'm certainly not gonna' question anyones veracity but, as far as
I know, have heard or read, the _only_ frequencies legally allocated
for model useage are the old 27mhz frequencies (which virtually
_no_one_ trusts to use] the 72-75mhz freq.'s designated for exclusive
use by model aircraft, cars/boats and the 6-meter HAM-band which
requires a Technicians' License from the F.C.C. to use legally.
I've, personally, never heard of a new, upcoming 29mhz band (though
I've learned enough over the years not to bet against it). Frankly,
I can't imagine why we'd need more frequencies...we've got more
than we can effectively use right now.
Diane, I think the best thing you can do is to take Kay's advise
and call the AMA for a first-hand answer (and PLEASE post AMA's
response here). You may have to ask for the Frequency Coordinator
or whatever they call him to get your question answered.
|
| | 00 Adios, Al
|_|_| ( >o
| Z__(O_\_ (The Desert Rat)
|
521.7 | Just to add some confusion.... | SNDCSL::SMITH | William P.N. (WOOKIE::) Smith | Mon Apr 25 1988 20:10 | 4 |
| I thought the AMA (Association of Model Aeronuts) only dealt with
planes?
Willie
|
521.8 | More on Frequencies | SACMAN::ROSS | | Mon Apr 25 1988 23:09 | 15 |
| -<A Related Question...>-
I have recently ordered a second Futaba R2GS receiver on
Channel 84 (75.870 MHz) in order that I might use my Futaba
FP-3EGX marine transmitter with a second boat. Futaba
tells me I can be confident that the second receiver will be
fine-tuned to the proper frequency (75.870), and should work
with no problem with my existing transmitter. Can I trust their
claim? Is there some relatively simple way the precise tuning
of my original TX and the new RX can be checked? Can anyone
recommend a place to do this, preferably in the Boston area?
Thanks in advance.
Bob Ross
|
521.10 | | DRUID::TRUEBLOOD | still in training | Tue Apr 26 1988 13:42 | 5 |
| I've got a Futaba supplied F.C.C. Frequency Allocation
chart at home which I'll post if no one else comes up
w/ the same info prior to then....
DougT
|
521.11 | Futaba sez.... | DRUID::TRUEBLOOD | still in training | Wed Apr 27 1988 11:28 | 12 |
| The list from Futaba doesn't list 29Mhz as a U.S. freq.
They don't bother to date the list, but on the other hand
it's from a fairly recent production run ( Consider that
a disclaimer, I'm merely an instrument to transfer this
from paper to notes...;^)
26MHz to 27MHz Air/Car/Boat
72/75MHz Air
75MHZ Car/Boat
53MHz Air/Car/Boat-FCC License req
DT
|
521.12 | might be in the HAM band | CHGV04::KAPLOW | sixteen bit paleontologist | Sun May 01 1988 01:53 | 10 |
| It's been a while since I've been current on frequency allocation,
but 29.xxx may be in (or at least near) the 10 meter ham band.
While it might be legal to use such a frequency with a HAM
license, I doubt that any contest will allow the use of such an
odd-ball frequency, license or not. When shopping abroad, be
POSITIVE you know what you are buying; its too easy for a good
deal to turn around and bite you.
Bob WB9WDV
still doing RC on 53.x, legally
|
521.13 | ROAR phone number | K::FISHER | Battery, Mags, & Gas Off! | Mon May 02 1988 10:55 | 12 |
| Just read a note last night in the latest issue of RCM.
ROAR has moved and here is there new phone number.
(404)543-8908
If you call them and they haven't heard about any new 29 Mhz surface
frequencies then you have definitely been Hong Konged.
Bye --+--
Kay R. Fisher |
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521.14 | Whoops! | FSTVAX::WIMMER | | Mon May 02 1988 14:19 | 17 |
| Well, Kay was right -- I've been Hong Konged!!
Tried AMA several times -- couldn't get ahold of the right guy.
Called the ROAR number today, they didn't know but referred me to
Bob Novak, Novak Electronics. Turns out that 29Mhz is indeed a
ham radio band and is usable WITH a license. He said it wasn't
really worth it getting the license though, as I'd be fighting
interference with the radios all the time. So....... it's time to
find out how to get my receiver retuned. Oh well, so much for a
good deal!
In defense of the guy in Georgetown, he wasn't sure, but said there
was a new frequency, and thought it must be the one since the guy
in Hong Kong supposedly checked it out for me.
Diane
|
521.15 | 29.875 MHZ is not ham frequency | AUGGIE::WFIELD | | Mon May 02 1988 15:31 | 11 |
| Still not quite right. The 10 Meter Amatuer radio band
covers 28.000 - 29.700 MHz, so the frequency you mentioned
is not usable by U.S. Amatuers either. Also someone mentioned
a couple of replys ago the use of the 6 Meter amatuer band
using the 53 MHz frequencies. The information I have says that
those frequencies are expected to vacated by 1990, and 50.80 -
50.98 MHz should be used. This allows 10 channels with 20Khz spacing.
Are there any hams out there that know of any equipment available
on the new frequencies?
Wayne
|
521.16 | 53 Mhz to reman usable past 1991 | CHGV04::KAPLOW | sixteen bit paleontologist | Tue May 03 1988 00:47 | 15 |
| Re: .15
The 53 MHz frequencies should be usable for RC indefinitely. The
disadvantage is that they may be close to amateur repeaters
operating in your area, that might cause interference problems; no
different than the problems on 72/75 MHz. They are also right next
to TV channel 2, which can also cause interference if it is in use
in your area. There is a channel 2 in my area, but I've never had
any problems there in almost 10 years of use. By mutual agreement
(according to FCC laws, you can do just about anything you want
with the proper license) there will be no such repeaters in the 50
MHz portion of the Ham band where RC 00 thru 09 are allocated.
They are at the opposite end of the band from channel 2, so these
may be a better choice for new gear, but at least my old gear
should be legal past 1991.
|
521.17 | close but no cigar | FSTVAX::WIMMER | | Tue May 03 1988 12:51 | 10 |
| Actually, I made a mistake on the frequency (memory is going!) --
my frequency was 29.695, and my friend's is 29.605.
Meanwhile, I lucked out. Talked to the hobby shop, they will loan
me a receiver while sending mine back to Futaba for retuning. I'm
in the process of swapping receivers and crystals now so I can check
it out before sending mine off for 6 weeks.
Diane
|
521.18 | oh well | FSTVAX::WIMMER | | Tue May 03 1988 14:56 | 8 |
| Well, I really got Hong Konged! I swapped the receivers and crystals
and it didn't work -- car had seizures. Upon further research,
I am told transmitter itself has to be retuned (a capacitor??).
At this point, it looks like it may be cheaper to just give up
and buy a new radio. Such a deal I got!!
Diane
|
521.22 | Such a deal..... | MDSUPT::EATON | Dan Eaton | Wed May 04 1988 12:28 | 29 |
|
> Well, I really got Hong Konged! I swapped the receivers and crystals
> and it didn't work -- car had seizures. Upon further research,
> I am told transmitter itself has to be retuned (a capacitor??).
> At this point, it looks like it may be cheaper to just give up
> and buy a new radio. Such a deal I got!!
> Diane
Diane,
since misery loves company maybe you'll appreciate this story. A friend of mine
wanted a Hirobo 1/7 scale Huey helicopter. His wife went on an around the world
cruise that stopped in at Hong Kong. He talked her into stopping in at a shop
and calling him at home. He told the shop owner what he wanted, they gave his
wife a cup of tea and wrapped the copter up for her. They even called a taxi
to take her back to the boat.
When she got back home they found out that the box contained a Hirbo 1/8 scale
Huey. Cost of a Hirbo 1/7 scale Huey: $1200 (At that time). Cost of a Hirobo
1/8 scale Huey: $600. Such a deal he got!
He had a friend that was going back to Hong Kong in a couple of weeks so he
gave him all the documents and asked him to stop in the hobby shop and
straighten out this little mis-understanding. The shop owner said he was sorry
but the shop had changed ownership since the sale and the new owners were not
responsible for the previous owners mistakes and no, they didn't know the where
abouts of the previous owners
Dan Eaton
|
521.23 | not so bad after all | FSTVAX::WIMMER | | Wed May 04 1988 13:52 | 7 |
| Actually I came out better on this deal than I should have......My
friendly hobby shop man sold me a Futaba Magnum Jr. with receiver
for $45 + the extra servo I had. Since I only spent $35 for the
Futaba Attack in Hong Kong, I still got the Magnum for $80. Meanwhile,
I sent the other radio and receiver back to Futaba for retuning,
and can sell it to the hobby shop when it comes back. So, my Magnum,
Jr., in the end, will still be a good deal!
|
521.24 | Tuning (labor) isn't bad, pricewise. | SNDCSL::SMITH | William P.N. (WOOKIE::) Smith | Wed May 04 1988 18:05 | 6 |
| With the exception of the crystals [$14 each seems a bit steep to
me.....], the labor for retuning is just a few bucks each for the
transmitter and receiver, so that's probably not a bad idea. Where
did you manage to find a hobby shop that will deal with used equipment?
Willie
|
521.25 | Georgetown | FSTTOO::WIMMER | | Fri May 06 1988 15:30 | 10 |
| The price on the crystals was for two.
Pratt Coin & Hobby in Georgetown will take tradeins pretty regularly.
He has a pretty good stock of used stuff and rebuilt stuff. Really
nice
guy! He's in Georgetown Square on Route 133 off 95 or 495. Route
97 also takes you right into Georgetown Square. If you talk to
him, tell him I sent you.
Diane
|
521.26 | | SNDCSL::SMITH | William P.N. (WOOKIE::) Smith | Sat May 07 1988 11:02 | 6 |
| Thanks, Diane!
I don't get to Georgetown too often, but I do goto Ipswich almost
weekly, I'll have to check him out.
Willie
|
521.27 | real close to Ipswich | FSTVAX::WIMMER | | Mon May 09 1988 12:15 | 6 |
| Georgetown is only 15 minutes from Ipswich. Just take 1A North,
left onto 133 right into Georgetown square. He's on the right,
in the block before the blinking traffic light (row of grey buildings).
Diane
|
521.28 | passin through | MTBLUE::BARNABY_GALE | | Wed Jun 15 1988 04:18 | 16 |
| re.6
hello, I was just browsing trying to find a list of frequencies
and bandwidths you use for RC. you mentioned frequencies on the
CB radio band for RC. I don't know if they are still used but the
following were radio control freqs.
26.995
27.045
27.095
27.145
27.195
can't say I would use these for anything critical, since I have
heard some pretty strong signals with hispanic accents.
I could just see a 27mhz garage door opener and a mercedes:^)
lata...galen
p.s. I am still looking for the list of freqs.
|