I'm not the sharpest pencil in the box - Page 4 - RCCanada - Canada Radio Controlled Hobby Forum
RCCanada - Canada's Radio Control Hobby Forum
General RC Aircraft Discussion Discuss anything RC related

Closed Thread
Thread Tools Display Modes
Old 04-25-2006, 03:43 PM   #31
I am: Boolean21
Join Date: Sep 2002
Location: Singapore

Feedback: 0 / 0%
Posts: 38,228
Total Props: 56
Re: I'm not the sharpest pencil in the box

       Remove this ad - become a site supporter!
Originally Posted by sivle
I am plaing with a full deck, how about you???
John John John I've told you before 52 jokers do not make a full deck.
PurgatorY is offline   Quick reply to this message.

Sponsored Links - Subscribe to remove this ad.
Old 04-25-2006, 04:35 PM   #32
RCC Junior Contributor
Join Date: Mar 2005
Location: Toronto

Feedback: 0 / 0%
Posts: 158
Total Props: 0

First off, when was the rules written? Reason I ask, is that technologies changes dramatically year by year. Hehe, or else we would be required to pull our cars over to the side of the road in the presence of a horse drawn buggy, turn it off, and dismantle it, in order not to cause emotional distress for the horse.

I have my jr tx or 2 years now, with a changed tx upon buying it. I had no problems and neither do other people by it.

I think the rules might be archeic. I do understand if you use a brand of crystal other than the brand of TX...like pop in a Fut crystal into a JR, that would be a bad idea! Anyway, has there been a recent study or physical research done on this subject, using lastest tx and actual experiments?
Oracle is offline   Quick reply to this message.
Old 04-25-2006, 05:08 PM   #33
RCC Senior Contributor
I am: Dave D
Join Date: May 2005
Location: Tecumseh,Ontario

Feedback: 1 / 100%
Posts: 561
Total Props: 1
Originally Posted by Shawn68z
I was waiting for this topic to come up again!

From the FCC


Subpart E—Technical Regulations
Sec. 95.645 Control accessibility.
(a) No control, switch or other type of adjustment which, when
manipulated, can result in a violation of the rules shall be accessible
from the transmitter operating panel or from exterior of the transmitter

(b) An R/C transmitter which incorporates plug-in frequency
determining modules which are changed by the user must be certificated
with the modules. Each module must contain all of the frequency
determining circuitry including the oscillator. Plug-in crystals are not
considered modules and must not be accessible to the user.


So the reason you can not change a TX'er is because there is possiblilty of causing interferance with other devices. You can change a RX crystal, and no one cares because you will not interfere with anything.
In the real world, changing your XTAL's in the TX'er acouple of channels up or down from the factory will not make _ANY_ difference at all.
Besides, if you are worried about loss of power make sure you send it in for tuning.

On a another note, doesnt that last paragraph from the FCC make my sport Futaba radio illegal (User accessable crystal) ?
Thats an FCC rule. The U.S. rules don't apply here(yet). The DOC does not have any statement on this. BTW that makes 90% of the car guys in the U.S rule breakers.
adaptabl is offline   Quick reply to this message.
Old 04-25-2006, 05:31 PM   #34
Claude Paradis
RCC Pro Contributor
Claude Paradis's Avatar
I am: Claude P.
Join Date: Sep 2002
Location: NorthEast BC
Radio of choice:
Futaba 7C and 9C
# of RCs: 20+

Feedback: 2 / 100%
Posts: 1,808
Total Props: 0
Originally Posted by JKovats
I would suggest that you email the MAAC Radio Spectrum Chair, Mark Betuzzi at mebetuzzi@shaw.ca and pose your question directly to him. MAAC tries to put professionals in these positions so we all get the correct answers to specific questions.

Tell Mark there is a thread on RCCanada that you started and ask him to respond to the thread. We all have our opinions and experience, but he is probably the guy with the right answer.

I think that is a wonderful idea. Why bang our heads together here trying to figure it out. Move it on to someone who has the resources to bring a correct and full answer back. Just to be a gent, I will send the email right now - even if someone already has.
Claude Paradis is offline   Quick reply to this message.
Old 04-25-2006, 06:28 PM   #35
Claude Paradis
RCC Pro Contributor
Claude Paradis's Avatar
I am: Claude P.
Join Date: Sep 2002
Location: NorthEast BC
Radio of choice:
Futaba 7C and 9C
# of RCs: 20+

Feedback: 2 / 100%
Posts: 1,808
Total Props: 0
OK so here you go. No definitive answer to be had in the immediate future.


Hi Claude:
I have been in discussion with Industry Canada, the radio Spectrum
committee, and the executive and board of MAAC on these ongoing issues. The board will be meeting soon and we will come to a decision.
Thank you,
Mark Betuzzi - MAAC - Radio Spectrum Chairperson

----- Original Message -----
From: <>
To: <>
Sent: Tuesday, April 25, 2006 3:49 PM
Subject: RC transmitter crystal change-outs

> Dear Mr Betuzzi,
> I am an active member of an online (internet) community where we discuss
> and share knowledge of all things radio control. Check it out at:
> www.rccanada.ca
> There is a discussion thread there currently ongoing regarding changing
> channels (crystals) in radio control transmitters. I invite you to review
> this thread on behalf of us members of MAAC and provide some accurate
> information. The internet link to the thread is:
> http://www.rccanada.ca/bb/viewtopic.php?t=23359
> The essence of the discussion, what people really want to know - is there
> any "current" legal or liability issues around changing a transmitter
> crystal. We change crystals in our receivers all the time. However,
> there seems to be conception that changing the crystal in a transmitter is
> a sticky point. Please provide some clarity for us and wherever you can
> quote a current regulation or rule or clause that supports your findings.
> We look forward to your reply
> Claude Paradis
> MAAC 59625
Claude Paradis is offline   Quick reply to this message.
Old 04-25-2006, 09:41 PM   #36
RCC Pro Contributor
luv2flyrc's Avatar
I am: Mike B.
Join Date: Jan 2003
Location: Mississauga, Ont.
Radio of choice:
Spektrum Dx-18G2, Jeti DS-16 Carbon Red

Feedback: 9 / 100%
Posts: 1,699
Total Props: 2
JR 783

I have a 783 and it has an RF module, if the other radio has a module you can swap them all you want.

luv2flyrc is offline   Quick reply to this message.
Old 04-28-2006, 07:22 AM   #37
ground pilot
RCC Apprentice
I am: Craig. W
Join Date: Jul 2005
Location: Earth

Feedback: 0 / 0%
Posts: 64
Total Props: 0
Originally Posted by can773
Originally Posted by JohnnyHotRocks
For Futaba RX, low band are the channels below 30, and high band are the channels above....not sure if channel 30 is low or high...I think it is high....

34 and lower (or 35) is low and the rest high....some Rx's from Futaba now come center tuned across the band so you can use anything.

Splitting the range in half and center tuning for each half (hence the low and high) just makes the tuning a little more accurate. Its a Futaba thing, JR doesnt do it to my knowledge and center tunes across the band.
Just to clarify, for Futaba channel 35 and under is low band, 36 and up is high band. Futaba is the only one doing this highband/lowband stuff.
ground pilot is offline   Quick reply to this message.
Old 04-28-2006, 09:23 AM   #38
RCC Junior Contributor
Join Date: Nov 2005

Feedback: 0 / 0%
Posts: 189
Total Props: 0
Here is a response I gt from Great Hobbies, which makes some sense.

Hello Jon.

In theory that will work, but I must warn you that the radios come from the manufacturer "tuned" for a certain frequency. When you change the crystals you are now messing with that tuning and there is a possibility of running into interference issues. Also Dept. communications says that it is against the law to change the crystal in your radio. In saying all of this lots of people have done this with no problem what so ever. Depending on what radio you have you may not be able to get TX crystals to make the change. Hope this helps you out a bit.

Thanks, Craig.
If God meant for man to fly...................He would have given us tickets.
sivle is offline   Quick reply to this message.
Closed Thread

Quick Reply

Register Now

In order to be able to post messages on the RCCanada - Canada Radio Controlled Hobby Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

Member names may only be composed of alpha-numeric characters. (A-Z and 0-9)

!!ATTENTION ADVERTISERS!! If you intend on advertising anything on this forum, whatsoever, you are required to first contact us here . Additionally, we do NOT allow BUSINESS NAMES unless you are an Authorized Vendor. If you own a business, and want to do sales on this site via posting or private message, you will need to follow the rules. Shops, Stores, Distributors, Group Buys without being authorized will see your account terminated.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Your Name
Your first name and last initial is required if you plan on using the forum.
Which city & province you live in. This is mandatory for classified listings.
Radio of choice?
Which radio is your current favorite to use?
Number of RC Vehicles?
How many boats, cars, planes do you own?


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
vBulletin Message

Thread Tools
Display Modes

Forum Jump

All times are GMT -5. The time now is 02:34 AM.

vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2016 DragonByte Technologies Ltd.