Model Boat Mayhem

Mess Deck: General Section => Beginners start here...! => Topic started by: apennicardwood1 on August 10, 2012, 05:38:30 pm

Title: Transmitter frequencies??
Post by: apennicardwood1 on August 10, 2012, 05:38:30 pm
Can anyone tell me why it is that 35mhz is only for aircraft's and can i put a 40mhz crystal in my transmitter that i got with my heli?
Title: Re: Transmitter frequencies??
Post by: dodgy geezer on August 10, 2012, 06:04:20 pm
Do not do this. Transmitters are designed for a specific set of frequencies.

See here for allocated frequencies for the UK. http://www.ukrcc.org/ (http://www.ukrcc.org/)
Title: Re: Transmitter frequencies??
Post by: apennicardwood1 on August 10, 2012, 06:21:55 pm
ok thanks, then i need  new radio gear any ideas on a good cheep one?
Title: Re: Transmitter frequencies??
Post by: Martin (Admin) on August 10, 2012, 06:43:48 pm
 
Planet 5 - http://howesmodels.co.uk/RadioControl/viewProducts.php?SubCatID=237 (http://howesmodels.co.uk/RadioControl/viewProducts.php?SubCatID=237)

T4U Link / RadioLink - http://www.giantshark.co.uk/gianitcod-24ghz-4channel-mode2-transmitter-p-403779.html (http://www.giantshark.co.uk/gianitcod-24ghz-4channel-mode2-transmitter-p-403779.html)

Both extensively reviewed here on Mayhem

Title: Re: Transmitter frequencies??
Post by: catengineman on August 10, 2012, 07:06:45 pm
How come one of my heli's has a 40MHz transmitter and the built in rec has a 40MHz Xtail ?
this is as was nd is from a UK shop.  %%
Title: Re: Transmitter frequencies??
Post by: john s 2 on August 10, 2012, 07:30:19 pm
If this is the case. Then you should return it to the model shop for the rc equip to be changed. As strickly speaking you are breaking the law by using it.John.
Title: Re: Transmitter frequencies??
Post by: CF-FZG on August 10, 2012, 07:43:34 pm
If this is the case. Then you should return it to the model shop for the rc equip to be changed. As strickly speaking you are breaking the law by using it.John.

to assist in your efforts in getting things put right - I'd advise the shop concerned that he is also breaking the law :police:

It's idiotic shopkeepers like this that are completely irresponsible and should be reported to the authorities, and if required shut down <*<


Mark.
Title: Re: Transmitter frequencies??
Post by: scoop on August 10, 2012, 09:06:27 pm
to assist in your efforts in getting things put right - I'd advise the shop concerned that he is also breaking the law :police:

It's idiotic shopkeepers like this that are completely irresponsible and should be reported to the authorities, and if required shut down <*<


Mark.
It could be that the shop owner has imported the product, in which case he/she should be checking the stock when it arrives for conformity to our laws. Don't buy any R/C gear unless it has the CE mark on it.
Title: Re: Transmitter frequencies??
Post by: CF-FZG on August 10, 2012, 10:20:11 pm
It could be that the shop owner has imported the product, in which case he/she should be checking the stock when it arrives for conformity to our laws. Don't buy any R/C gear unless it has the CE mark on it.

If the shopkeeper has imported it, then his responsibilities are even greater when it comes to selling the product on to someone else. 

However, there's nothing illegal about importing these helicopters providing they have the required CE markings and a DofC.  It is, however, illegal to sell them for use in this country as they don't meet the laws of this country - i.e. the radio frequency regs, but they could meet the radio frequency regs of another country.
Title: Re: Transmitter frequencies??
Post by: Subculture on August 10, 2012, 10:38:52 pm
40mhz is legal for air use in many european countries, but not here in the UK. You could possibly use it however for your boat. I say possibly , because some manufacturers make radio equipment that fails to conform to the normal PPM standard.

Personally unless you want to get into subs, I wouldn't use anything other than 2.4 ghz equipment. No worrying about frequency clashes, efficient transmitters, largely immune to interference from motors etc.
Title: Re: Transmitter frequencies??
Post by: CF-FZG on August 10, 2012, 11:13:15 pm
I've got a 40/41MHz RF module in one of my Txs from when I lived in France, however I can use it over here for ground use as long as I only use a UK ground frequency, (a choice of three {:-{)

While several European countries did/do allow the odd 1 or 2 channels on 40MHz for flying it was only the very brave that would use them, everyone else used 35MHz, (the European RC flying frequency) or moved over to 2.4GHz.

France was the only country you couldn't use 35MHz in and had to use 40/41MHz for air use, although many flying clubs allowed the use of 35MHz by expats, (and 75MHz too %)), before the FFAM started getting it's fingers on the re-allocated 35MHz channels, (when I left at the end of 2009, they still only had 2 legal channels on 35MHz, but I believe they have a few more now, although most flyers were moving over to 2.4GHz when I left.


Mark.
Title: Re: Transmitter frequencies??
Post by: Neil Martin on September 18, 2012, 09:47:41 pm
A cheaper alternative to buying a new radio gear would be to look into getting a "2.4Ghz Conversion kit".
I believe these are still available for around £10-£15 & work on most 27, 35 or 40Mhz transmitters.
I know some of my fellow club members have used them with great success.
There are also a number of YouTube type videos to help you do the installation.
Title: Re: Transmitter frequencies??
Post by: dodgy geezer on September 18, 2012, 11:57:13 pm
A cheaper alternative to buying a new radio gear would be to look into getting a "2.4Ghz Conversion kit".
I believe these are still available for around £10-£15 & work on most 27, 35 or 40Mhz transmitters.
I know some of my fellow club members have used them with great success.
There are also a number of YouTube type videos to help you do the installation.

Not a lot cheaper. You would still have to buy a 2.4Ghz receiver for around £10. And you can buy a complete set of new 2.4 Ghz gear - Tx and Rx - for a similar price:

  for £25.20 this combo   http://www.giantshark.co.uk/flysky-4channel-transmitter-p-406151.html (http://www.giantshark.co.uk/flysky-4channel-transmitter-p-406151.html) 
  or for £26.31, this one  http://www.giantshark.co.uk/giantcod-24ghz-4channel-mode2-transmitter-p-403779.html (http://www.giantshark.co.uk/giantcod-24ghz-4channel-mode2-transmitter-p-403779.html)
Title: Re: Transmitter frequencies??
Post by: essex2visuvesi on September 19, 2012, 07:37:56 am
The 2.4 conversion is good value if you have a High Quality FM transmitter
Title: Re: Transmitter frequencies??
Post by: dodgy geezer on September 19, 2012, 10:56:50 am
Yup - it lets you keep a favourite Tx.

But simply addressing price, the cheapest I could find on GS was £24.50. And that assumes you have the correct Tx to fit the cheapest. That's not a lot cheaper than £25.20 - but I suppose that it IS 70p cheaper, and that was what was claimed....   :-X
Title: Re: Transmitter frequencies??
Post by: philk on September 19, 2012, 11:52:11 pm
Yup - it lets you keep a favourite Tx.

But simply addressing price, the cheapest I could find on GS was £24.50. And that assumes you have the correct Tx to fit the cheapest. That's not a lot cheaper than £25.20 - but I suppose that it IS 70p cheaper, and that was what was claimed....   :-X

giantshark hack module is £13.78

phil
Title: Re: Transmitter frequencies??
Post by: dodgy geezer on September 20, 2012, 09:20:14 am
That was counting in a matching receiver. I assume that you need one of those - and it's what you get with a combo...