HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old Nov 18, 2012, 09:25 PM
Registered User
Malibu Ca
Joined Feb 2000
739 Posts
Discussion
Best radio for a sub?

It seems 72MHz is not that good and 2.4 is even worse, what gives the best range for this application?
Eddy is offline Find More Posts by Eddy
Reply With Quote
Sign up now
to remove ads between posts
Old Nov 18, 2012, 09:36 PM
Registered User
California Desert... 7 miles from nearest town
Joined Jan 2010
367 Posts
72MHz is not good because it is reserved for aircraft.

75MHz is what most use here in the USA. Reserved for surface use.
Submarines are considered surface use.

2.4GHz does not work because the signal does not penetrate the water more than a few inches if at all. It's reflected.

The issue is that the 75MHz & 72MHz radios and receivers are being phased out here for the 2.4GHz. We can still get 75MHz receivers made in Canada. New transmitters are becoming harder to find.
Cliff Hanger is offline Find More Posts by Cliff Hanger
Reply With Quote
Old Nov 19, 2012, 12:52 AM
Shanghai'd Expat
herrmill's Avatar
Xiaoshan, China
Joined Jun 2006
4,581 Posts
WFly still makes them & you'll find several in the States selling with Sub Driver offering the best price. I have one & can recommend the brand.

http://www.sub-driver.com/electronic...receivers.html
http://www.nacrc.com/wfly-wft08s-24g...ion-p-787.html

Here's a link to the WFT08 manual:

http://www.moonrakers.com/submarines/WFT08manual.pdf
herrmill is offline Find More Posts by herrmill
Reply With Quote
Old Nov 19, 2012, 08:01 AM
Registered User
Mesa Falcon Fld, Arizona, United States
Joined Sep 2004
426 Posts
I use an old Futaba 8u. The great thing about it was that it was cheap because it was "old" technology, and it allows the usage of rf modules. This allows the entire rf section to be removed and replaced with 72MHz, 75MHz, or your favorite 2.4GHz flavor.

On a side note, it is sad to me that so many of these radios cost so much. There really is not all that much that goes into them. The programming is not terribly complicated. I know that there are some open source efforts out there as well.

Adam
Aeroengineer1 is offline Find More Posts by Aeroengineer1
Reply With Quote
Old Nov 19, 2012, 08:34 AM
Registered User
Joined Sep 2004
379 Posts
At one time I used an AM Futaba that worked great but I sold it with the sub. Currently use a HiTec.
Carcharadon is offline Find More Posts by Carcharadon
Reply With Quote
Old Nov 19, 2012, 09:35 AM
Registered User
Malibu Ca
Joined Feb 2000
739 Posts
what is the best range you guys get on your radios with depth and distance?
Eddy is offline Find More Posts by Eddy
Last edited by Eddy; Nov 19, 2012 at 01:14 PM.
Reply With Quote
Old Nov 19, 2012, 12:57 PM
Registered User
Joined Sep 2004
379 Posts
30ft (or more) in depth and to where I can't see it. (see end)

Disney Nautilus RC Submarine (2 min 14 sec)
Carcharadon is offline Find More Posts by Carcharadon
Reply With Quote
Old Nov 22, 2012, 10:31 AM
Registered User
United States, NJ, Frenchtown
Joined Mar 2003
9,073 Posts
Once it fully submerges, there is only danger in running deeper.
cyclops2 is offline Find More Posts by cyclops2
Reply With Quote
Old Nov 23, 2012, 06:28 PM
"Unnecessary Necessity"
coriolan's Avatar
Canada, BC, Vancouver
Joined Sep 2006
5,759 Posts
Quote:
Originally Posted by Cliff Hanger View Post
72MHz is not good because it is reserved for aircraft.

75MHz is what most use here in the USA. Reserved for surface use.
Submarines are considered surface use.

2.4GHz does not work because the signal does not penetrate the water more than a few inches if at all. It's reflected.

The issue is that the 75MHz & 72MHz radios and receivers are being phased out here for the 2.4GHz. We can still get 75MHz receivers made in Canada. New transmitters are becoming harder to find.
The SombraLabs SL-8 can be programmed to any 75 Mhz channel(as well as 72), as for the Tx you can use a Futaba/Hitec module based model like Futaba 9C or Hitec Eclipse-7 with a 75 Mhz surface module(still available as new or used):
http://www.sombralabs.com/store/prod...roductid=16143
There is two SL-7 for sale right now in the W/FS forum:
http://www.rcgroups.com/forums/showthread.php?t=1772577
coriolan is offline Find More Posts by coriolan
Last edited by coriolan; Nov 23, 2012 at 06:39 PM. Reason: add link
Reply With Quote
Old Nov 23, 2012, 10:39 PM
Registered User
Joined Aug 2012
5 Posts
what about 35 mhz
philong2005 is offline Find More Posts by philong2005
Reply With Quote
Old Nov 30, 2012, 04:28 PM
Registered User
Joined Feb 2005
9 Posts
Quote:
Originally Posted by philong2005 View Post
what about 35 mhz
No problems! I have a 40 mHz (MPX MC 3030) wthout any problems.

Christophe
cbk21 is offline Find More Posts by cbk21
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion Best Radio Tx Rx for S800? Volandos Multirotor Talk 2 Feb 19, 2013 04:24 PM
Discussion What is the best radio system for professional use Videographia.it Radios 12 Aug 06, 2012 02:24 PM
Question What is the best Radio to use for FPV? easystarfpv4 FPV Talk 12 Apr 27, 2012 09:06 AM
Question best radio for around 400 bucks VENOMiTry Electric Plane Talk 21 Mar 31, 2012 12:38 AM
Discussion Dare I?: Best sub $500 radio? Grips Multirotor Talk 43 Sep 28, 2011 12:58 PM