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Old Mar 19, 2012, 04:00 AM
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Joined May 2007
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What kind of radio equipments

Hi I am new in Submarine and wish to know what kind of transmitter I can or need to use.
I have been a RC person for quite some while but only in Cars, Sailboat, Fast electric boats and internal combustion engine boats but not submarine.

I wish to know what kind of radio I need to have before I DIVE into the submarine boat.
I understand I can only use AM module transmitter and receiver.

If I cant find any AM 27mhz, 75 mhz transmittal.receiver equipment.
(Non 2.4Ghz radios)

Can I use AM 72 or 40mhz transmittal or receivers ??
Please advice clearly so I can jump into this category !!
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Old Mar 19, 2012, 04:54 AM
Ilha Formosa-- TAIWAN
epg800's Avatar
Taiwan
Joined Apr 2010
104 Posts
FM system would be better
basically you need 4ch transmitter and receiver

best regards
Xin
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Old Mar 19, 2012, 04:54 AM
Ilha Formosa-- TAIWAN
epg800's Avatar
Taiwan
Joined Apr 2010
104 Posts
Quote:
Originally Posted by chilisoling50 View Post
Hi I am new in Submarine and wish to know what kind of transmitter I can or need to use.
I have been a RC person for quite some while but only in Cars, Sailboat, Fast electric boats and internal combustion engine boats but not submarine.

I wish to know what kind of radio I need to have before I DIVE into the submarine boat.
I understand I can only use AM module transmitter and receiver.

If I cant find any AM 27mhz, 75 mhz transmittal.receiver equipment.
(Non 2.4Ghz radios)

Can I use AM 72 or 40mhz transmittal or receivers ??
Please advice clearly so I can jump into this category !!
FM system would be better
basically you need 4ch transmitter and receiver

best regards
Xin
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Old Mar 19, 2012, 02:30 PM
Submarines, etc.
tsenecal's Avatar
Arvada, Colorado
Joined May 2005
1,603 Posts
Chili,

I cannot tell what country you are from, but the deal is this:

You must use the traditional ground frequencies in the MHz ranges (27, 35, 40, 75) for whatever country you are in. Here in the USA, that would be 27 or 75mhz.
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Old Mar 19, 2012, 04:00 PM
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Joined May 2007
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Thank you guys. Currently I a,m in Usa so I will use 27,35,40 and 75 mhz..
But when I return to Japan I will use 27, 40 only since Futaba dont have 75 mhz made for Japan.( Japan FTC rule )

I am doing this as a gift for my friend. who has a pool.

I am also having a hard time finding 3 or 4 ch reasonable price Tx/ and Rx.
Those I saw in China etc have them but not sure they re compatible with their receivers. ( I assume it is ok to use in Usa BUT it is not ok due to their strong signal and is violation of Japan FTC rule) But it looks like I dont have much choice but bite the bullet buy the more expensive Futaba Usa Tx/Rx)
Thanks again
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Old Mar 19, 2012, 04:50 PM
RC sub dude
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Montreal, Quebec, CANADA
Joined Nov 2004
301 Posts
Look for online shops that carry GWS FM systems, they're an affordable alternative and are compatible with most Futaba receivers/servos.
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Old Mar 19, 2012, 06:20 PM
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Joined Oct 2010
209 Posts
What about Graupner X-412 (40Mhz version)? 6 channel FM transmitter+receiver. I have one - great thing, quality product.
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Old Mar 19, 2012, 06:51 PM
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Joined Feb 2012
42 Posts
It is hit and miss, but look on ebay for a Hitec Lynx 3d. It is a 3 channel pistol grip radio that is frequency selectable. I just saw a auction for 4 receivers end at $20 bucks. With everyone switching to 2.4, older systems are selling dirt cheap.
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Old Mar 19, 2012, 08:36 PM
Michigan, USA
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Joined Apr 2008
70 Posts
[QUOTE=chilisoling50;21080465]Thank you guys. Currently I a,m in Usa so I will use 27,35,40 and 75 mhz..
But when I return to Japan I will use 27, 40 only since Futaba dont have 75 mhz made for Japan.( Japan FTC rule )/QUOTE]

Perhaps I have misunderstood your response but just so we're on the same page here - here being the USA.

The ONLY legal frequencies for a surface craft in the USA are 27MHz, 75MHz and 2.4GHz. The 50MHz band is also available to you but ONLY if you are a licensed (by the FCC) amateur radio operator.

Experience and theory has shown us the the 2.4GHz band does not work for submarines as the signal is greatly absorbed by the water. That leaves us with 27MHz and 75MHz. My own advice would be to purchase a 75 MHz FM 4-channel radio (more channels would be even better) using PPM encoding and be done with it. I say PPM and not PCM modulation as PPM seems to work better with the various fail safes you will probably want to install to (hopefully) bring your submarine back to the surface and to the shore when all else goes horribly wrong.

I'm not sure how 75MHz would work out legally in Japan.

Good luck,

Dan
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Old Mar 19, 2012, 09:45 PM
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Joined May 2007
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Dan: No, 75mhz is not popular there and it is not approved legally in Japan. Unless hitec or Futaba goes thru the trouble get it approved. Other wise 40 and 27 are the pn;y choice left.
The only T/X approved by J is my Hitec Aurora 2.4g 9 ch which was specifically approved by them
I will check on ebay and other places recommended by you folks.
Thank you.
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Old Mar 20, 2012, 12:49 AM
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Philippines
Joined Jan 2005
892 Posts
Look for a Futaba 4GWD, it's 4 ch, 27mhz. Got mine in the US for $129.
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