Banner Ad 1

Hitec Radio

Place for general submarine conversation

Re: Hitec Radio

Postby JWLaRue » Sat Jun 16, 2012 12:28 pm

BD's advice to stick with the same brand (and even specific model) is very good advice. It's something that I too have done and it definitely has made my life easier.

re: using same servo brand as the transmitter - this isn't absolutely necessary, but I understand the intent. The reason I say this is that you may not want to limit the sizes of servos that you can choose from.

-Jeff
Rohr 1.....Los!
User avatar
JWLaRue
SubCommittee Member
 
Posts: 3892
Joined: Wed Aug 31, 1994 6:00 pm
Location: Annapolis, MD

Re: Hitec Radio

Postby Giovanni » Sat Jun 16, 2012 7:24 pm

Kind regards,
Giovanni

Alexander Engel 1/48th scale Gato
Graupner MC-19 radio converted to 75MHZ

"Anything one man can imagine, other men can make real." — Jules Verne
User avatar
Giovanni
SubCommittee Member
 
Posts: 212
Joined: Sat Mar 10, 2012 2:03 am
Location: Alameda, California

Re: Hitec Radio

Postby Alexander The Great » Sun Jun 17, 2012 1:04 am

Giovanni
Thanks for the link, I don't know what's up with the internet these days.

I'll check my options out, and as BD said, marine programming can (may) be a pain in the butt. I can live with airplane/heli/glider etc programming. Life's like that, right?


The thing is if I buy a aircraft transmitter and receiver, what type of programming/software should it have? By that I mean airplane, heli, glider, and sailplane programming/software. Which one is best suited for submarine use? I am MOST likely to get a radio set tuned to an aircraft frequency. The surface frequencies are sooooooooooooo limited.

Thoughts please.
The job ain't done when you are on the couch watching football 2 hours early.
User avatar
Alexander The Great
Registered User
 
Posts: 50
Joined: Fri May 18, 2012 11:11 pm

Re: Hitec Radio

Postby JWLaRue » Sun Jun 17, 2012 1:21 am

For all practical purposes the programming capabilities for any air/heli radio will be the same.

As for getting and using an air radio because of the limit to the number of surface channels.....don't. You will be in violation of FCC regulations. It will be highly unlikely that you will ever run your sub with enough other folks to run out of channels. Having a synth'd radio virtually guarantees that.

I would also offer the observation that it's possible to over-think the whole decision process of which radio to get. Once you decide how many channels you want/need....buy something. :)

-Jeff
Rohr 1.....Los!
User avatar
JWLaRue
SubCommittee Member
 
Posts: 3892
Joined: Wed Aug 31, 1994 6:00 pm
Location: Annapolis, MD

Re: Hitec Radio

Postby Sub culture » Sun Jun 17, 2012 6:02 am

The main areas that are useful on a computer transmitter in respect of subs are-

1. Trim setting storage.
2. Servo travel limit adjustment including servo reversing.
3. Exponential control settings (most subs don't need this, but it's handy to have all the same)

That really is it, and really just about all computer TX's have those facilities. To be honest a bog standard analogue 4-6 channel set is adequate for 95% of model submarines. Go for 8-channels if the model has fore and aft control planes and a complex ballast system.

Any mixing is usually done onboard the model itself, not in the transmitter, although there are one or two exceptions to this.
'Why are you staring at an empty pond?'

Want to dive your boat in crystal clear water? Then you had better Dive-in- http://www.diveintomodelsubmarines.co.uk
User avatar
Sub culture
SubCommittee Member
 
Posts: 2890
Joined: Fri Feb 21, 2003 6:55 am
Location: London, UK

Re: Hitec Radio

Postby Alexander The Great » Sun Jun 17, 2012 10:43 am

Jeff,

Do you really think I would violate FCC regulations? Of course not! 'I'm too young to screw up my life right now'. If I buy a aircraft frequency I will send it to Radio South for them to retune the frequency from 72 to 75 MHz.

I really don't care wether the radio is synthesized or uses crystals, since no one ever operates a R/C boat or anything else of any kind there at the lake for some reason.

I need 8 channels minimum.
Here is the arrangement of each channel.
1. Rudder
2. Stern planes
3. Bow planes
4. K5 ( for main operation of ballast system)
5. K6 ( for bow/aft heavy trimming)
6. K7 (for fine-trimming of the boat
7. Propeller 1
8. Propeller 2

Note: the configuration of this may vary, as it depends on the model. I probably won't need two channels for the propellers. As for the ballast system I may only use two, not three, channels.
The job ain't done when you are on the couch watching football 2 hours early.
User avatar
Alexander The Great
Registered User
 
Posts: 50
Joined: Fri May 18, 2012 11:11 pm

Re: Hitec Radio

Postby JWLaRue » Sun Jun 17, 2012 10:49 am

Re: I am MOST likely to get a radio set tuned to an aircraft frequency. The surface frequencies are sooooooooooooo limited.

I took this to mean that you had decided to run an air frequency....if that is not what you meant, than please ignore my comment.

-Jeff
Rohr 1.....Los!
User avatar
JWLaRue
SubCommittee Member
 
Posts: 3892
Joined: Wed Aug 31, 1994 6:00 pm
Location: Annapolis, MD

Re: Hitec Radio

Postby Larry Kuntz » Sun Jun 17, 2012 1:27 pm

Jeff,
Would it be legal to use 72MHz if your operating a flying sub model? :wink: :wink: :wink:
Just kidding, I know better. :D :D
Larry Kuntz
SubRon8
ImageImage
User avatar
Larry Kuntz
SubCommittee Member
 
Posts: 366
Joined: Fri Feb 21, 2003 9:44 pm
Location: Churchville, NY USA

Re: Hitec Radio

Postby JWLaRue » Sun Jun 17, 2012 1:38 pm

hmmm.....if it's actually flying....? Would make for an interesting dilemma! :mrgreen:

-Jeff
Rohr 1.....Los!
User avatar
JWLaRue
SubCommittee Member
 
Posts: 3892
Joined: Wed Aug 31, 1994 6:00 pm
Location: Annapolis, MD

Re: Hitec Radio

Postby Bigdave » Sun Jun 17, 2012 2:16 pm

I can make my Sushi and Delphin fly so you may have found a loophole Larry. :mrgreen:
BTW- Those lime-a-ritas are awesome! :) :lol: :wink: BD.
David Welch
Commodore SR-8

Image


"Eat your pudding Mr Land". "I ain't sure it's puddin" James Mason-Kirk
Douglas, 20K
User avatar
Bigdave
SubCommittee Member
 
Posts: 2867
Joined: Fri Feb 21, 2003 8:33 am
Location: Rochester NY

Re: Hitec Radio

Postby Giovanni » Sun Jun 17, 2012 8:25 pm

Norbert Bruggen's newest submarine model looks as if it could fly! :mrgreen:
I'm considering building one similar to this in 260 brass sheet.
http://www.scalesub.com/viewtopic.php?f=109&t=82
Kind regards,
Giovanni

Alexander Engel 1/48th scale Gato
Graupner MC-19 radio converted to 75MHZ

"Anything one man can imagine, other men can make real." — Jules Verne
User avatar
Giovanni
SubCommittee Member
 
Posts: 212
Joined: Sat Mar 10, 2012 2:03 am
Location: Alameda, California

Re: Hitec Radio

Postby Alexander The Great » Sun Jun 17, 2012 11:24 pm

Ok, we are WAY off topic. :D

Didn't I write "Ok, I just need a simple answer to this question" on the very first posting? :) The VERY first, even the very first sentence. :? What's gone on here? :wink:

Whatever :mrgreen:

Alex
The job ain't done when you are on the couch watching football 2 hours early.
User avatar
Alexander The Great
Registered User
 
Posts: 50
Joined: Fri May 18, 2012 11:11 pm

Re: Hitec Radio

Postby Alexander The Great » Sun Jun 17, 2012 11:30 pm

Oh yeah, I forgot to mention something.

The radio I mentioned on the very first post is one I believe is suitable my the Gato, since Engel's electronics do not work well with PCM modulation, and since the radio I said is FM/PPM modulation, it won't dysfunction the electronics.
The job ain't done when you are on the couch watching football 2 hours early.
User avatar
Alexander The Great
Registered User
 
Posts: 50
Joined: Fri May 18, 2012 11:11 pm

Re: Hitec Radio

Postby Alexander The Great » Sun Jun 17, 2012 11:35 pm

Oh my god, I keep forgetting things! (I am not posting like this on purpose, my brain forgets to think before clicking the submit button).

I think that radios like the Futaba 9 CAP are PCM/PPM modulated, and if you pick PPM, you lose one channel. Short story, you get 9 channels on PCM, but only 8 on PPM. Is this right?

Also, is there a way to convert a PCM transmitter and receiver to PPM if it is just a PCM only modulation?
The job ain't done when you are on the couch watching football 2 hours early.
User avatar
Alexander The Great
Registered User
 
Posts: 50
Joined: Fri May 18, 2012 11:11 pm

Previous

Return to General

Who is online

Users browsing this forum: No registered users