The Forum.

HI Richard
Sorry for not getting back and replying sooner i have been suffering with my jaw after having another tooth out and another infection in it i could pull the lot out my self can not believe how painfull it has been. You said about doing some basic circuits to go in to model subs will have a good think about it and see what i can come up with. I know you said that you find it interesting but hard to under stand but i suppose it's hard when you get in to RF electronics as this is a hole different area of electronics and it can get complicated very quick so i will try to keep it simple, what i will have to do in the electronics section where i post i will put some pictures up of a LMB unit which is used for receiving satellite TV signals on 10 GHZ, and what i have done is took the LMB apart cut the board in certain areas to make separate circuits for example cut one piece out which will be inverter section and bias control for the fets when the board has been cut up in to certain blocks of circuits the board is all put back together to form a 10 GHZ transmitter which will knock out about 100MW of RF, as this frequency you can send out BBC TV picture quality send out multiple sub carriers which can contain digital data, can be used on sub when on the surface of the water at this frequency antenna length would only be 6MM long so it could be hidden any where on the conning tower area and would not be seen. trouble is at this frequency you have to be very carefull as it is not a good idea to be close to a antenna at that frequency even knocking out 100MW .But i will just post these pictures up Just to give you a idea what can be done with RF and a little no how
Sub John

Hi John,
Good luck with your ilness.
I very much enjoy your electronics and frequencies comments.
When can we see new photos and videos of your sub ?

Regards,
Giovanni

Hi Richard and all,

I will go the photobucket route and let you know how it goes.

David

HI Giovanni
Nice to hear you enjoy the electronic posts on the forum, you asked about when will you see some photos and videos of the sub a friend of mine came around to night and asked the same thing. But with the problem i have had with my teeth it has had to be put on hold taking the sub out again this year as it has turned very cold to take the sub out, one of the problems is there is still some final trimming to be done and when it turns cold like it is hear it's no fun having your hands in cold water, but my friends still won't to take it out i am keen my self to put some videos on you tube
All the best Sub John

Are there any indoor pools that are large enough to launch your sub ?
Here in America, we have very large indoor YMCA swimming pools.
Regards,
Giovanni
P.S.
I am having a 3-D CAD drawing made of my Infinity-54 sailboat winch and would like to upgrade from a brushed to a brushless motor. Here is the brushed motor controller. It is using a 5K potentiometer feedback input for the double arm that pulls in the sheets ( strings ).

http://www.pololu.com/catalog/product/1392

I think it is more difficult here because:

- With our climate there are fewer private outdoor pools.
- Most indoor pools are publicly owned and so they have to be open to the public and we can't (for safety and decency reasons) mix the swimming general public and model submarines.

Having said that we have arranged occasional special pool sessions as one-off events.

David