HI ALL
I have recently been trying transmitting Ariels under water for controlling the sub have designed Ariel for 27MHZ for going in the water a few days ago took all the kit down the canal as it seemed the ideal place to test it. The transmitting Ariel was under water unit i was using to receive signal was a modded CB radio decided to use this because radio had got signal strength meter and you could hear data being received through speaker i first walked away about 100FT and then put receiving Ariel in the water as well signal was end stopped on the signal meter kept walking away and got up to 500FT at this time Ariel was in the air again for RX unit as i walked under the canal bridge the signal dropped down quite a bit but what was interesting was when i put receiving Ariel back in the canal the signal went up to about S9 so for having to travel through 500FT of water it worked well i am not saying that it is perfect but it is a great improvement on what we use now under water, I'm quite sure it would have done 1000FT have got to do the same test with low frequency radio link as this is even better at getting through water as it is low frequency
All the best sub John
I have recently been trying transmitting Ariels under water for controlling the sub have designed Ariel for 27MHZ for going in the water a few days ago took all the kit down the canal as it seemed the ideal place to test it. The transmitting Ariel was under water unit i was using to receive signal was a modded CB radio decided to use this because radio had got signal strength meter and you could hear data being received through speaker i first walked away about 100FT and then put receiving Ariel in the water as well signal was end stopped on the signal meter kept walking away and got up to 500FT at this time Ariel was in the air again for RX unit as i walked under the canal bridge the signal dropped down quite a bit but what was interesting was when i put receiving Ariel back in the canal the signal went up to about S9 so for having to travel through 500FT of water it worked well i am not saying that it is perfect but it is a great improvement on what we use now under water, I'm quite sure it would have done 1000FT have got to do the same test with low frequency radio link as this is even better at getting through water as it is low frequency
All the best sub John
Yesterday at 11:02 am by stig58
» Cheap Arduino Auto leveler
Sat May 11, 2024 6:53 pm by 17b
» No reverse on Brushless ESC
Tue May 07, 2024 3:26 pm by geofrancis
» Peral Submarine of 1888
Mon May 06, 2024 11:16 am by david f
» Newbie needs advice!
Fri Apr 26, 2024 1:58 pm by david f
» Modulated electric fields for submarine communication in a "heads up" from Harry!
Sun Apr 21, 2024 6:09 am by geofrancis
» 868/915 Mhz as a viable frequency for submarines.
Wed Apr 10, 2024 5:48 am by tsenecal
» Laser cut Robbe U47 conversion
Tue Apr 09, 2024 3:40 pm by david f
» ExpressLRS - 868/915 Mhz equipment
Tue Apr 02, 2024 3:27 pm by tsenecal