Talbot
Active member
I'm also interested in this info, and perhaps organising a group buy for the transducers.
I am also interested in a group purchase of the whole system and would need 4 systems.
I'm also interested in this info, and perhaps organising a group buy for the transducers.
I am also interested in a group purchase of the whole system and would need 4 systems.
hm..bitman..can you list for me, the component of ultrasonic antifouling for boat, that you have show the picture?..
i really need it..your coopration is highly appreciated...
because i'm gonna doing this, for my final year project..
hope that you can really help me..
thanks you.!
Hi, did you manage to get a component listing for the Ultrasound project...
Due to a mix-up I now have 2 complete Jaycar Ultrasonic kits for sale: £100 each plus P&P if anyone is interested?
I can confirm that these kits are relatively simple to build as all the posts here confirm. Please PM me if you are interested.
Due to a mix-up I now have 2 complete Jaycar Ultrasonic kits for sale: £100 each plus P&P if anyone is interested?
I can confirm that these kits are relatively simple to build as all the posts here confirm. Please PM me if you are interested.
Are there not some 'long term test' results due around now?
There are several of us that have built the kits within the last 3 months mine is installed and running as I guess are others so no results will be available untill about October of this year as to their effectiveness. there will certainly be one used in the Eastern Med. mine on the UK East Coast and the others in different locations. I guess there will be different modes of use, mine this year will be on last years antifouling simply cleaned down others may choose to renew their antifoul.
The premiss that a couple of us have adopted is that at a couple of hundred pounds sterling if they work great! if they extend the effectiveness of current antifouling systems good! if they don't work well it was worth the punt and passed a couple of winter hours building the kits and argueing the point, £200 lost not the end of the world.
The Jaycar system claims a peak current consumption of 3 Amps and either 200 or 300 mA /Hr overall so say 8 amps per day per unit. To meet this I have installed a 50 Watt solar panel which with a total battery capacity of 360 A should allow several weeks continuous running before I have to resort to charging the batteries from shore power etc, I did not want to leave my batteries on permanant charge. There are obviously other methods of dealing with powering the systems some of which are discussed in this thread. The Jaycar system does have a low voltage cut off to avoid completly discharging your batteries. The system claims to operate on putting out a pulsed discrete but broad spectrum of ultrasound which it is claimed disrupt both the cell structure of algea and prevent its attatchment thus removing the primary link in the food chain hence no secondary growth of fouling barnacles etc. That seems to be the commonly accepted mode of opperation for all the systems in use and the original research done many years ago.
Hope that answers some of your questions.
Hi GaryThank You Much for the explanation, I am in San Diego, Ca. and have a power boat. I keep my boat 28' in what they call a bottom liner with no anti fouling paint, we use swimming pool chlorine to sanitize and keep the water from growing algea. ( www.armoredhull.com) if you want to see what a bottom line is. ) My liner is about to be replaced and that's why I was looking into this. I can buy ready made ultrasonic unit but they are very expensive. And no one really says that they work or not. I did talk to a rep from a company in Canada and he swears by them. but can not produce a data. Everyone in the United States say they are" Snake Oil" to good to be true and just another gimmick. But it sorta makes sense to me . I found this thread searching the Internet. and go a price from Jaycar which in US Dollars is 155.75 plus 40.00 for shipping to the united states. I guess Jaycar is in Australia.
Hope to hear back....
Gary
Just like all paint isn't the same, neither are all Ultrasonic Antifouling units
One variable that has a huge influence on antifoul effectiveness (IMHO) is the usage pattern for the boat.
If the boat is used regularly and covers big mileages, especially in any boisterous conditions that will effectively 'scrub' the hull, the antifoul will appear to be more effective than if the boat sits quietly on its mooring for most of the summer.
It is almost impossible to run a control experiment/trial on real boats for a system like US antifouling so any initial results will, at best, be somewhat subjective. Maybe, after a few years, a sufficient body of evidence will build up one way or the other, but, until then, the jury will be 'out'!
That said, I will be following the 'subjective results' with interest as I want to believe it's not snake oil.
A cheap and truly 'green' antifouling system will indeed be most welcome.
kHz surely?The unit I have built runs through 20 - 40 mhz and then stops.
The unit I have built runs through 20 - 40 Khz and then stops. Waits and then does it all over again.