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 Gday David, 
It would be great if it was possible to get 
instructions,circuit diagrams,component list and circuit board details or 
anything you have . 
I have been thinking about building a hydrophone for some 
time now and this would be a good start. 
Thanks and hoping to hear from you. 
Regards, Clive Wood. I can let you have my email if that 
is more convenient. 
  ----- Original Message -----  
  
  
  Sent: Saturday, August 30, 2008 9:14 
  AM 
  Subject: [PSUBS-MAILIST] 
Hydrophones 
  
  Frank,      I will in the weeks ahead produce 
  the single hydrophone intended for installation aboard your boat. This is 
  being done so that you could mount this device early with the use of the 
  proper thru-hull fitting. It can be placed within a ballast tank and will hear 
  thru this as long as water is present on both sides. This will not create 
  additional drag if installed in this or likewise manner. I will set up a small 
  process whereby many can be produced at the same 
  time...So....     Does anyone else want a preproduced 
  hydrophone for installation aboard other submarines or for perhaps testing? 
  Perhaps the how-to-instructions so that you could build your 
  own?     I used an all electronics preamp kit and all 
  electronics 7watt amplifier kit and these worked great together allthough 
  other electronics could provide equally good results. Go to allelectronics.com 
  for ordering info. The preamp was less than $10.00 with the 7watt amplifier 
  close to $15.00. All that is left is a small 12vdc battery and a small project 
  box to fit it all in withy the panel controls and on/off 
  switch.     If you want to take this plunge, here is a great 
  chance to dive 
  in.                                                                                          
  David Bartsch
  
   
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