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Offline Eugene52Topic starter
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« on: October 24, 2014, 06:27:52 pm »
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I found this file, I think from around 2009 or 2010 ??  

I think it is from a "Underwater VLF Circuit" running @12.5 Khz .  I am researching on this , but decided to post this schematic now for discussion .  Could it be a Viper Trident ??
This could be a really good "Winter Time" project for anyone that is interested !!  
If you recognize the schematic, Please comment !!!!  Thank-You

Best Regards ................Eugene

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12.5 Khz with notch control.zip


« Last Edit: October 24, 2014, 06:33:21 pm by Eugene52 »
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Offline xavier
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« Reply #1 on: October 25, 2014, 05:17:25 am »
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Never seen this schematic before Eugene so can't comment on it but thanks for posting it.

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So many questions so little time

Offline Eugene52Topic starter
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« Reply #2 on: October 25, 2014, 10:14:18 am »
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Quote:Posted by xavier
Never seen this schematic before Eugene so can't comment on it but thanks for posting it.


I saw it only once before several years ago .   Viper Trident or Huh??  
That's what I am looking for now , PCB photo's.  These are from a waterproof unit , but can be used on Land .  

It reminds me of Tesoro Tiger Shark without the Micro-Processor Huh?    They are still selling today @ $399.00 US Dollars as a different brand !! LOL

And they also came in another housing not a round tube , brown in color for the same price .
I am researching now .     But these may be very good in Salt Water too .  Why ?  Check out the seemingly different search coil specs , could very well be a salt-water design with the internal parts .
Other opinions are Welcome Here !!!!!!

Best Regards..................Eugene


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« Last Edit: October 25, 2014, 10:48:50 am by Eugene52 »
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« Reply #3 on: October 25, 2014, 12:11:34 pm »
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Without more info on that coil, it's boxnex.   I saved the file maybe can use some Ideas on the Phase Detection.

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