[PSUBS-MAILIST] OTS Issue

Fri Oct 25 08:20:26 EDT 2013

Hi Alec,

Ok, at least i wasnt being a noddy.

So, this is what i did.

Plugged the batteries in and checked 12V at the output.  All ok.

At the back of the transducer socket, there are 3 wires coming out.  2 go
into 1 plug on the pcb and 1 goes into a seperate plug.  Lets call them A\B
for the pair and C for the single.

I could just get my meter on the exposed wires to check voltage.

WITHOUT the transducer plugged in, I was getting 12v accross A\B to C and
also continuity the same.

WITH the transducer plugged in i got nothing.  No voltage at all and no
continuity between A\B and C.

Next I manually connected pins 1 to 3 together in all configurations.
Nothing came on.

I have a horrible feeling its broken.

Next I am going to take the whole unit to my local tech dive shop.  The guy
has lots of OTS kit and will have a transducer thats not been hacked for me
top try.

regards
James

On 25 October 2013 13:09, Alec Smyth <alecsmyth at gmail.com> wrote:

> The OTS box does not know whether the transducer is in the water or not.
> What will turn it on is connecting the transducer cable. When you do so,
> you are closing the connection between contacts 1 and 3, and closing that
> circuit is the equivalent of clicking an "on" switch.
>
> Best,
>
> Alec
>
>
> On Fri, Oct 25, 2013 at 6:52 AM, James Frankland <
> jamesf at guernseysubmarine.com> wrote:
>
>> Hi Alec,
>>
>> Before i report my finding of last night, i think i might be being a
>> complete numpty.  I am assuming that the radio will come on even though the
>> transducer is not in the water?  Obviously no signal but i was assuming the
>> radio would at least crackle to life.  Does the transducer need to be
>> underwater before the radio will switch on??
>>
>> Thanks
>> James
>>
>>  On 24 October 2013 13:09, James Frankland <jamesf at guernseysubmarine.com>wrote:
>>
>>> Hi Alec,
>>>
>>> Ok, i think i get it.  I will investigate later and report back...!
>>> Many thanks.
>>> James
>>>
>>>  On 24 October 2013 12:56, Alec Smyth <alecsmyth at gmail.com> wrote:
>>>
>>>> Let me try and re-word this... You will find the cable has two
>>>> conductors, but the connector has three contacts. Two of the contacts are
>>>> connected to the same cable. Thus when you screw the connector onto the OTS
>>>> unit, it closes a circuit between the two contacts. Don't cut open the
>>>> connector, you can explore this just by checking continuity between the
>>>> contacts.
>>>>
>>>> Sorry, I hope I'm not repeating myself!
>>>>
>>>>
>>>> Alec
>>>>
>>>>
>>>> On Thu, Oct 24, 2013 at 6:42 AM, James Frankland <
>>>> jamesf at guernseysubmarine.com> wrote:
>>>>
>>>>> Im a bit confused as when i cut the cable (some distance from the
>>>>> connector), there are only 2 cables.  The inner cable and the shield.  So
>>>>> not sure where this 3rd cable is.  I will take the connector appart and
>>>>> investigate....
>>>>>
>>>>> Thanks
>>>>> james
>>>>>
>>>>>  On 24 October 2013 11:20, Alec Smyth <alecsmyth at gmail.com> wrote:
>>>>>
>>>>>> In the connector you screw onto the OTS box, just connect both 1 and
>>>>>> 3 to the same cable.
>>>>>>
>>>>>> Best,
>>>>>>
>>>>>> Alec
>>>>>>
>>>>>>
>>>>>> On Thu, Oct 24, 2013 at 5:02 AM, James Frankland <
>>>>>> jamesf at guernseysubmarine.com> wrote:
>>>>>>
>>>>>>> Hi Emile\Alec,
>>>>>>>
>>>>>>> Thanks for that info.  Not quite sure how i can connect pins 1 and
>>>>>>> 3, but i will have another look at it later on after work and see how it
>>>>>>> looks.
>>>>>>> Many thanks
>>>>>>> James
>>>>>>>
>>>>>>>  On 23 October 2013 18:14, Smyth, Alec <Alec.Smyth at covisint.com>wrote:
>>>>>>>
>>>>>>>>   Hi James,****
>>>>>>>>
>>>>>>>> ** **
>>>>>>>>
>>>>>>>> OTS have done something clever. The OTS transducer has only two
>>>>>>>> contacts, but the when you use the factory cable for mounting the
>>>>>>>> transducer remotely you will notice the cable connector has three contacts.
>>>>>>>> What they are doing is using two of them (#1 and #3) connected together to
>>>>>>>> act as a switch, so that when you plug in the cable the OTS box turns on. I
>>>>>>>> think if you keep your current arrangement, but also connect contacts 1 and
>>>>>>>> 3, you might find it works.****
>>>>>>>>
>>>>>>>> ** **
>>>>>>>>
>>>>>>>> Best,
>>>>>>>>
>>>>>>>> Alec****
>>>>>>>>
>>>>>>>> ** **
>>>>>>>>
>>>>>>>> *From:* Personal_Submersibles [mailto:
>>>>>>>> personal_submersibles-bounces at psubs.org] *On Behalf Of *Emile van
>>>>>>>> Essen
>>>>>>>> *Sent:* Wednesday, October 23, 2013 12:34 PM
>>>>>>>> *To:* 'Personal Submersibles General Discussion'
>>>>>>>> *Subject:* Re: [PSUBS-MAILIST] OTS Issue****
>>>>>>>>
>>>>>>>> ** **
>>>>>>>>
>>>>>>>> James,****
>>>>>>>>
>>>>>>>> ** **
>>>>>>>>
>>>>>>>> It usually gives no problem to cut a transducer cable and solder it
>>>>>>>> again. Don’t forget the shield.****
>>>>>>>>
>>>>>>>> Obvious, the transducer must be in water and may not be in the
>>>>>>>> shade of the sub.****
>>>>>>>>
>>>>>>>> ** **
>>>>>>>>
>>>>>>>> Got mine on top of the sail. Best place but works not on surface..*
>>>>>>>> ***
>>>>>>>>
>>>>>>>> ** **
>>>>>>>>
>>>>>>>> BTW; I am dealer of  Ocean Reef  UW Communication ;  This brand
>>>>>>>> share the same technology as OTS so you can talk between the 2 brands..)
>>>>>>>> ****
>>>>>>>>
>>>>>>>> ** **
>>>>>>>>
>>>>>>>> ** **
>>>>>>>>
>>>>>>>> Best regards, Emile****
>>>>>>>>
>>>>>>>> .****
>>>>>>>>
>>>>>>>> ** **
>>>>>>>>
>>>>>>>> ** **
>>>>>>>>
>>>>>>>> ** **
>>>>>>>>
>>>>>>>> ** **
>>>>>>>>  ------------------------------
>>>>>>>>
>>>>>>>> *Van:* Personal_Submersibles [
>>>>>>>> mailto:personal_submersibles-bounces at psubs.org<personal_submersibles-bounces at psubs.org>]
>>>>>>>> *Namens *James Frankland
>>>>>>>> *Verzonden:* woensdag 23 oktober 2013 18:05
>>>>>>>> *Aan:* personal_submersibles at psubs.org
>>>>>>>> *Onderwerp:* [PSUBS-MAILIST] OTS Issue****
>>>>>>>>
>>>>>>>> ** **
>>>>>>>>
>>>>>>>> Hi All,****
>>>>>>>>
>>>>>>>>  ****
>>>>>>>>
>>>>>>>> Anyone got any thoughts on this.****
>>>>>>>>
>>>>>>>>  ****
>>>>>>>>
>>>>>>>> My OTS surface station mounted inside the sub didnt work.  It didnt
>>>>>>>> even switch on.  I checked the Vout at the batteries (16x AAA inside the
>>>>>>>> unit) and it was good at 12V.****
>>>>>>>>
>>>>>>>>  ****
>>>>>>>>
>>>>>>>> I suspect the problem is that i cut the transducer cable to pass it
>>>>>>>> through a sub conn bulkhead connector.  When you plus the transducer into
>>>>>>>> the unit, that is supposed to turn it on at the same time, but nothing.
>>>>>>>> Suspect no signal from the transducer so unit not switching on.****
>>>>>>>>
>>>>>>>>  ****
>>>>>>>>
>>>>>>>> You can see the rubbish effort i made of it here.  Im almost sure
>>>>>>>> this is the fault.****
>>>>>>>>
>>>>>>>>  ****
>>>>>>>>
>>>>>>>> http://www.guernseysubmarine.com/Extended_files/Page22133.htm****
>>>>>>>>
>>>>>>>>  ****
>>>>>>>>
>>>>>>>> Anyone got any ideas?  I need to get this fixed before the nest
>>>>>>>> dive.****
>>>>>>>>
>>>>>>>>  ****
>>>>>>>>
>>>>>>>> Thanks****
>>>>>>>>
>>>>>>>> James****
>>>>>>>>
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>>>>>>>>
>>>>>>>
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>
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