[PSUBS-MAILIST] Adding an OTS surface unit inside sub

Wed Nov 11 21:18:04 EST 2020

Irox, I hooked up my topside unit with the transducer and sure enough the
channels 5-8 beep at you so my unit is a 4 channel 5w base.
David

On Wed, Nov 11, 2020, 8:52 AM irox via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

>
> For 8 channel units, there is a option for a second transducer tuned for
> 25KHz:
>
> https://www.oceantechnologysystems.com/store/military/transducer-assemblies-mil/ta-4-transducer-assembly/
>
> I guess you need to pick which transducer you'll dive with depending on
> which channels you're going to use.
>
>
> -----Original Message-----
> From: "Sean T. Stevenson via Personal_Submersibles"
> Sent: Nov 11, 2020 6:28 AM
> To: personal_submersibles at psubs.org
> Subject: Re: [PSUBS-MAILIST] Adding an OTS surface unit inside sub
>
> The additional channels would require some additional tuning circuitry /
> DSP on the board.
>
> Power will be a function of the amplifier circuitry. Easily doubled with a
> bigger amplifier, but at the expense of power consumption. Is the M version
> still rated as having the same battery life?
>
> The transducer is a ceramic ring with a resonant frequency close to the
> transmission carrier frequency, but it will be a tradeoff in efficiency as
> you move away from the optimal frequency. A transducer that has to cover
> down to 25 kHz I would expect to be somewhat larger than one that only
> needs to extend down to 31.25 kHz. I may be mistaken, but I think the four
> channel units are optimized for channels 1/2 and are less efficient at
> 31.25 kHz. The eight channel units I might expect to be optimized for
> somewhere in the middle (29?).
>
> Sean
>
> -------- Original Message --------
> On Nov. 10, 2020, 17:49, David Colombo via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
>
> Sean,
> On the STX101 M version which is the same unit as the STX101, it has 10
> watt capability and channels 5-8 extra. Otherwise it looks the same as the
> STX101 unit. Any thoughts as to how they doubled the output power with the
> same battery source. It looks like the transducer is shaped slightly
> different as well.
>
> Best Regards,
> David Colombo
>
> 804 College Ave
> Santa Rosa, CA. 95404
> (707) 536-1424
> www.SeaQuestor.com
>
>
>
> On Tue, Nov 10, 2020 at 12:12 PM Sean T. Stevenson via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>> Channels lists for several OTS units below.  Channel 1 is the standard
>> sport channel, and Channel 7 is the standard military channel.
>>
>> Sean
>>
>>
>> Buddy Phone D2:
>>      Ch.1 32.768 kHz USB
>>      Ch.4 31.250 kHz LSB
>>
>> RX-100-D2:
>>      Ch.1 32.768 kHz USB
>>      Ch.4 31.250 kHz LSB
>>
>> SP-100D-2
>>      Ch.1 32.768 kHz USB
>>      Ch.4 31.250 kHz LSB
>>
>> SSB-2010:
>>      Ch 1: 32.768 kHz USB
>>      Ch 2: 32.768 kHz LSB
>>      Ch 3: 31.250 kHz USB
>>      Ch 4: 31.250 kHz LSB
>>
>> SSB-1001B:
>>      Ch 1: 32.768 kHz USB
>>      Ch 2: 32.768 kHz LSB
>>      Ch 3: 31.250 kHz USB
>>      Ch 4: 31.250 kHz LSB
>>      Ch 5: 28.500 kHz USB
>>      Ch 6: 28.500 kHz LSB
>>      Ch 7: 25.000 kHz USB
>>      Ch 8: 25.000 kHz LSB
>>
>> STX-101:
>>      Ch 1: 32.768 kHz USB
>>      Ch 2: 32.768 kHz LSB
>>      Ch 3: 31.250 kHz USB
>>      Ch 4: 31.250 kHz LSB
>>
>> Bell-200:
>>      Ch 7: 25.000 kHz USB
>>
>>
>>
>> STX-101SB:
>>      8.0875 kHz USB
>>      Ch 7: 25.000 kHz USB
>>
>> STX-101SBR:
>>      8.0875 kHz USB
>>      11.000 kHz LSB
>>      or
>>      Ch 1: 32.768 kHz USB
>>      Ch 7: 25.000 kHz USB
>>
>> MAG 1003D:
>>      Ch 6: 28.500 kHz LSB
>>      Ch 1: 32.768 kHz USB
>>
>> STX-101M:
>>      Ch 1: 32.768 kHz USB
>>      Ch 2: 32.768 kHz LSB
>>      Ch 3: 31.250 kHz USB
>>      Ch 4: 31.250 kHz LSB
>>      Ch 5: 28.500 kHz USB
>>      Ch 6: 28.500 kHz LSB
>>      Ch 7: 25.000 kHz USB
>>      Ch 8: 25.000 kHz LSB
>>
>>
>> ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
>> On Tuesday, November 10, 2020 12:29 PM, Brian Hughes via
>> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>
>> For the Psubs crowd the standard is 32.768 kHz, that's channel 1 or the
>> "sport channel" on OTS systems. Ocean Reef uses the same frequency as did
>> Soniwave before they went out of business. Nearly all of the Aquacom
>> systems will have that one, except for the military versions.  All of my
>> gear is discontinued, but it works well and was way cheaper than new.
>>
>> Helle and Scubaphone (Orcatron) use 27 kHz, at least that's the standard
>> for them as I understand it. I have two Scubaphone surface units gathering
>> dust as I was going to install them, but learned PSubs uses OTS channel 1.
>> That way all our subs can talk to each other. Cliff has the pinout
>> designation on the PSubs site.
>>
>> Brian
>>
>>
>>
>> GetOutlook for Android <https://aka.ms/ghei36>
>>
>>
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