[PSUBS-MAILIST] (no subject)

[Alan via Personal_Submersibles]

Hank, Sean.
I commented before on this that if you are hearing the signal clearly but
very quiet in the sub that it could be a problem with the amplification in the
sub's unit. 
With underwater coms do they become distorted or quiet or both at the edge
of their range? If distortion is a factor then it would indicate that the amplification
in the sub's unit is the problem.
Alan


> On 11/01/2019, at 8:07 AM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Sean,  now that mention that, I have a battery  powering the electric motor connected to the radio with a power converted that converts 12v to 24 v.  I just asked my wife if they were motoring while talking and they may have been.  That means there could have been a voltage drop to the radio.  Could that be the culprit?  
> Hank
> 
> On Thursday, January 10, 2019, 12:00:01 PM MST, Sean T. Stevenson via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> 
> I'm suspecting the available transmit power of the surface unit as the culprit here.
> 
> Sean
> 
> 
> 
> -------- Original Message --------
> On Jan 10, 2019, 11:46, hank pronk via Personal_Submersibles < personal_submersibles at psubs.org> wrote:
> 
> Sean, on 27 kHz the radio is crystal clear but at 225 feet, the surface radio can hear me clearly but in she sub it was very clear but super quiet.  I am assuming that I need to get onto the 10khz side for range.  Unfortunately Gamma came with the wrong paperwork for the come.  I ended up with Delta's paperwork and the radios are different.  The link you sent shows a very similar radio and it says 3km for the 27 kHz side, so this makes me wonder if I have a simple problem with my 27 kHz side.  
> I have no clue if it is strait frequency.  I can look in my paperwork to see if there is anything at all.
> Mine has a pinger also
> Hank
> 
> On Thursday, January 10, 2019, 10:11:27 AM MST, Sean T. Stevenson via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> 
> This would be the direct successor to your unit:
> 
> https://www.subsea-import.com/subphone-580---580tx.html
> 
> Sean
> 
> 
> 
> 
> -------- Original Message --------
> On Jan 10, 2019, 09:53, hank pronk via Personal_Submersibles < personal_submersibles at psubs.org> wrote:
> 
> Sean,
> I have a radio in the sub and a matching radio in the boat.  Yes it is 9khz  and probably very old school.
> Hank
> 
> On Thursday, January 10, 2019, 8:32:42 AM MST, Sean T. Stevenson via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> 
> A few questions:
> 
> 1) Who are you communicating with / what is the hardware on the receiving end?
> 
> 2) I presume you meant to type 9 kHz instead of 9 Hz? 9 Hz would be infrasonic and require an immense amount of power to transmit, in addition to not having sufficient bandwidth for voice comms. 9 kHz, on the other hand, still doesn't sound like a standard comms frequency. Human hearing covers 20 Hz - 20 kHz. 9 kHz would be audible, not ultrasonic. Active sonar transducer perhaps?
> 
> Sean
> 
> 
> -------- Original Message --------
> On Jan 9, 2019, 18:01, hank pronk via Personal_Submersibles < personal_submersibles at psubs.org> wrote:
> 
> Sean,
> I have no clue what the wattage is.  These are the original coms that came with Gamma, they are rack mount.  The picture shows a spare 27 and the big one is a 10 hs but I need 9 hz
> hank
> 
> ----- Forwarded Message -----
> From: hank pronk <hanker_20032000 at yahoo.ca>
> To: hank pronk <hanker_20032000 at yahoo.ca>
> Sent: Wednesday, January 9, 2019, 5:58:41 PM MST
> Subject:
> 
> 
> 
> 
> 
> Sent from my iPhone
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