[PSUBS-MAILIST] STX-101 repackaging

Tue Jun 8 11:54:55 EDT 2021

Jon, I like your logic!

On Mon, Jun 7, 2021, 7:08 PM Jon Wallace via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> I don't, in fact, know that.  However, I will likely use headphones in the
> submarine and I do believe it is the STX-101 weather-proofed speaker that
> is responsible for the garbled audio.  I base that on the fact that topside
> I had a very difficult time understanding comms with STX-101 and too many
> times asked someone else "What did he say?"  When I dove R-300 and used
> headphones with the SSB-2010, comms was nearly perfect with easy to
> comprehend spoken word from topside.  That is at least anecdotal evidence
> that the STX-101 microphone was not the issue, nor the SSB-2010 headphone.
>
> Assuming the weather-proof speaker in STX-101 is in fact the problem, I
> can bypass it and use a better external speaker without any permanent
> modification to the electronics should I choose not to use headphones.  But
> there are other reasons for my choice, including the fact that the 101's
> have more power and should there be another 101 at the surface I hopefully
> will experience better comms/range simply based upon power alone.
>
> My recommendation to others is to use SSB_2010's in both submarine AND at
> the surface, both with the headphone attachment.  I'm was forced into a
> corner because I had already purchased the STX-101 before ever using it in
> the field.
>
> Jon
>
>
> On Monday, June 7, 2021, 06:48:39 PM EDT, Alan James via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>
> Good work Jon.
> But how do you know it is going to work better in the sub? And why would
> it?
> Alan
>
> On Tuesday, June 8, 2021, 10:23:52 AM GMT+12, Jon Wallace via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>
> I built a "thin-box" for the OTS STX-101 today.  I intend to reverse the
> roles of the STX-101 and the SSB-2010 having convinced myself that due to
> my previous experiences with the 101 topside (none of them good) it makes
> more sense to have the 101 inside the submarine.  The OTS STX-101 case,
> however, is very bulky at 6.5 inches in depth (165 mm ) and simply takes up
> too much real estate, primarily protruding too far within the cabin of a
> Kittredge sub when mounted on the ribs.  Additionally, the case cover
> raises only 90 degrees and is essentially non-removable which makes
> placement within the confines of a K-sub almost impossible.
>
> The STX-101 case is required to be bulky only because it is designed to
> carry two 6-vdc lantern batteries as power in the field, underneath the
> STX-101 panel.  These lantern batteries are unnecessary when powered by
> submarine main batteries and it turns out that the electronics for the
> STX-101 will fit easily into a box only 1.5 inches deep (39 mm).  This
> substantially reduces the real-estate required by the device and in fact
> allows it to sit recessed within the ribs of the submarine if installed
> vertically.  Even when mounted horizontally across two ribs the home-built
> case protrudes 75% less into the cabin than the stock STX-101 case.
>
> A separate carrying case can be purchased from Harbor Freight or similar
> outfit to protect the STX-101 in it's new housing.  As well, the STX-101
> electronics can be reinstalled into the original case at anytime since the
> "thin-box" requires no modifications to the electronics.
>
> I built the box out of 3/4 x 1.5 composite trim found at Home Depot.  The
> backing is a 1/4 inch plywood panel.  The box will be covered with multiple
> coats of paint to seal and protect the back panel.  Since all connections
> enter through the STX-101 front panel, there are no holes to drill or
> modifications to be made for power, mic, speaker, or transducer.
>
> Jon
>
>
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