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<div>Al, now I am wondering if my transducers are not matched. My support person in the boat can hear me perfectly so far to 225 feet but I can not hear them in the sub unless my ear is pressed to the speaker. I am trying headphones Wednesday for my 400 foot dive. </div><div>The radios are at least 30 years old maybe more and the company is long gone. I can try Delta.</div><div>thanks'</div><div>Hank</div><div><br></div>
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On Sunday, May 13, 2018, 1:07:15 PM MDT, Al Secor via Personal_Submersibles <personal_submersibles@psubs.org> wrote:
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<div><div id="yiv9922816440"><div><div style="color:#000;background-color:#fff;font-family:Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:13px;"><div id="yiv9922816440yui_3_16_0_ym19_1_1526194731706_33290"><span>Brian,</span></div><div id="yiv9922816440yui_3_16_0_ym19_1_1526194731706_33291"><span><br clear="none"></span></div><div id="yiv9922816440yui_3_16_0_ym19_1_1526194731706_33293"><span id="yiv9922816440yui_3_16_0_ym19_1_1526194731706_33341">Actually what hank is talking about is audio frequency, 10khz, ultrasonic. Most antenna analyzers won't go below 160 meters which is about 1.8Mhz RF. They are also designed for 50 ohm impedance which I am sure the transducer isn't even close to.</span></div><div id="yiv9922816440yui_3_16_0_ym19_1_1526194731706_33295"><span><br clear="none"></span></div><div id="yiv9922816440yui_3_16_0_ym19_1_1526194731706_33339"><span>Hank,</span></div><div id="yiv9922816440yui_3_16_0_ym19_1_1526194731706_33297"><span><br clear="none"></span></div><div id="yiv9922816440yui_3_16_0_ym19_1_1526194731706_33300"><span id="yiv9922816440yui_3_16_0_ym19_1_1526194731706_33299">Your best bet would be to go directly to the manufacturer who made the radio since the output stage would be tuned for the specific transducer used. Ultrasonic transducers vary in configuration are are specific to a given design. Maybe Delta Oceanographics can give you some info. </span></div><div></div><div id="yiv9922816440yui_3_16_0_ym19_1_1526194731706_33302"> </div><div class="yiv9922816440signature" id="yiv9922816440yui_3_16_0_ym19_1_1526194731706_33338">Al Secor</div><div class="yiv9922816440qtdSeparateBR" id="yiv9922816440yui_3_16_0_ym19_1_1526194731706_33303"><br clear="none"><br clear="none"></div><div class="yiv9922816440yahoo_quoted" id="yiv9922816440yui_3_16_0_ym19_1_1526194731706_33365" style="display:block;"> <div id="yiv9922816440yui_3_16_0_ym19_1_1526194731706_33364" style="font-family:Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:13px;"> <div id="yiv9922816440yui_3_16_0_ym19_1_1526194731706_33363" style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"> <div class="yiv9922816440yqt6174263922" id="yiv9922816440yqt54193"><div dir="ltr"> <font size="2" face="Arial"> </font><hr size="1"> <b><span style="font-weight:bold;">From:</span></b> Brian Cox via Personal_Submersibles <personal_submersibles@psubs.org><br clear="none"> <b><span style="font-weight:bold;">To:</span></b> Personal Submersibles General Discussion <personal_submersibles@psubs.org> <br clear="none"> <b><span style="font-weight:bold;">Sent:</span></b> Sunday, May 13, 2018 2:04 PM<br clear="none"> <b><span style="font-weight:bold;">Subject:</span></b> Re: [PSUBS-MAILIST] transducer<br clear="none"> </div> <div class="yiv9922816440y_msg_container" id="yiv9922816440yui_3_16_0_ym19_1_1526194731706_33362"><br clear="none"><div id="yiv9922816440"><div id="yiv9922816440yui_3_16_0_ym19_1_1526194731706_33361"><div id="yiv9922816440yui_3_16_0_ym19_1_1526194731706_33360" style="font-family:Arial, sans-serif;font-size:10pt;"><div id="yiv9922816440yui_3_16_0_ym19_1_1526194731706_33369">Hank, It's still RF energy correct? It may be able to give you an accurate reading of what it is giving off in terms of radio frequency. I'm going to be testing an antenna for my sailboat in a couple of days over at a friends house. I'm using the backstay cable (7 mm) which we are going to simulate how it would be on the sailboat. The cable is about 33' long and will have insulators in between where it connects to the boat. The cable will be "end feed" , which is not ideal for a good antenna but can be compensated for with a antenna tuner. I'll talk to my friend about your transducer situation. AM frequency is around 1000 KHz.</div><div id="yiv9922816440yui_3_16_0_ym19_1_1526194731706_33371"> </div><div id="yiv9922816440yui_3_16_0_ym19_1_1526194731706_33367">Brian</div><div> </div><div class="yiv9922816440yqt5858086576" id="yiv9922816440yqt51632"><div id="yiv9922816440yui_3_16_0_ym19_1_1526194731706_33359"> <br clear="none"><br clear="none">--- personal_submersibles@psubs.org wrote:<br clear="none"><br clear="none">From: hank pronk via Personal_Submersibles <personal_submersibles@psubs.org><br clear="none">To: Brian Cox via Personal_Submersibles <personal_submersibles@psubs.org><br clear="none">Subject: Re: [PSUBS-MAILIST] transducer<br clear="none">Date: Sun, 13 May 2018 15:40:46 +0000 (UTC)<br clear="none"><br clear="none"></div><div id="yiv9922816440yui_3_16_0_ym19_1_1526194731706_33374" style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px;"><div></div>
<div id="yiv9922816440yui_3_16_0_ym19_1_1526194731706_33373">Brian, what is that? The transducer is for under water.</div><div id="yiv9922816440yui_3_16_0_ym19_1_1526194731706_33376">Hank</div><div id="yiv9922816440yui_3_16_0_ym19_1_1526194731706_33378"><br clear="none"></div><div id="yiv9922816440yui_3_16_0_ym19_1_1526194731706_33380"><br clear="none"></div>
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On Sunday, May 13, 2018, 9:28:42 AM MDT, Brian Cox via Personal_Submersibles <personal_submersibles@psubs.org> wrote:
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<div id="yiv9922816440yui_3_16_0_ym19_1_1526194731706_33394"><div id="yiv9922816440yui_3_16_0_ym19_1_1526194731706_33393"><div id="yiv9922816440yui_3_16_0_ym19_1_1526194731706_33392"><div id="yiv9922816440yui_3_16_0_ym19_1_1526194731706_33391" style="font-family:Arial, sans-serif;font-size:10pt;"><div id="yiv9922816440yui_3_16_0_ym19_1_1526194731706_33390">Hank, I wonder if an antenna analyzer might work ?</div><div> </div><div>Brian</div><div> </div><div><div><br clear="none"><br clear="none">--- personal_submersibles@psubs.org wrote:<br clear="none"><br clear="none">From: hank pronk via Personal_Submersibles <personal_submersibles@psubs.org><br clear="none">To: Personal Submersibles General Discussion <personal_submersibles@psubs.org><br clear="none">Subject: [PSUBS-MAILIST] transducer<br clear="none">Date: Sun, 13 May 2018 13:46:02 +0000 (UTC)<br clear="none"><br clear="none"></div><div style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px;"><div>HI All,</div><div>I am looking for a 10Hz transducer for my coms. Does anyone know how to test a transducer to determine if it is 10Hz or 27Hz.</div><div>Hank</div></div></div>_______________________________________________
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