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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>We had a club member who put the BW35 automatic from a Triumph 2000 into a TR4. His readings were similar to yours.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b>From:</b> Triumphs <triumphs-bounces@autox.team.net> <b>On Behalf Of </b>Sujit Roy<br><b>Sent:</b> Saturday, August 15, 2020 1:25 PM<br><b>To:</b> DAVID MASSEY <Dave1massey@cs.com><br><b>Cc:</b> Triumphs <triumphs@autox.team.net><br><b>Subject:</b> Re: [TR] Thermal Transmitter Temperature Sender help<o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>Thanks. I have spare parts and I plan to create a setup on a bench. I have some documents on how to check the gauge and voltage stabilizer and noe some resistance no. If my set up models that of my stag. I will have some sanity. My stag has a 3 speed BW35. Box. At around 70 mph the engine speed is close to 4k rpm. Did the tr7 use a bw35. If so are these numbers similar<o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>On Sat, Aug 15, 2020, 10:35 AM DAVID MASSEY <<a href="mailto:dave1massey@cs.com">dave1massey@cs.com</a>> wrote:<o:p></o:p></p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in'><div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial",sans-serif;color:black'>That could be problematic. If the Stag gauges work like those in the TR4-6 there is a voltage stabilizer that maintains a constant average 10 volts on the gauge. But the original stabilizer is an early form of a PWM regulator. The contacts will alternately apply full battery volts and zero on a proportional basis such that the average is 10 volts. And the switching frequency is about one hertz. The gauges react slowly enough that they average it out just fine but if you put a voltmeter on it you will see the voltage switching on and off fast enough that your meter won't have time to settle out and give a meaningful reading. <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial",sans-serif;color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial",sans-serif;color:black'>There are after-market stabilizers available that use a solid-state IC voltage regulator providing a constant 10 volts. If you have one of those you could get a reliable reading. But that is if you have one of those.<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial",sans-serif;color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial",sans-serif;color:black'>All that said, if I had a resistance value for the gauge I could calculate what you would get if an IC stabilizer was installed.<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial",sans-serif;color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:13.5pt;font-family:"Arial",sans-serif;color:black'>Dave </span><span style='font-size:12.0pt;font-family:"Arial",sans-serif;color:black'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial",sans-serif;color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial",sans-serif;color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>-----Original Message-----<br>From: Sujit Roy <<a href="mailto:triumphstag@gmail.com" target="_blank">triumphstag@gmail.com</a>><br>To: DAVID MASSEY <<a href="mailto:Dave1massey@cs.com" target="_blank">Dave1massey@cs.com</a>><br>Cc: Triumphs <<a href="mailto:triumphs@autox.team.net" target="_blank">triumphs@autox.team.net</a>><br>Sent: Sat, Aug 15, 2020 11:30 am<br>Subject: Re: [TR] Thermal Transmitter Temperature Sender help<o:p></o:p></span></p><div id="m_4638235716154564889yiv4365019461"><div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>Follow up question. Does anyone have data showing what the voltage at the gauge should be to resistance values.<o:p></o:p></span></p></div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'><o:p> </o:p></span></p><div id="m_4638235716154564889yiv4365019461yqt12730"><div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>On Fri, Aug 14, 2020, 12:15 PM DAVID MASSEY <<a href="mailto:dave1massey@cs.com" target="_blank">dave1massey@cs.com</a>> wrote:<o:p></o:p></span></p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in'><div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial",sans-serif;color:black'>Here are some data for the TR8. This might be close enough for the stag:<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial",sans-serif;color:black'>Temp C Temp F Orig ohms GTR110 ohms<br>50 122 332 290<br>55 131 275 242<br>60 140 227 197<br>65 149 193 169<br>70 158 158 142<br>75 167 134 120<br>80 176 114 102<br>85 185 99 91<br>90 194 85 77<br>95 203 74 65<br>100 212 60 55<br>105 221 51 48<br>110 230 44 41<br>115 239 37 37<br>120 248 32 31<br>125 257 28 28<br>130 266 24 25<br>135 275 21 22<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial",sans-serif;color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial",sans-serif;color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial",sans-serif;color:black'>If you have a source of resistors in this value range you can connect them in lieu of the sensor and check the reading to see if it is close.<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial",sans-serif;color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:13.5pt;font-family:"Arial",sans-serif;color:black'>Dave </span><span style='font-size:12.0pt;font-family:"Arial",sans-serif;color:black'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial",sans-serif;color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial",sans-serif;color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>-----Original Message-----<br>From: Sujit Roy <<a href="mailto:triumphstag@gmail.com" target="_blank">triumphstag@gmail.com</a>><br>To: Triumphs <<a href="mailto:triumphs@autox.team.net" target="_blank">triumphs@autox.team.net</a>><br>Sent: Fri, Aug 14, 2020 11:31 am<br>Subject: [TR] Thermal Transmitter Temperature Sender help<o:p></o:p></span></p><div id="m_4638235716154564889yiv4365019461m_-1604197066133898725yiv7413154317"><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>I'm going to try and figure out if my Stag is running hot. The gauge always reads high <o:p></o:p></span></p><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>I found a note on another forum on how to test the voltage regulator, and another forum how to calibrate the gauge.<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>I'm trying to figure out how to test the Thermal Transmitter Temperature Sender. Does anyone have any data on how the resistance changes with temperature?<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>Since most Triumph around the 70's used Smith gauges, I'm assuming the data for the Thermal Transmitter Temperature Sender would be the same.<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>Regards, Sujit<br clear=all><o:p></o:p></span></p><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'><o:p> </o:p></span></p></div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>-- <o:p></o:p></span></p><div><div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>Sujit Roy<br>Cupertino, California<o:p></o:p></span></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'><br><a href="https://triumphstagblog.wordpress.com/" target="_blank">https://triumphstagblog.wordpress.com/</a><o:p></o:p></span></p></div></div></div></div></div></div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>** <a href="mailto:triumphs@autox.team.net" target="_blank">triumphs@autox.team.net</a> **<br><br>Donate: <a href="http://www.team.net/donate.html" target="_blank">http://www.team.net/donate.html</a><br>Archive: <a href="http://www.team.net/pipermail/triumphs" target="_blank">http://www.team.net/pipermail/triumphs </a><a href="http://www.team.net/archive" target="_blank">http://www.team.net/archive</a><br><br>Unsubscribe/Manage: <a href="http://autox.team.net/mailman/options/triumphs/dave1massey@cs.com" target="_blank">http://autox.team.net/mailman/options/triumphs/dave1massey@cs.com</a><o:p></o:p></span></p></div></div></blockquote></div></div></div></div></div></div></blockquote></div></div></body></html>