---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Fri 09/09/16: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 12:12 PM - Thermocouple construction (Paul Eckenroth) 2. 01:33 PM - Re: Thermocouple construction (Kent or Jackie Ashton) 3. 03:05 PM - Re: Thermocouple construction (Charlie England) ________________________________ Message 1 _____________________________________ Time: 12:12:10 PM PST US Subject: AeroElectric-List: Thermocouple construction From: "Paul Eckenroth" I need to create CHT thermocouples for use in a VW engine. The engine has small diameter holes drilled in the head with a set screw perpendicular to secure the thermocouple. The drilled hole is just large enough to allow a dsub male pin to be inserted. Since I already have old CHT probes as used on a Lycoming, my plan is to cut off the existing too large probe and insert the two stripped wires into the dsub, crimp, and insert into the hole and secure with the set screw. Since I am not an expert on thermocouples, I would like to know if this is a valid approach. Is the crimp enough to form the thermocouple. Should solder be used, etc. All information will be appreciated. Thanks. Paul Read this topic online here: http://forums.matronics.com/viewtopic.php?p=460375#460375 ________________________________ Message 2 _____________________________________ Time: 01:33:51 PM PST US Subject: Re: AeroElectric-List: Thermocouple construction From: Kent or Jackie Ashton Its only required that you twist the wires together and they make good contact with the engine but silver-solder will make them a little more robust. I made a little writeup here on how to make them for a Lycoming http://www.canardzone.com/forum/topic/31152-homemade-cht-bayonet-sensor/#entry58923 -Kent > On Sep 9, 2016, at 3:06 PM, Paul Eckenroth wrote: > > > I need to create CHT thermocouples for use in a VW engine. The engine has small diameter holes drilled in the head with a set screw perpendicular to secure the thermocouple. The drilled hole is just large enough to allow a dsub male pin to be inserted. Since I already have old CHT probes as used on a Lycoming, my plan is to cut off the existing too large probe and insert the two stripped wires into the dsub, crimp, and insert into the hole and secure with the set screw. Since I am not an expert on thermocouples, I would like to know if this is a valid approach. Is the crimp enough to form the thermocouple. Should solder be used, etc. All information will be appreciated. Thanks. > > Paul > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=460375#460375 > > > > > > > > > > ________________________________ Message 3 _____________________________________ Time: 03:05:46 PM PST US From: Charlie England Subject: Re: AeroElectric-List: Thermocouple construction You do need to pay attention to whether your gauge/monitor expects grounded or ungrounded probes. (Some may allow you to select which you're using, but some don't.) Charlie On Fri, Sep 9, 2016 at 3:27 PM, Kent or Jackie Ashton wrote: > kjashton@vnet.net> > > It=99s only required that you twist the wires together and they mak e good > contact with the engine but silver-solder will make them a little more > robust. I made a little writeup here on how to make them for a Lycoming > http://www.canardzone.com/forum/topic/31152-homemade- > cht-bayonet-sensor/#entry58923 > > -Kent > > On Sep 9, 2016, at 3:06 PM, Paul Eckenroth wrote: > > > jeckenroth@nbn.net> > > > > I need to create CHT thermocouples for use in a VW engine. The engine > has small diameter holes drilled in the head with a set screw perpendicul ar > to secure the thermocouple. The drilled hole is just large enough to all ow > a dsub male pin to be inserted. Since I already have old CHT probes as > used on a Lycoming, my plan is to cut off the existing too large probe an d > insert the two stripped wires into the dsub, crimp, and insert into the > hole and secure with the set screw. Since I am not an expert on > thermocouples, I would like to know if this is a valid approach. Is the > crimp enough to form the thermocouple. Should solder be used, etc. All > information will be appreciated. Thanks. > > > > Paul > > > > > > > > > > Read this topic online here: > > > > http://forums.matronics.com/viewtopic.php?p=460375#460375 > > > > > > > > > > > > > > > > > > > > > > =========== =========== =========== =========== =========== > > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.