REFLECTOR:Exhaust Thermocoupler

[Scott]

At 08:00 AM 11/10/2003, HYTEC45@aol.com wrote:
>I have a Vision 1000 and had a cylinder (#3) take a jump in indicated EGT 
>after 20/25min. of operation a flight back.  Every thing was fine with all 
>jugs showing 1350, when #3 jumped to 1500/25.  I don't really think a 
>cylinder can get that high as mine seem to stumble around 1425.  My 
>thermocouplers are mounted 2" from the flange.  When I pulled power during 
>the approach and things cooled off, the thermocoupler seemed to read 
>normal along with the others.  A friend with a Berkut said he had a 
>thermocoupler go bad and they will either read nothing, or go full scale 
>to 1500.
>
>Just passing that on, but I think someone mentioned an alternate source 
>for the exhaust thermocouplers.  Any one know before I order one from Vision?
>
>Thanks
>TEC


TEC,  heres a copy of an email I sent a while ago regarding thermocouples 
for the Vision

I think the AS part number was MM-111

<<COPY FOLLOWS>>>>>

installed my cheaper parts today.

one MP sensor, bought from Digi-Key for $44, Vision price $79
one EGP probe bought from AS for $35, Vision price $69

The MP sensor was the same part, manufacturer and part number, as Vision was
selling. So basically the same part, but not repackaged by Vision.  It
worked perfectly.

The EGT probe was made by Universal Sensors and looks to be a superior
product than the ones that came with the VM1000.   Higher quality
probe(built in heat sink, better wire support at  termination),  easier
installation because of configuration of clamp and probe,  higher quality
wire(stainless outer braid instead of plastic).  It worked perfectly too.
Tme will tell as to how nuch staying power the replacement probe has.

I'm not saying not to buy a VM1000 system, but I think it would be wise to
shop around for replacement parts, since they have chose to apply an almost
100% markup on accessories that they don't manufacture.  Quite a high price
for redistribution.

I think we are lucky and well served by the Velocity Factory because they
have chosen to not play this game.

Scott