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08-22-2010, 07:58 AM
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Join Date: Oct 2008
Location: Schaumburg, IL
Posts: 2,053
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Quote:
Originally Posted by schristo@mac.com
hi Tony, the crimps on the sensor side have been pretty unreliable for me... the solid wire does not hold well unless it is doubled over and i have had to replace the supplied connections on three of the four probes... i used a butt splice rather than the spade connectors.
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Thanks Stephan, I suspect its the connectors. As you probably know by know, it's hard to work on the plane when there's so much flying to do. "Uh, let's see shall I go work on the plane or fly? Who needs EGT anyway!"
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Tony Phillips
N524AP, RV 9 (tail wheel)
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09-05-2010, 06:36 AM
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Join Date: Oct 2008
Location: Schaumburg, IL
Posts: 2,053
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Quote:
Originally Posted by apkp777
For the record, My #4 Dynon probe is acting up. Run's normal then drops to zero then back to normal down a couple hundred over and over. My probes are located at 5.5" from the flange and I will report on the results of my troubleshooting when I get to it.
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I poked around my connections and looked at the probe installation during an oil change and found nothing obvious. However, the next flight the probe was completely dead. A day later I received a replacement probe and again decowled and swapped probes. Op checked good.
I am wondering if anyone knows the expected out put voltage range for the probes. I would like to test the probe in boiling water. The probes looks perfect. I sort of suspect a bad connection at the spade connector, but the connection looked to be sufficient.
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Tony Phillips
N524AP, RV 9 (tail wheel)
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09-07-2010, 10:37 AM
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Join Date: Jun 2005
Location: Woodinville, WA
Posts: 1,499
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Thermocouples don't put out a voltage for a temperature. They put out a voltage for a difference in temp, so if you put them in boiling water you also need to know the temperature where the voltmeter attaches to the probe.
Assuming it's 75 degrees out and you're at sea level, an EGT thermocouple will generate 3.1mV (0.0031 V). You need a good voltmeter to have any accuracy at these voltages.
Thermocouples are very basic devices mechanically and just checking for continuity between the two wires with an ohmmeter will test for 99.9% of problems. They should look like dead shorts.
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03-11-2012, 12:18 PM
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Join Date: Oct 2009
Location: Fort Myers
Posts: 370
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Just an FYI--just had a Dynon EGT sensor probe fail (3rd one in 18 months-all different cylinders). Went to order from Dynon as I'm used to doing and found the cheapest to ship the $36 part was $29..There's a note that states that Dynon now has a $20 handling fee for all orders including small part orders. Are they having financial troubles or are they excessively inefficient on orders? What logic is there in chasing away large order customers when they make more profit on direct orders?
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03-11-2012, 11:59 PM
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Join Date: Oct 2006
Location: Garden City, Tx
Posts: 5,145
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Order them from Stark.
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Greg Niehues - SEL, IFR, Repairman Cert.
Garden City, TX VAF 2020 dues paid 
N16GN flying 700 hrs and counting; IO360, SDS, WWRV200, Dynon HDX, 430W
Built an off-plan RV9A with too much fuel and too much HP. Should drop dead any minute now.
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03-12-2012, 05:20 AM
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Join Date: May 2008
Location: Brisbane Qld. Aust.
Posts: 2,271
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Buddy
Are you in business?
The typical invoice cost for many businesses, ( not Walmart ) is possibly like $70 so when you place an order for even $500 they are lucky to be making a profit.
If more folk actually realised what it REALLY takes to run a company, they would not think the way they do.
Do you like your purchases subsidizing others ? 
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03-12-2012, 09:02 AM
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Join Date: Dec 2008
Location: Big Sandy, WY
Posts: 2,567
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I've run a small business and if I'd charged $20 to handle a $30 part it would have gone under before I sold it. If you can't put a leash on your in-house costs, you've failed.
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Actual repeat offender.
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03-17-2012, 10:41 PM
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Join Date: Jan 2011
Location: Olympia, WA
Posts: 227
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EGT Probe Distance
I have an IO-360 with an original set of VMS probes, replaced one of them last year with just over 650 hours on it, the other 3 are still going strong now with close to 700 hours. My probes are located approx 4 inches from the face of the exhaust flange. I also routinely fly lean of peak with cruise EGTs in the ~1500F-1550F range.
In my experience, 2"-3" from the flange is too close to the exhaust flame for good probe longevity.
Reggie
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11-17-2012, 06:00 PM
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Join Date: Jun 2005
Posts: 846
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shipping charge
Glad to know about new shipping cost its getting to be a big factor in building a plane Ive always thought that I would install Dynon and Im ready to order next week now Ill also take a look at other options.I like companys that stand behind there products .
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11-17-2012, 10:13 PM
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Join Date: Jan 2010
Location: Southern Michigan
Posts: 1,966
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I've left many a web page order form when I get to the payment page that has excessive shipping/handling charges. Some times it pays to shop around and and compare the total costs. I keep a running list in the shop for all the little items I need but can put off until absolutely necessary so hopefully I can combine what would have been separate orders into one. I sell on ebay and ship every day. I add a $2 handling charge to my actual shipping costs to offset the packaging materials cost (peanuts, boxes, tape, and fuel) which I consider to be fair. My guess is that Dynon really would rather you deal with their distributors/dealers.
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David C.
Howell, MI
RV-10: #41686 Under Construction
RV-9A: #90949 Under Construction
RV-10: #40637 Completed/Sold 2016
Cozy MKIV:#656 Completed/Sold 2007
"Donor Exempt" but donated through Dec. 2020
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