Today's Message Index:
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1. 04:37 AM - Re: MGL CHT probe (Kent or Jackie Ashton)
2. 08:43 AM - Re: Lithium Webinar (Robert L. Nuckolls, III)
3. 05:08 PM - Re: old B and C SD-8 Dynamo failure (Mark Todd)
Message 1
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Subject: | Re: MGL CHT probe |
> On Apr 4, 2017, at 11:42 PM, Jeff Point <jpoint@wi.rr.com> wrote:
>
> This seems like a pretty cheeseball setup. =46rom what I know of
K-type thermocouples (mostly from reading the 'Connection) that wires
must be silver soldered to the probe and to each other. Or, am I
mistaken and is this a reasonable setup?
What you have will probably work just fine but yes, the high dollar
thermocouples usually silver-solder the wires to the copper ring and
incorporate a support (pic), however they=99re amazingly
expensive.
Silver-soldering is a good skill to learn and does not take much more
than a propane torch and the proper materials. Here are a couple I made
as an experiment (2nd pic). They use copper sparkplug gaskets and a
piece of stainless welding wire as the support. A =9Cresist=9D
is a material applied to the parts that you don=99t want the
solder to flow onto. Wite-out makes a pretty good resist. The tricky
part is jigging the parts while you heat them. This place has all the
supplies and there are many Youtube videos.
https://contenti.com
Time or money, take your choice. :-)
-Kent
Message 2
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Subject: | Re: Lithium Webinar |
At 05:34 PM 4/3/2017, you wrote:
>Because there is interest on this list I thought it might be
>appropriate to post that there is an upcoming EAA Webinar on the
>subject of lithium batteries:
>
><http://pages.eaa.org/WBN2017-05-31LithiumBatteriesExplained_LP-Registration.html>http://pages.eaa.org/WBN2017-05-31LithiumBatteriesExplained_LP-Registration.html
Thanks for the heads-up! I'll check it out . . .
Bob . . .
Message 3
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Subject: | Re: old B and C SD-8 Dynamo failure |
> Are the windings smoked? Do they smell bad?
I thought there was a burnt smell from the dynamo before I pulled it off
the engine. Here at my bench, is smells fine. Now I wonder if that
burnt smell was from something else in that 2300+ hour engine compartment.
>
> The DC resistance of this product is less than
> 0.25 ohms. So if you had a shorted turn or two,
> you could not resolve it with jelly-bean test
> equipment. The magnets are ferrites . . . rather
> brittle. You probably couldn't get them loose
> without breaking them up.
OK.
>
>
>> Bob, if you wanted to look at this dynamo for some reason, I'll be happy
>> to mail it to you. I suspect you've got much better things to do than
>> 'paleo-forensics' on this dated item.
>>
>> Mark
> Actually, I would like to see it. I have
> a drive stand running that fits the SD8
> and I'm equipped to test/inspect it in
> detail. Getting a close up look at a sample
> with this kind of service on it would be
> illuminating.
>
> Send the rectifier/regulator too. I'll
> get them checked out and repaired/replaced
> as needed.
>
>
> Bob . . .
I'll get the dynamo and regulator off to you within the next couple of
days, using your PO Box 130 address unless you instruct otherwise.
Thanks for looking at this. If it checks out OK, I guess it'll mean
that I missed a faulty connection somewhere that got cleared up with the
replacement. After all these years of flawless service, I can't decide
whether I'm rooting for the dynamo or me!
Mark
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