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Transformer Oil Suppliers

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David Lesher

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Nov 11, 2012, 10:39:47 PM11/11/12
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We need less than a gallon of transformer oil for coolant.
Does anyone sell such small quantities?


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atec77

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Nov 11, 2012, 10:59:05 PM11/11/12
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On 12/11/2012 1:39 PM, David Lesher wrote:
> We need less than a gallon of transformer oil for coolant.
> Does anyone sell such small quantities?
>
>
any sort of high temp cooking oil
transformer oil can be toxic and is difficult to find

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David Lesher

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Nov 11, 2012, 11:31:56 PM11/11/12
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atec77 <"atec77 "@hotmail.com> writes:

>> We need less than a gallon of transformer oil for coolant.
>> Does anyone sell such small quantities?
>>
>>
>any sort of high temp cooking oil
> transformer oil can be toxic and is difficult to find

We don't want cooking oil.

If transformer oil is toxic, the MSDS would say so.

atec77

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Nov 11, 2012, 11:54:23 PM11/11/12
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On 12/11/2012 2:31 PM, David Lesher wrote:
> atec77 <"atec77 "@hotmail.com> writes:
>
>>> We need less than a gallon of transformer oil for coolant.
>>> Does anyone sell such small quantities?
>>>
>>>
>> any sort of high temp cooking oil
>> transformer oil can be toxic and is difficult to find
>
> We don't want cooking oil.
not wanting it doesn't mean you shouldn't use it
>
> If transformer oil is toxic, the MSDS would say so.
not always
try trans fluid it works
>
>


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Bert

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Nov 12, 2012, 9:00:10 AM11/12/12
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In news:k7ps69$15g$1...@dont-email.me atec77 <"atec77 "@hotmail.com> wrote:

> On 12/11/2012 1:39 PM, David Lesher wrote:
>> We need less than a gallon of transformer oil for coolant.
>> Does anyone sell such small quantities?
>>
>>
> any sort of high temp cooking oil

Not cooking oil; vegetable or animal derived oils will go rancid over
time and don't handle really high temperatures very well. Mineral oil is
much more appropriate.

> transformer oil can be toxic and is difficult to find

Traditional transformer oil contained PCBs. The new stuff doesn't.

MFJ sells 1 gallon bottles for $30.

http://www.mfjenterprises.com/Product.php?productid=MFJ-21

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Bert Hyman W0RSB St. Paul, MN be...@iphouse.com

David Lesher

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Nov 12, 2012, 1:15:10 PM11/12/12
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Bert <be...@iphouse.com> writes:


>Not cooking oil; vegetable or animal derived oils will go rancid over
>time and don't handle really high temperatures very well. Mineral oil is
>much more appropriate.

>> transformer oil can be toxic and is difficult to find

>Traditional transformer oil contained PCBs. The new stuff doesn't.

>MFJ sells 1 gallon bottles for $30.

There's been no PCB's in transformer oil (or anything else
sold...) since 1979. GE is still trying to clean up the Hudson
River.

>http://www.mfjenterprises.com/Product.php?productid=MFJ-21

Thank you. This is the coolant for the motor controller
we built; for an electric Miata we've named QAR. The heat
sinks have copper tubing embedded in them. We need thermal
conductivity and electrical isolation since the heat sinks are
200V apart, and are not referenced to the frame.

We tried mineral oil but the viscosity is way too high.
Fluorinert would be ideal but would likely cost more than all we
have spent to date. We're looking at DOT5 brake fluid as well.

Bert

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Nov 12, 2012, 1:23:04 PM11/12/12
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In news:k7rebd$oua$1...@reader1.panix.com David Lesher <wb8...@panix.com>
wrote:

> Bert <be...@iphouse.com> writes:
>
>
>>Not cooking oil; vegetable or animal derived oils will go rancid over
>>time and don't handle really high temperatures very well. Mineral oil
>>is much more appropriate.
>
>>> transformer oil can be toxic and is difficult to find
>
>>Traditional transformer oil contained PCBs. The new stuff doesn't.
>
>>MFJ sells 1 gallon bottles for $30.
>
> There's been no PCB's in transformer oil (or anything else
> sold...) since 1979. GE is still trying to clean up the Hudson
> River.

I'm old enough that products introduced in 1979 still count as "new
stuff."

Dave Platt

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Nov 12, 2012, 2:02:10 PM11/12/12
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In article <XnsA10951688F...@216.250.188.140>,
Bert <be...@iphouse.com> wrote:

>Not cooking oil; vegetable or animal derived oils will go rancid over
>time and don't handle really high temperatures very well. Mineral oil is
>much more appropriate.
>
>> transformer oil can be toxic and is difficult to find
>
>Traditional transformer oil contained PCBs. The new stuff doesn't.
>
>MFJ sells 1 gallon bottles for $30.
>
>http://www.mfjenterprises.com/Product.php?productid=MFJ-21

Another option is to check your local animal-feed store.

Light, food-grade mineral oil is sold as a laxative for horses and
cattle.

One online source I just checked, lists it at $22 for a two-gallon tub.

If you've got a feed store near you, it might be a significantly less
expensive source for this sort of oil - cheaper than MFJ per gallon
and you could save the (considerable) shipping cost.

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David Lesher

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Nov 12, 2012, 2:40:26 PM11/12/12
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dpl...@radagast.org (Dave Platt) writes:


>Another option is to check your local animal-feed store.

>Light, food-grade mineral oil is sold as a laxative for horses and
>cattle.

Only some xfmr oil is mineral-based. I'm not sure what kind of
transformer oil MFJ is selling, and have a query in with them.

Bruce Gordon

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Nov 12, 2012, 2:54:12 PM11/12/12
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In article <k7pr23$77i$1...@reader1.panix.com>,
David Lesher <wb8...@panix.com> wrote:

> We need less than a gallon of transformer oil for coolant.
> Does anyone sell such small quantities?

I use standard 32 Wt Turbine Oil (Hydraulic Oil Food Grade)
Hasn't been a problem for my 1Kw Cantenna, for years....

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grumpy

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Nov 25, 2012, 9:56:00 PM11/25/12
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Look up Refrigeration oils viscosity varies largely 100 to 700
and if you really want good oil lookup Diffusion pump oils
diffusion oil is high temp. and high vacuum oil.

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