Its MSDS lists it as non hazardous. The only difference for food grade
AFAIK is the handling.
Why it goes as hazmat is beyond me.
I used a lot of Dow Derakane Vinyl Ester Resin. It originally cost
about $30 a gallon. You could get 5 gallon samples dirt cheap from Dow,
but never ever tell them it was for an airplane. It was reclassified and
had hazmat shipping. Still came UPS, but now it's $80 a gallon. The
resin was a very low viscosity compared to epoxy so a fiberglass cloth
cloth with a much denser weave could be used. The promoter and
catalyst were things you didn't want to mix. Nasty results.
It had lots of possibilities for antennas, but the resin had a very
short shelf life. Refrigeration really helped.
As for comparability, with organic lubricants, it's a no go. It quickly
forms silicon dioxide SiO2 (powered quartz) which is very abrasive. I
don't know for sure, but I doubt it would be a good idea to mix with
organic oils
73
Roger (K8RI)
On 11/30/2015 7:07 AM, Martin A Flynn wrote:
Roger,
Buying a 5 gallon pail and splitting it up was the original intent.
The potential incompatibility issue with petroleum based oils scared
away most of the folks who only needed to top off existing loads. So
we went with a single gallon jug.
Funny thing is because it is not a consumer item, it ships as
hazmat. There is a food service grade version that is not hazmat.
Got to love UPS.
73 Martin Flynn
W2RWJ
On 11/30/2015 1:12 AM, Roger (K8RI) on TT wrote:
That transformer fluid is basically, plain old 200 fluid. It may, or
may not contain additives. IOW, it's good stuff.
You can probably get it in 5 gallon lots. Get a group buy? OTOH how
many hams are willing to pay $50 a gallon?
73
Roger. (K8RI)
n 11/29/2015 9:53 PM, Martin A Flynn wrote:
The C84025-1 Coaxial Dynamics load (2.5 kW CCS) at our club station
uses Dow-Corning Xiameter PMX-200 silicon fluid.
A gallon was less then $50.00. We would have went with Diala ZX-4
transformer oil, but could not find reliable information if the
residual silicon fluid would safely mix with the Daila.
In either case, the right part is fairly inexpensive - why use a
substitute?
73 Martin Flynn
W2RWJ
On 11/29/2015 9:02 PM, Bryan Swadener via TowerTalk wrote:
No, especially when you're pumping a kilowatt into a 90W-rated
Globar in only a gallon of media that has only the tin bucket
itself to transfer the heat to atmosphere. You need _every bit of
advantage_ you can get. As it is, those DLs are rated a kilowatt
for only a few seconds. That's why I stopped using my HN31 with an
amplifier, and built my compact 1500W (100% D/C) load.
Bryan WA7PRC
From: D. Scott MacKenzie
To: Bryan WA7PRC
Sent: Sunday, November 29, 2015 5:42 PM
Subject: RE: [TowerTalk] Oil For Dummy Load
Mineral oil is a proper substitute - and not "dubious."
-----Original Message-----
From: Bryan WA7PRC
Sent: Sunday, November 29, 2015 8:27 PM
To: towertalk@contesting.com
Subject: Re: [TowerTalk] Oil For Dummy Load
I found one gallon of actual transformer oil for FREE (unless you
count having to drive 2 miles to get it).Why mess around with
dubious substitutes when it's available for FREE?
Bryan WA7PRC
--
73
Roger (K8RI)
---
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