[Amps] Vegetable oil dummy load

[Larry Carman]

According to Vectronics, motor oil does not have a sufficiently high
vaporizing temperature and will cause excessive vapor. 

I found the following quote on eHam:
Motor oil is not recommended (at least not for long term use,) as the
volatility and flash point is often lower than mineral oil, and the
additives will corrode the structure of the resistor used in the dummy load.
(ARRL Handbook, 1988, CHapter 34, page 22-23.)

I was once told that there was a brand of motor oil without additives that 
Worked very well in dummy loads. I have no idea what brand it was. 

Regards,
Larry N5BIP


-----Original Message-----
From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com] On
Behalf Of VE6TR at telus.net
Sent: Tuesday, February 28, 2006 4:31 PM
To: Dave Haupt
Cc: amps at contesting.com
Subject: Re: [Amps] Vegetable oil dummy load

Interesting bit of information.  What are the reasons that engine oil (lets
say 
straight 30 weight) is also not considered acceptable?

Rob - VE6TR



Quoting Dave Haupt <emailw8nf at yahoo.com>:

> IMO, vegetable oil is a marginal idea at best.  By
> unfortunate experience, I have learned that it does
> several things that are quite unpleasant:
> 


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