[SADXA] dummy load oil??

[W7EXG]

Hi Ron,

I found my old Heath HN-31 1962 Cantenna Assembly Manual.. and on Pg. 9 - Final Assembly -- it states:

The recommended Transformer Oil may be obtained from most any bulk oil plant.. If transformer oil is NOT available, mineral oil may be used, but do not use any type of Motor Oil. The Vaporizing Temperature of Motor Oil is too low, and would cause excess vapor. 

Looks like Mineral Oil will work.  Be interesting to look up the Vaporizing Temps. 

My HN-31 still has the original Transformer Oil.. after 52 years, and has not leaked. Some vaporizing has occurred, ..since the oil level is a bit low. Thus, I also should replace the oil. 

Best 73s, 

Bill Davis W7EXG