Finding FREE transformer oil only a couple of
miles away made thoughts of substituting anything
else cease. All I did was call my electric
utility's transformer shop. I s'pose if I couldn't
quickly track it down, or if they didn't want to
give me a gallon, I would've bought a gallon from
MFJ (pn MFJ-21) for $30.
The problem of overheating the 90W Globar (pn
886SP) went away by not pumping more than 100W
into it. If testing above that level is needed,
I use my free scrap parts homebrew dry DL that
can handle 1500W (100% D/C) all day... unless
I run out of cooling air. ;)
BTW, Henry Radio (http://stores.ebay.com/Henry-Radio)
and others sell flange-mounted RF resistors and
terminators for reasonable cost. Right now, I
see a 50 ohm 800W terminator offered for $50
including shipping. Add a heatsink and fan,
and you're in business. :)
vy 73 es gl,
Bryan WA7PRC
http://www.tinyurl.com/wa7prc-dummy
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