[TowerTalk] Oil For Dummy Load

[Bryan Swadener]

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