[TowerTalk] Balun Recommendation

[Jim Brown]

On 4/14/2012 10:42 AM, Michael Tope wrote:
> uys, I was testing their Unun. Although I do agree with what K9YC says
> about testing common-mode chokes, I just want to be clear that is not
> what I was testing.  Also, I think thirty seconds key down at 1KW is a
> pretty good test for something with small thermal mass. I would  have
> gone longer, but my amp is a Drake L-7 and I would be leery of running
> it longer than that (even 30 seconds is probably questionable).

Right.  Sorry, I slept through the details of your post. It's clearly 
acting as a classic magnetically coupled transformer, so  yes, I'd say 
it was a very good test, and that it  demonstrates very high 
efficiency.  From that, I'd guess it to be a material like Fair-Rite #61 
or #67.

73, Jim K9YC