On Fri, 26 Jan 2007 02:03:04 GMT, Telamon
wrote:

In article ,
David wrote:

On Thu, 25 Jan 2007 03:06:28 GMT, Telamon
wrote:


If you use a cable TV Balun you'll get a quick and dirty 4:1
transformer and a marked improvement.

http://www.radioshack.com/product/in...2&cp=&sr=1&ori
gkw=matching+transformer&kw=matching+transformer&p arentPage=search

Those don't work well below 10 MHz. 15 MHz and higher they are OK.

How do you know?

I tested them.

What is the low frequency limiting component?

I didn't go as far as that. This unit is made of a ferrite core and a
couple of very small value capacitors. I would guess the core was the
problem.

I've reverse engineered a bunch of them. The ones with caps are very
rare.