[TenTec] OT Antenna Tuners

[Jim Brown K9YC]

On Tue, 22 Jul 2008 09:08:52 -0600, Dr. Gerald N. Johnson wrote:

>EXACTLY the definition of just a transformer.

Gerry's analysis is correct -- it's a TRANSFORMER. Depending on the 
core material (and to some extent, the winding details), it becomes 
increasingly lossy with increasing frequency. For Fair-Rite #61, 
losses begin increasing markedly above about 20 MHz. Fair-Rite has 
other materials for which this happens at a significantly higher 
frequency. #67 is one of them -- good for high power to at least 80 
MHz, but low frequency mu around 40 (as compared to 125 for #61). 

All of this data is in Fair-Rite's excellent online catalog as a 
pdf. http://www.fair-rite.com  

Jim K9YC