Topband: Pennant Transformer

[Earl W Cunningham]

The Pennant transformers sold by Lance Johnson and K1FZ both use the
Amidon FT140-43 core which was specifed in the July 2000 issue of QST. 
Since then it has been found that the Amidon FT-140-77 core is a much
better choice.  The SWR with the -43 core was about 3:1 to 4:1.  Luis,
IV3PRK has found that if you use the -77 core that the SWR will be 1:1.

With the FT140-77 core, use 3 turns for the low-Z (50 ohm) winding and 13
turns for the high-Z (900 ohm) winding.

73, de Earl, K6SE