On Jul 8, 12:32 pm, dxAce wrote:

- - - - They once threatened to sue me for making matching
transformers.

- - - No ****?
- - - On what grounds?

- - They indicated in their letter (sure wish I still had it,
- - as I'd frame it!) that it was a proprietary design and
- - I had no business making them and selling them.
- -
- - I believe I wrote back asking them what was proprietary
- - about winding some wire on a ferrite toroid. Additionally,
- - my case design was different from theirs as well.
- -
- - I never heard back from them again.
- -
- - My design was based upon the work of John Bryant
- - and Nick Hall-Patch and appeared in Fine Tuning's
- - 'Proceedings' in the late 80's as I recall.

- For those interested here are some links:
-
- http://members.aol.com/DXerCapeCod/z_transformers.pdf
-
- http://www.dxing.info/equipment/impe...ing_bryant.pdf

Shortwave Radio Listener (SWL) Newbies -Read-
The Verdict : Magnetic Longwire Balun Is Too Expensive
-by- Alan Johnson -source- HardCoreDX.Com
http://www.hard-core-dx.com/nordicdx.../magbalun.html
The N8KDV 10:1 transformer is the best buy, based on price and
performance.

N8KDV -aka- DX Ace

RF Systems Magnetic Longwire Balun (MLB) -versus-
N8KDV 10:1 Matching Transformer
http://www.iserv.net/~n8kdv/xfmr.htm