Heath had them and B & W did also. I have 2 of the B&W coil sets if
anybody is interested.
207 Gibbons Place
Marietta Ohio 45750
On Sat, 26 Jul 2008, Jim WA9YSD wrote:
> I believe Heath Kit made a bifilar wound open air coil, and it use to match
> 4:1, 50 to 300 or 75 to 450 ohms coil. Thats before Ferrous type cores were
> used for you young folk. It was installed in series, at the output of the
> TUBE transmitter, like a DX 60. I do not remember the power rating of it. I
> use to have one. Not sure if it had issues on 10 meters or not. Coil was
> about 8 inches long. about 2 or 3 inches in diameter. No capacitors, but its
> been too long ago.
> Keep The Faith, Jim K9TF/WA9YSD
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