[TenTec] OT Antenna Tuners

[Dr. Gerald N. Johnson]

On Sat, 2008-07-26 at 18:29 -0700, 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.

But those impedances are 6:1, not 4:1.

>   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. 

The DX-60 would load up practically anything including the open coax
connector. It wasn't nearly as picky as modern SSB gear.

>  I do not remember the power rating of it.  I use to have one. 

I'm sure I have Heathkit catalogs with it in them.

>  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
> 
73, Jerry, K0CQ