John Smith wrote:
The winding to the 50 ohm source will be half the turns of the 100 ohm
winding--and there is no electrical connection between windings--i.e.,
the 50 and 100 windings are separate on the core.

Or it could be wound as an autotransformer.
--
73, Cecil http://www.w5dxp.com

On Feb 7, 8:38*am, Cecil Moore wrote:
John Smith wrote:
The winding to the 50 ohm source will be half the turns of the 100 ohm
winding--and there is no electrical connection between windings--i.e.,
the 50 and 100 windings are separate on the core.

Or it could be wound as an autotransformer.
--
73, Cecil *http://www.w5dxp.com

I still prefer just a simple coax series transformer.
As an example, for a 40m loop, about 22 ft of
75 ohm coax will do the trick.

wrote:
I still prefer just a simple coax series transformer.
As an example, for a 40m loop, about 22 ft of
75 ohm coax will do the trick.

But that wouldn't meet the 2:1 transformer requirement.
--
73, Cecil http://www.w5dxp.com

On Feb 7, 4:46*pm, Cecil Moore wrote:
wrote:
I still prefer just a simple coax series transformer.
As an example, for a 40m loop, about 22 ft of
75 ohm coax will do the trick.

But that wouldn't meet the 2:1 transformer requirement.
--
73, Cecil *http://www.w5dxp.com

Should be pretty close. But calculating it, I show
about 22.7 feet would be the best length for 7.150mhz.
Assuming a 52 ohm feedline, and 75 ohm 1/4 wave
section and a Zr of 120 ohms.
I've used them before. Not really that critical on the
precise length as long as it's pretty close.