|[AMRadio] Re: Link coupling|
ars.w5omr at gmail.com
Wed Sep 5 14:20:55 EDT 2007
A.R.S. - WA5AM wrote:
>> Except that the gap in the stationary coil would be smaller, and the link
>> coil would extend inside both sections of the stationary coil.
> This brings up a thought I've had about link coupled tuners, of which I use.
> Of course I feed the 50 ohm coax to the link. The center to one side
> of the link and the shield (ground) to the other. What effect does
> the "link position" have on a tuner? I suspect the link position
> (mine is rotatable) would affect the matching impedance to the coax?
I think that'd be a WA5BXO question. He built his own link-coupled
tuner, yet the link was 'stationary' and didn't move, or rotate.
He also had several taps on a healthy piece of air-dux coil-stock. The
'link' was wrapped -around- the air-dux, with matching taps on the
opposite side of the air-dux.
Two sets of switches to move the taps in/out as needed for frequency,
and two capacitors.
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