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Re: [TowerTalk] Modifying Comtek 4-square controller(relay unit) for a d

To: "Lux, Jim" <jim@luxfamily.com>
Subject: Re: [TowerTalk] Modifying Comtek 4-square controller(relay unit) for a different band?
From: Haring family <dcharing@gmail.com>
Date: Sun, 21 Nov 2021 21:34:24 -0500
List-post: <mailto:towertalk@contesting.com>
What about Llewellyn's model of the hybrid coupler in on4un/5th?

73,

Dave N3AC

On Sun, Nov 21, 2021, 21:16 Lux, Jim <jim@luxfamily.com> wrote:

> On 11/21/21 4:51 PM, Gene Smar via TowerTalk wrote:
> > "For the interested student", here's a treatise on leakage and other
> > losses in power (60 Hz) transformers that might be of use:
> > https://tinyurl.com/2te6xhkv .
> >
> yeah, but that doesn't help with the "how do I make an NT card that
> simulates a transformer" for NEC.
>
>
> >
> > 73 de
> > Gene Smar  AD3F
> >
> >
> > On 11/21/2021 2:11 PM, Michael Tope wrote:
> >> Hi Jim,
> >>
> >> Starting with version 5.0, EZNEC implements the capability to model
> >> lumped transformers, inductors, capacitors, and resistors. Thus, it
> >> should have capability to model the Collins 90deg hybrid. The only
> >> caveat is that the transformer model is ideal (K=1.0), so including
> >> the impact of flux leakage and core loss would have to be captured
> >> with additional components in an equivalent circuit model.
> >>
> >> 73,  Mike W4EF............
> >>
> >
> > _______________________________________________
> >
> >
> >
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> >
>
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