[AMRadio] 100 microhenry inductor


Bob Bruhns bbruhns at erols.com
Wed Sep 21 22:13:11 EDT 2005


Brian is right.  For receive, a small slug-tuned coil would probably work.  But for transmitting, it would flame out quick!  You
would need a heavy wire coil like Barrie described, and/or a rotary inductor of similar dimensions.

Bacon, WA3WDR


----- Original Message ----- 
From: <bcarling at cfl.rr.com>
To: "Discussion of AM Radio" <amradio at mailman.qth.net>
Sent: Wednesday, September 21, 2005 9:35 PM
Subject: Re: [AMRadio] 100 microhenry inductor


> Hmmm, shunt feed on a tower usually only requires a series
> capacitor.
>
> However, if you DO need an inductor this would NOT be a good
> idea - using a small slug-tuned core type of coil!
>
> On 21 Sep 2005 at 8:32, Barrie Smith wrote:
>
> > I don't know if slug tuning would work.
> >
> > The coil, as I see it, would be something close to 70 turns #8 wire, wound
> > on a 4" form, length unkown, as yet.
> >
> > It's to be used as part of a pi network for a 160M shunt-fed tower.
> >
> > I can make one.  I just became curious, while thinking about it, if there
> > was such a thing as a 100 microhenry inductor.
> >
> > I think Colin's idea of part fixed and part variable is well worth
> > considering.
> >
> > 73, Barrie, W7ALW
> >
> > ----- Original Message ----- 
> > From: <bcarling at cfl.rr.com>
> > To: "Discussion of AM Radio" <amradio at mailman.qth.net>
> > Sent: Wednesday, September 21, 2005 3:58 AM
> > Subject: Re: [AMRadio] 100 microhenry inductor
> >
> >
> > > Can it be slug tuned? How many do you need?
> > >
> > > I may have some that would work.
> > >
> > > On 20 Sep 2005 at 19:39, Barrie Smith wrote:
> > >
> > >> Hello All:
> > >>
> > >> For an antenna project, I have need for a 100 microhenry adjustable
> > >> inductor.
> > >>
> > >> I can wind one, and provide taps throughout.  However, I'm wondering if
> > >> there is such a thing as a 100 microhenry rotary inductor.
> > >>
> > >> And, if there is, where would I find one?
> > >>
> > >> 73, Barrie, W7ALW
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