Topband: Choke Construction Info Needed

[DAVID CUTHBERT]

20 uH should be sufficient at the base of a 1/4 wave length vertical.

#4 copper wire is used to connect towers to ground for direct strikes.

Such an inductor can be close-wound with insulated #4 wire, diameter 8", 8
turns.

It should survive intact except for the insulation.

Dave WX7G
 On Jul 26, 2012 2:02 PM, "ZR" <zr at jeremy.mv.com> wrote:

> It all depends upon how much survivability you want, nothing will survive a
> direct hit.  Any 1.5 to 2.5 mH choke will suffice, just look at the safety
> choke in a commercial amp for the smallest choice.
>
> The big ones are often found in scrapped BCB transmitters and tuning units
> as well as show up at hamfests and on Fleabay as old military gear had
> various candidates.
>
> Carl
> KM1H
>
>
> ----- Original Message -----
> From: "Phil Clements" <philclements at centurylink.net>
> To: <topband at contesting.com>
> Sent: Thursday, July 26, 2012 3:03 PM
> Subject: Topband: Choke Construction Info Needed
>
>
> >I need to construct a heavy-duty choke to be installed from the feed point
> > of my 160 meter vertical to ground, for static drain and for lightning
> > protection. How large does the wire, form, and inductance need to be?
> >
> >
> >
> > Thanks in advance for your expertize!
> >
> >
> >
> > (((73)))
> >
> > Phil, K5PC
> >
> >
> >
> > _______________________________________________
> > UR RST IS ... ... ..9 QSB QSB - hw? BK
> >
> >
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> _______________________________________________
> UR RST IS ... ... ..9 QSB QSB - hw? BK
>