The voltage across the capacitor will depend on
how much capacitance is needed to tune the antenna
and the power applied. Plate SPACING will also be a
factor in breakdown voltage. I had NO problem with
a LARGE air variable used on a Gamma Matched 130 ft
tower.
Tom N4KG
On Wed, 23 Oct 2002 Phil - KB9CRY <kb9cry@attbi.com> writes:
> If I may point out another item. You mentioned that you're using air
>
> variables. Those will be OK as long as you limit your power to 100
> watts or so. If you're going to use an amp, then you'll be pumping
> 3Kv
> at some amperage through those, especially the series (gamma) cap.
> If
> this is the case, then you'll need to procure vacuum variables with
> at
> least 3Kv or 5Kv rating. I did the air variable bit, and on 100
> watts
> it was acceptable. When I eventually brought an amp online, the
> arcing
> across the cap plates could be seen from the house! You'll see. Cu
> on
> Topband, Phil KB9CRY
>
> Jim Johnson - KC4HW wrote:
>
> >Want to thanks everyone for the help on the tower. We added the
> >additional air variable as an Omega Match and is worked real good.
> >
> >We are planning to be on 160 during the CQWW SSB..
> >
> >Thanks again for the help.
> >
> >Jim Johnson, KC4HW
> >Melbourne, Florida
> >http://www.kc4hw.net
> >DXCluster RF Connection: 144.95
> >Telnet://kc4hw.homelinux.net:8000
> >_______________________________________________
> >AN Wireless Self Supporting Towers at discounted prices,
> >See http://www.mscomputer.com
> >
> >Wireless Weather Stations now $349.95. Call Toll Free,
> >888-333-9041 for additional information.
> >_______________________________________________
> >Towertalk mailing list
> >Towertalk@contesting.com
> >http://lists.contesting.com/mailman/listinfo/towertalk
> >
>
>
> _______________________________________________
> AN Wireless Self Supporting Towers at discounted prices,
> See http://www.mscomputer.com
>
> Wireless Weather Stations now $349.95. Call Toll Free,
> 888-333-9041 for additional information.
> _______________________________________________
> Towertalk mailing list
> Towertalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
________________________________________________________________
Sign Up for Juno Platinum Internet Access Today
Only $9.95 per month!
Visit www.juno.com
|