blockquote, div.yahoo_quoted { margin-left: 0 !important; border-left:1px
#715FFA solid !important; padding-left:1ex !important; background-color:white
!important; } You will not be sorry with the L.
I worked most of my 160 QRP DXCC(over 30+ years) using one.
72, Bob KI0G
Sent from Yahoo Mail for iPhone
On Wednesday, November 30, 2016, 9:27 AM, W0MU Mike Fatchett <w0mu@w0mu.com>
wrote:
Seems like the consensus is the L. I think I will try that over the
radial field of the existing Cushcraft. Having it separate from the 80
also allows me to run two radios at the same time if need. More
flexibility.
Thanks all for your suggestions. See you in the Test starting Friday!
W0MU
On 11/30/2016 6:16 AM, donovanf@starpower.net wrote:
> Hi Mike,
>
> An inverted-L with 50-60 feet vertical is a far superior choice than
> a bottom loaded vertical. Its much more efficient, its bandwidth
> is much broader and you don't have to deal with the very high
> voltages at the base of the loaded vertical, especially if you're
> running high power.
>
> 73
> Frank
> W3LPL
>
>
> ------------------------------------------------------------------------
> *From: *"Don Kirk" <wd8dsb@gmail.com>
> *To: *"W0MU Mike Fatchett" <w0mu@w0mu.com>
> *Cc: *"topband" <topband@contesting.com>
> *Sent: *Wednesday, November 30, 2016 12:32:26 PM
> *Subject: *Re: Topband: 160 vertical/L
>
> HI Mike,
>
> I use a 68 foot based loaded vertical on 160 meters with 55 short buried
> ground radials (2500 feet of ground radials). I only run 100 watts and
> located near Indianapolis. I would prefer an Inverted-L over the base
> loaded vertical on 160 meters (the L would be much more efficient), but
> having said that I did acquire my 160 meter DXCC last year (all CW) and
> most of the contacts were during years when 160 meters was in very poor
> condition.
> Note: I do use small pennant antennas for RX on 160 meters.
>
> For starters it sure would be easy to temporarily install a base loading
> coil to test out your full size 80 meter vertical on 160 meters versus
> your
> 33 foot vertical. You can use part of the loading coil you install on the
> full size 80 meter vertical with a fixed high voltage silver mica cap to
> form a simple L network (that's what I do and it works great). This would
> allow you to easily compare your two TX antennas.
> Note: neither end of my base loading coil is connected to ground (my base
> loading coil is between the bottom of my 68 foot vertical and the center
> conductor of my feedline. I use an MFJ 404-0669 air wound coil as my
> loading coil / L network.
>
> But if you can install an Inverted-L easily, than I would skip what I have
> said above and just install the Inverted-L.
>
> Don (wd8dsb)
>
> On Wed, Nov 30, 2016 at 1:33 AM, W0MU Mike Fatchett <w0mu@w0mu.com> wrote:
>
> > I have a full sized 80m vertical and a Top loaded Cushcraft 33ft
> vertical
> > for 160. The Cushcraft gets out but not great.
> >
> > I was thinking about using an inverted L over the radial field that
> I use
> > for the 160. It is 30ish radials of various lengths or I have seen
> where
> > people have loaded the 80m vertical on 160. I think I recall people are
> > not overly excited about bottom loading the 80. The 80 is unguyed
> so the
> > top cannot support anything.
> >
> > I can get the vertical part of the L up 50-60 feet.
> >
> > Any feelings one way or another? I can make a switching system for
> the 80
> > vert if people think this is a reasonable transmitting solution. I
> have a
> > rcv array, so I am hoping to improve my xmit signal.
> >
> > W0MU
> >
> > _________________
> > Topband Reflector Archives - http://www.contesting.com/_topband
> >
> _________________
> Topband Reflector Archives - http://www.contesting.com/_topband
>
_________________
Topband Reflector Archives - http://www.contesting.com/_topband
_________________
Topband Reflector Archives - http://www.contesting.com/_topband
|