On Thu, Aug 2, 2012 at 10:26 AM, Howard Z <[email protected]> wrote:
> I use a 320 foot long horizontal full one wavelength loop antenna designed > for 3.2 MHz. It is fed with approximately 100 feet of 450 ohm ladderline > whose exact length is tuned for lowest SWR on its design frequency. Then > comes a 9:1 balun from CWS bytemark to a palstar at auto antenna tuner. > > I have also used this setup with ldg at200pc antenna tuner which is > popular for MARS ALE. > > I have also used it with the flex 5000 internal atu. > > A 9:1 balun is important when using ATUs with tuning range inferior to the > palstar at-auto which is now discontinued. > > I use this from 160m to 10m and everywhere inbetween. This is a popular > MARS antenna hung low for NVIS use. Thus antenna is also popular for MARS > ALE use. > > It sounds to me that those using multiple dipoles are behind the times. > You should read about the superior characteristics of a full wavelength > horizontal loop in the ARRL antenna book. > I also use a full-wave horizontal loop for multi-band use. Mine is 60m and up about 8m off the ground. It is a super NVIS antenna on 80m-30m and then it gets low-angle on 20m so it works well for DX too. The problem is that, while it is multi-band, it is only one band at a time. You have to retune when you change frequencies and it doesn't work well for receive when off the tuned frequency. Gerald was talking about how to use the concurrent multi-band receive in the new 6x00 series. For that you need a true broadband antenna. I am planning to experiment with the tilted, terminated, folded-dipole (T2FD) for that. A properly designed T2FD can cover the whole HF spectrum with good performance and no retuning. -- Brian Lloyd, WB6RQN/J79BPL 3191 Western Dr. Cameron Park, CA 95682 [email protected] +1.767.617.1365 (Dominica) +1.916.877.5067 (USA) _______________________________________________ Flexedge mailing list [email protected] http://mail.flex-radio.biz/mailman/listinfo/flexedge_flex-radio.biz This is the FlexRadio Systems e-mail Reflector called FlexEdge. It is used for posting topics related to SDR software development and experimentalist who are using beta versions of the software.
