Thanks everyone for the insightful conversation. I have learned a
tremendous amount by doing this antenna work with Joel, using AC6LA's
Excel spreadsheet tool to drive EZNEC, learning from the published
materials put up by Tom. It has tickled me pink to have the opportunity to
turn the stuff I learned from study into a practical result with Joel and I
was delighted with the mods W1MK suggested. What Joel and I did was not
perfect but it is an awesome performer nevertheless.
Another person I need thank personally is Mon General (John W2GD) for his
irascible inspirational desire to succeed on 160m and for involving me,
which led me directly to learning what Tom Rauch and others have done in
this area. I need to take all I've learned with the help of others and do
a version for John at Tuckerton.
Thanks to all
HY
On Wed, Feb 13, 2013 at 9:59 PM, Tim Duffy <k3lr@k3lr.com> wrote:
> Hi Rudy!
>
> The VE3DO phased pair works great on 80 and 40 meters as well. Even with
> the
> optimized spacing and feed for 160, the 80 and 40 meter stations here can
> use it and they love the way it works.
>
> 73,
> Tim K3LR
>
> -----Original Message-----
> From: Topband [mailto:topband-bounces@contesting.com] On Behalf Of Rudy
> Bakalov
> Sent: Wednesday, February 13, 2013 9:18 AM
> To: topband@contesting.com
> Subject: Re: Topband: New 160M high performance receiving antenna at W3LPL
>
> Hi Tim,
>
> This does look like a viable option. Too bad it is single-band and only
> bi-directional, although a star-like arrangement (with lots of relays)
> could
> work too.
>
>
> Rudy N2WQ
>
>
> ________________________________
> From: Tim Duffy <k3lr@k3lr.com>
> To: 'Rudy Bakalov' <r_bakalov@yahoo.com>; topband@contesting.com
> Sent: Wednesday, February 13, 2013 1:43 AM
> Subject: Re: Topband: New 160M high performance receiving antenna at W3LPL
>
> Hello Rudy,
>
> I am using a pair of VE3DO loops in a phased array for 160 meters. The two
> loops are spaced 5/8 wavelength (at 1830 KHz) apart at K3LR - aimed at
> 45/225 degrees (a DPDT relay selects the direction for each loop).
>
> The VE3DO loops are simple to construct and work very well. The in phase
> feed for the two loops is simple with equal lengths of 50 ohm coax to a T
> connector and a 25 to 50 ohm UNUN to match to the 50 ohm RX. The VSWR of
> the
> system is excellent with the 9:1 K9AY transformers at each loop feed point
> up thru 7 MHz. I suggest using a DX Engineering RPA-1 preamp operating at
> 16
> VDC to feed the receiver for best results.
>
> Details for the inexpensive VE3DO loop receive antenna is here:
>
> http://topbanddinner.com/page_presentations.html
>
> 73!
> Tim K3LR
>
> -----Original Message-----
> From: Topband [mailto:topband-bounces@contesting.com] On Behalf Of Rudy
> Bakalov
> Sent: Tuesday, February 12, 2013 12:00 PM
> To: topband@contesting.com
> Subject: Re: Topband: New 160M high performance receiving antenna at W3LPL
>
> I have been wondering if the antenna element in phased arrays could be a
> loop rather than a vertical. My thinking is that the loop has some level of
> directivity so phasing two of them should result in better side lobe
> suppression compared to a vertical. Is there any merit to this thought?
> Specifically, will I see better RDF numbers if I were to use loop elements
> in any of the active 8 and 4 circle systems (e.g., DX Engineering, Hi-Z
> Antennas, etc.)?
>
> Rudy N2WQ
> _________________
> Topband Reflector
>
> _________________
> Topband Reflector
> _________________
> Topband Reflector
>
> _________________
> Topband Reflector
>
--
Bob McGwier
Owner and Technical Director, Allied Communication, LLC
Facebook: N4HYBob
ARS: N4HY
_________________
Topband Reflector
|