Love it! A deceptively simple antenna, Chuck, but it works great. Flag variations are so versatile. I hope you catch some good WCNA DX with it!
73, Guy On Feb 5, 2017 7:13 AM, "Charles Rippel" <lantarea...@gmail.com> wrote: > Hi all, > > Been working on a Superloop MW antenna which I can manually slew. It's > been a project for the past couple weekends (building/staining the wooden > supports, mainly) and completed it yesterday, the 4th. Its dimensions are > 36 X 16' and is constructed so that I can physically move one end of the > antenna to have the array favor NW, S or heading of choice. The antenna is > fed with 75 ohm RG-6 quad shield bought at the Home Depot for $43 / 500' > and a packet of quad-shield "F connectors. > > http://www.homedepot.com/p/Southwire-500-ft-Black-RG6U- > Quad-Shield-Coaxial-Cable-56918445/202316309 > > Instead of installing a fixed value resistor in one corner, I went one > step further and for the purpose of tuning the null, built a fixture which > holds a 2K, non-inductive variable resistor to take the place of the fixed > resistor network. The variable resistor can be adjusted for the best null, > removed, then the value read with a DVM which provides a value for a fixed, > more easily weatherproofed, CARBON FILM resistor network to be inserted in > place of the variable resistor. With the loop "looking" generally west, I > used a C-Crane Skywave, which had been modified by removing the internal > ferrite bar and an external MW antenna input added Tuned the radio to > WCBS 880, about 300 miles up the coast, then connected the Skywave radio to > the loop feed-point with a cable long enough to reach back to the tuning > resistor end of the loop. Adjusted the variable pot for the best null of > WCBS which is generally off the back of the antenna The adjustments took > place at approximately 3PM; both the station and my location were still > in daylight. > > Frankly, I was amazed at the results. By adjusting the resistor, (the > final value was 371 ohms) the loop would nearly completely null WCBS which > gave way to a station with a latin format on the frequency. In winter, > WCBS can be heard here on a 24/7 basis at approximately the "S-9" level. > > I detuned everything, grabbed my iPhone, went through the process a second > time and recorded a short video, linked below. > > https://youtu.be/ugLKjTuncsw > > Next step is to review Mark Durenberger's, "Field Information on the > Double D-Kaz Antenna" which has details on moving the nulling pot inside > along with a couple articles on suppressing common mode pickup. Who knows, > I have 2 supports; this may turn into a D-KAZ v/s the Superloop. It also > comes apart and is compact enough to go in the back of a pickup for a trip > to False Cape State Park, south of Virginia Beach, VA for some seaside > magic. > > Chuck Rippel > Chesapeake, VA > > On Thu, Feb 2, 2017 at 2:01 AM, 'Steve Francis' via MWDX < > m...@googlegroups.com> wrote: > >> 1290 WNBN Meridian MS >> >> 1-31 0059 EST >> >> Good with spots for Tax Time Check Cashing and Ted's Alternator and >> Starter, including locations and phone numbers; into old school R&B tune by >> Candi Staton. No ID heard - long live local ads! >> >> Steve Francis >> Alcoa, Tennessee >> >> Realistic TRF >> Select-a-tenna >> >> -- >> >> --- >> You received this message because you are subscribed to the Google Groups >> "MWDX" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to mwdx+unsubscr...@googlegroups.com. >> To post to this group, send email to m...@googlegroups.com. >> For more options, visit https://groups.google.com/d/optout. >> > > _______________________________________________ IRCA mailing list IRCA@hard-core-dx.com http://montreal.kotalampi.com/mailman/listinfo/irca Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers For more information: http://www.ircaonline.org To Post a message: irca@hard-core-dx.com
