When I started searching for practical antennas for my restricted HOA apartment community the Magnetic Loop was a clear choice. However most commercial magnetic loop antennas are for low power operation or QRP. I ended with a design of my own and have had so much fun, that thought it may benefit other HAMS with similar needs, so decided to advertise it in Gear made by Hams. The antenna is light, portable, serviceable, handles a tremendous amount of power, high Q rejects some interference, and is capable of detecting some weak signals. The High power magnetic loop handles 100W PEP easily. (Model SML-1000-1) Magnetic Loop Antenna Parts/Assembly video: SML-1000-1 (sorry, no music) Picture Shown with Active loop down. It can easily be reconfigured for Active loop Up I designed this antenna to be easily serviceable and made from commonly available materials, so that you could enjoy a robust and solid performing antenna that allows Dx to the far places of the world on a minimal footprint, portable, light configuration, discrete form and reasonable power handling. Currently with 100W PEP , rain or shine, I routinely make contact with HAMS across the USA and other countries in South America and Europe.With the SML-1000-1 QRP is optional. Interestingly, even tough we are geographically located at the tip of the Florida peninsula, with the antenna in a north-south orientation, reaching to Texas, California to the west and Spain and Italy to the East has been normally achieved. And as a matter of normal course the states directly to the north all the way to Canada and to the south Puerto Rico, Venezuela & Brazil. This on 20 and 40 mts. The current tested rig is a YAESU 857D + MFJ-939 automatic antenna tuner. The Yaesu maximum power output is 100 watts PEP on SSB HF. TUNING PROCESS The process of tuning the antenna for Dx is straight forward and is as follows: 1.- Turn OFF the auto-tuner and choose the desired frequency on the Transceiver. 2.- Turn on the volume on the transceiver and turn over the capacitor on the antenna and find the spot where maximum noise is heard. 3.- Turn on the auto tuner and proceed to auto tune the antenna. This process usually results in a 1:1 swr or very close to it. After this tuning process, when you search for other stations to Dx, you do not need to perform auto tune until you are ready to transmit on a chosen frequency. Once the frequency is chosen, you press auto tune and get your SWR down to 1:1 or very close to it. Then transmit. (If the auto tune does not tune satisfactorily after a frequency change, go back to No.1 above and repeat.) Usually the big capacitor on the antenna will have to be moved two or three times only to cover the entire band. And only an arc of one or two 1/16 of an inch on the 4 inch diameter turning knob!. (The combination tested is YAESU 857D + MFJ-939 Automatic tuner. NOT INCLUDED ) EXPERIMENTATION This antenna design lends itself to experimental applications if you are so inclined. For example, you may want to change the diameter of the radiant loop or the diameter of the tube forming the loop. Or the material of the radiant loop. Or double up a large loop for operation on 160 Mts. Also you can also play with the plane of the loop, vertical or by relocating some portions of the PVC, lay it on a table and have a horizontal polarization. Or maybe you would like to compare the propagation differences between active loop up or down. Which can be made by adding a pvc coupling and a pipe extension to the top to provide support for the newly reconfigured radiant loop. I hope you find this information interesting. The High power SML-1000 MAGNETIC LOOP Antenna only PRICE is $145.00 Plus shipping. Shipped USPS to any of the contiguous states of the Continental USA. What you get for $145.00 plus shipping: 1.-VARIABLE CAPACITOR: Fully assembled ready to use High voltage air core variable capacitor. ( Aluminum Fins & Zinc plated steel rods and nuts) 2.-RADIANT LOOPS: Qty (1) carefully coiled 38" Diameter and Qty (1) 24" Diameter 3/8 Diameter copper Radiant loops 3.-ACTIVE LOOPS: Qty (1) 7"Diameter 3/4 wide Aluminum plate and Qty (1) 5"Diameter 3/4 wide Aluminum 4.-Coaxial Wire (Coaxial Wire is for limited time only JULY 2017!) Qty (1) 33 Ft 50 Ohm Coaxial wire with PL 259 male connector for the radio and Caiman Clamps for the active loop. 5.- PVC Frame: PVC frame with Qty (10) 3/4 PVC T joint and Aprox. 14 Ft of 3/4 PVC pipe cut in several segments. Qty (10) 6 inch electrical nylon ties. 6.- Instructions: Assembly and use instructions. YOU MUST USE AN AUTOMATIC ANTENNA TUNER. NOT INCLUDED. (The combination tested is YAESU 857D + MFJ-939 Automatic tuner.) TERMS: a. Cash in Advance. We currently accept Money orders or personal checks. b. Estimated shipping is 5 Days after reception of payment if by personal check. c. Orders are final. No returns accepted after antenna is shipped. d. Antenna is custom built. If you need any additional features or only parts please contact us for additional or reduced pricing. f. We reserve the right to make any modification to improve the design. e. User assumes all responsibility for use of this antenna and fitness of purpose. Please contact me: KX4CY@arrl.net prior to mailing (Sending) any confirmed order or payment. We need to send you a confirmed Fedex ground estimate to your zip code and you must attach your signed purchase order with your payment. All the best and happy DX. KX4CY 73!