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Cushcraft
Amateur Radio Antennas
LFA-440M10EL
10 Element Loop Feed Beam
For 440 Mhz
INSTRUCTION MANUAL
CAUTION: Read All Instructions Before Operating Equipment
Cushcraft
Amateur Radio Antennas
308 Industrial Park Road
Starkville, MS 39759 USA
Tel: 662-323-9538 Fax: 662-323-6551
VERSION 1A
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Summary of Contents for CUSHCRAFT LFA-440M10EL
- Page 1 Cushcraft Amateur Radio Antennas LFA-440M10EL 10 Element Loop Feed Beam For 440 Mhz INSTRUCTION MANUAL CAUTION: Read All Instructions Before Operating Equipment Cushcraft Amateur Radio Antennas 308 Industrial Park Road Starkville, MS 39759 USA Tel: 662-323-9538 Fax: 662-323-6551 VERSION 1A...
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Page 2: General Description
GENERAL DESCRIPTION The LFA (Loop Fed Array) Low-Noise Yagi is very different from the traditional dipole fed Yagi in many ways with its primary benefit being unwanted noise rejection. The LFA has a rectangular shaped, full wave loop driven element that is laid flat on the boom between and in-line with the parasitic elements . Then there is the way in which the loop functions. -
Page 3: Antenna Assembly
ANTENNA ASSEMBLY Rear of antenna Select the boom and identify the front and rear. The rear of the antenna where the mast bracket is, does not have any holes. Assemble the driven element first. Locate the parts listed below 2nd hole from rear Longer bolt and assemble as shown on the boom. - Page 4 Install End Caps Hose Clamp 4 places Slide the loop ends into the tubes. Put a #4 hose clamp over each tube before inserting the loop end. Do not tighten the hose clamps. the loop ends will need to move for tuning.
- Page 5 INSTAL THE ELEMENTS Identifying the elements is easy using the resistor color code. Install them on the boom in the proper location using the half BROWN washer, saddle and 8-32 x 2 inch bolts nuts and lock washers. D8 is longer than D7, this is on purpose. 8-32 x 2 half washer ORANGE...
- Page 6 MAST BRACKET ASSEMBLY Attach the mast bracket as shown. Make sure the elements are orientated correctly before tightening the 1/4-20 bolts. 5/16 NUT, WASHER 1/4-20 NUT, WASHER BOOM 1/4-20 X 3/4 U-BOLT 385144-1 385142-1 Attach the coax pigtail to the feed loop using the remaining 8-32 nuts and lock washers. Make the distance of the exposed conductors as short as possible.
- Page 7 Move out to shift frequency down. Move in to shift frequency up. Move both sides equally at the same time. Tuning Your antenna is now ready for tuning. Remove it from your assembly area and mount it on a temporary mast at least 8 feet off the ground.
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