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  4. The `Logi' Log Periodic Antenna LPY915
  5. Assembly And Instruction Manual

Ramsey Electronics The `Logi' Log Periodic Antenna LPY915 Assembly And Instruction Manual

Manual is about: LOG PERIODIC ANTENNA

Summary of The `Logi' Log Periodic Antenna LPY915

  • Page 1

    Lpy2 • 1 the ‘logi’ log periodic antenna ramsey electronics model no. Lpy915 constructed on rugged fr-4 material, it requires no tuning and has no fragile antenna elements to break or twist! Covers the entire 900 to over 2,500 mhz frequency range. Why settle for any old antenna… this little baby “co...

  • Page 2

    Lpy2 • 2 ramsey transmitter kits • fm100b professional fm stereo transmitter • fm25b synthesized stereo fm transmitter • mr6 model rocket tracking transmitter • tv6 television transmitter ramsey receiver kits • fr1 fm broadcast receiver • ar1 aircraft band receiver • sr2 shortwave receiver • sc1 sho...

  • Page 3: Table of Contents

    Lpy2 • 3 ramsey publication no. Mlpy915 price $5.00 table of contents introduction ................................. 4 antenna description ................... 4 standard hook-up ...................... 5 low frequency modification ....... 7 building a corner reflector ......... 7 building a reflector...

  • Page 4

    Lpy2 • 4 introduction this small log periodic antenna, which we call the ‘logi’, is ideal for getting the maximum performance out of any uhf to low frequency microwave wireless system. Its directional properties “compresses” the signal into a powerful beam that is 4 times more powerful in the desire...

  • Page 5

    Lpy2 • 5 standard hook-up normal applications are well suited by the default performance of the unit without the need for cumbersome reflective elements. The standard wiring configuration is simply to use the logi as the complete antenna and merely add a means of connection for your radio. The easie...

  • Page 6

    Lpy2 • 6 7. From the bottom side, slide the center conductor of the coax through the open via at the front of the circuit board. 8. Gently bend the remaining cable to mount flush along the tinned center ground strip. 9. Look closely at the ground conductor and make sure there are no stray braid wire...

  • Page 7

    Lpy2 • 7 high frequency end. Building a corner reflector corner reflector antennas have long been used by the military and radio amateurs for high forward gain applications like field data links. Using a properly sized 90 ° angle corner reflector will typically give you a 10 db gain or higher over t...

  • Page 8: 90° Corner Reflector

    Lpy2 • 8 parallel with the seam, the antenna will not function properly. The boom length that positions the logi at the focal point of the reflector is also critical factor. This will require a bit of trial and error to get things just right. Use a piece of pvc pipe (1/2” to 7/8” will work well) wit...

  • Page 9

    Lpy2 • 9 experimented with the ism19r and ism24r and found that they work wonderfully with the logi! Look at the how the boss used a piece of pvc and a few couplers to form a boom. He cut a slot in one end of the pvc pipe to hold the logi antenna in place. Then he used a nylon wire tie at the end of...

  • Page 10

    Lpy2 • 10 lpy915 return loss plot return loss (db) vswr return loss (db) vswr return loss (db) vswr 1.0 17.391 11.0 1.785 21.0 1.196 2.0 8.724 12.0 1.671 22.0 1.173 3.0 5.848 13.0 1.577 23.0 1.152 4.0 4.419 14.0 1.499 24.0 1.135 5.0 3.570 15.0 1.433 25.0 1.119 6.0 3.010 16.0 1.377 30.0 1.065 7.0 2.6...

  • Page 11

    Lpy2 • 11 the ramsey kit warranty please read carefully before calling or writing in about your kit. Most problems can be solved without contacting the factory. Notice that this is not a "fine print" warranty. We want you to understand your rights and ours too! All ramsey kits will work if assembled...

  • Page 12: Ramsey Model No. Lpy915

    Lpy2 • 12 price: $5.00 ramsey publication no. Mlpy915 assembly and instruction manual for: ramsey model no. Lpy915 ramsey electronics, inc. 590 fishers station drive victor, new york 14564 phone (585) 924-4560 fax (585) 924-4555 www.Ramseykits.Com required tools • soldering iron ramsey wlc-100, • th...