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Ramsey Electronics LPY915 manual

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Table of contents for the manual

  • Page 1

    LPY 2 • 1 THE ‘ LOGI’ LOG PERIODIC ANTENNA Ramsey Electronics Model No. LPY915 Constructed on rugged FR -4 material, it requires no tuning an d has no fragile antenna elements to break or twist! Covers the entire 900 to over 2,500 MH z frequency range. Why settle for any old antenna… th is little baby “compresses” the signal into a powe[...]

  • Page 2

    LPY 2 • 2 RA M SEY T RA N SMIT T ER KIT S • FM100B Professional FM Stereo Transmi tter • FM25B S yn thesiz ed Stereo FM Transmitter • MR6 Model Rocket Track ing Transmitter • TV6 Television Tra nsmitter RAMSE Y RECEI VER KITS • FR1 FM Broa dcast Receiver • AR1 A ircraft Band Recei ver • SR2 Shortwa v e Receiver • SC1 Shortwav e Co[...]

  • Page 3

    LPY 2 • 3 Ramsey Publica tion No. MLPY91 5 Price $5.00 TABLE OF CONTENTS Introduction ... .............................. 4 Antenna Descrip tion ................... 4 Standard Hook-up ...................... 5 Low Frequency Modification ....... 7 Buildi ng a C orner Re f lecto r ......... 7 Buildi ng a R eflec tor Gri d ............. 9 LPY 915 Retu[...]

  • Page 4

    LPY 2 • 4 INTR ODU CTI ON This small log periodic antenna, which we call the ‘ Logi’, is ideal for getting the maximum performance out of any UHF to lo w frequency microwave wireless system. Its directional pr operties “com pres ses” the signal into a powerful beam that is 4 times more powerful in the desired direction. It is the ideal an[...]

  • Page 5

    LPY 2 • 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 w iring configuration is simply to use the Logi as the co mplete antenna and merely add a means of connection for your radio. T he easiest method to inter f ace your antenna and ra[...]

  • Page 6

    LPY 2 • 6  7. From the bottom side, slide the cent er cond uctor of the coax through the open via at the front of the circuit board.  8. Gently bend the remaining cabl e to mount flush along the tinned center ground strip.  9. Look closely at the ground conductor and make sure there are no stray braid wires hanging around. They can short[...]

  • Page 7

    LPY 2 • 7 high frequency end. BUILDING A CORNER REFLEC TOR Corner reflector ante nnas have long be en used by the Military and Radio Amateurs for high forward gain applications like field data links. Using a prop erly sized 90 ° angle corn er refl ector will typically give you a 10 dB gain or higher over that of a stand alone dipo le antenna. T [...]

  • Page 8

    LPY 2 • 8 parallel with th e seam, the antenna will not function properl y . The boom length that positions the Logi at th e f ocal point of the reflector is also critical factor. This will require a bit of trial a nd error to get things just right. Use a piece of PVC pipe (1/2” to 7/ 8” will work well) with a slot cut in the end just big eno[...]

  • Page 9

    LPY 2 • 9 experimented with the I SM19R and ISM24R and found th at the y w ork wonderfully with the Logi! Look at the how the B oss used a piece of PVC and a f ew couplers to f orm a boom. He cu t a slot in one end of the PVC pip e to hold the Logi antenna in place. Then he used a nylon wire tie at the end of the boom to squeeze the slotted pipe [...]

  • Page 10

    LPY 2 • 10 LPY915 RETURN LOSS PLOT Return Lo ss (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 2.615 17.0 1.329 35.0 1.036 8.0 2.323 18.0 1.288 [...]

  • Page 11

    LPY 2 • 11 The Ramsey Kit Warra nty Please read carefully BEFORE calling or writing in about your kit. Most problems can be solved wit hout contacting the factory. Notice that this is not a "f ine print" warranty. W e want you to understand your rights and ours too! All Ramsey kits will work if assembled properly. T he very fact that yo[...]

  • Page 12

    LPY 2 • 12 Price: $5.00 Ramsey Publica tion No. MLPY915 Assembly and Instruction manual for: RAMS EY MO DEL NO . LP Y915 RAMSEY ELECTRONICS, INC. 590 Fishers Station Drive Victor, New York 14564 Phone (585) 924-4560 Fax (585) 924-45 55 www.ramseykits.com REQUIRED TOOLS • Soldering Iron Ramsey WLC-100, • Thin Rosin Core Solder Ramsey RTS12 •[...]