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LPY2 

 2  

 
 
 
 

RAMSEY TRANSMITTER KITS 
       

• 

FM100B Professional FM Stereo Transmitter 

       

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FM25B Synthesized Stereo FM Transmitter 

       

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MR6 Model Rocket Tracking Transmitter 

         • 

TV6 Television Transmitter  

 
RAMSEY RECEIVER KITS 
       

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FR1 FM Broadcast Receiver 

       

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AR1 Aircraft Band Receiver 

       

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SR2 Shortwave Receiver 

       

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SC1 Shortwave Converter 

 
RAMSEY HOBBY KITS 
       

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SG7 Personal Speed Radar 

       

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SS70A Speech Scrambler 

       

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BS1 “Bullshooter” Digital Voice Storage Unit 

       

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AVS10 Automatic Sequential Video Switcher 

       

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WCT20 Cable Wizard Cable Tracer 

       

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LABC1 Lead Acid Battery Charger 

       

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ECG1 Electrocardiogram Heart Monitor 

       

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LC1 Inductance-Capacitance Meter 

 
RAMSEY AMATEUR RADIO KITS 
       

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DDF1 Doppler Direction Finder 

       

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HR Series HF All Mode Receivers 

       

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QRP Series HF CW Transmitters 

       

• 

CW7 CW Keyer 

       

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CPO3 Code Practice Oscillator 

       

• 

QRP Power Amplifiers 

 
RAMSEY MINI-KITS 
Many other kits are available for hobby, school, Scouts and just plain FUN. New 
kits are always under development. Write or call for our free Ramsey catalog.    

 
 

LPY915 INSTRUCTION MANUAL 

Ramsey Electronics publication No. MLPY2 Rev 1.1 

First printing: December 2001

 

 

 
COPYRIGHT  2001 by Ramsey Electronics, Inc. 590 Fishers Station Drive, Victor, New York 
14564. All rights reserved. No portion of this publication may be copied or duplicated without the 
written permission of Ramsey Electronics, Inc. Printed in the United States of America.

 

Содержание The `Logi' Log Periodic Antenna LPY915

Страница 1: ...signal into a powerful beam that is 4 times more powerful in the direction you desire Easy hookup to your Receiver or Transmitter Small thin size with excellent broadband performance Solid 6 dB gain...

Страница 2: ...C1 Inductance Capacitance Meter RAMSEY AMATEUR RADIO KITS DDF1 Doppler Direction Finder HR Series HF All Mode Receivers QRP Series HF CW Transmitters CW7 CW Keyer CPO3 Code Practice Oscillator QRP Pow...

Страница 3: ...y Modification 7 Building a Corner Reflector 7 Building a Reflector Grid 9 LPY915 Return Loss Plot 10 Return Loss vs VSWR Chart 10 Warranty 11 KIT ASSEMBLY AND INSTRUCTION MANUAL FOR RAMSEY ELECTRONIC...

Страница 4: ...put impedances and good VSWR characteristics While the log periodic design has been around since the late 1950 s it has now been discovered to be at the cutting edge of antenna development Looking at...

Страница 5: ...the protective solder mask coating on the bottom side center ground trace with a razor Only remove the mask along the center trace not the perpendicular elements Be careful not to accidentally cut the...

Страница 6: ...it passes through the via 12 Visually examine the junction you just soldered and again make sure the center feed of the coax is not shorted to ground Note that using an ohmeter to check you LPY915 an...

Страница 7: ...as the main element versus a simple dipole The following diagram gives a few basic dimensions for an experimental corner reflector The main points to key in on are the base reflector size and the ele...

Страница 8: ...e vertex of the reflector to allow you to slide the boom in and out while testing Once the optimal position of the Logi is set tighten the coupler and your ready to go BUILDING A REFLECTOR GRID Buildi...

Страница 9: ...nylon wire tie at the end of the boom to squeeze the slotted pipe like a vise Wow Simple to make and highly effective If you plan to do the same here is a quick shopping list 1 Ramsey ISM19R or ISM24...

Страница 10: ...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 40 0 1 020 9 0 2 100 19 0 1 253 50 0 1 006 10 0 1 925 20 0 1 222 60 0 1 002 RETURN LOSS VERSUS VSWR CONVERSION CHART The LPY2 o...

Страница 11: ...be assured that the 1K ohm resistors are actually the missing 10 K parts Hum m m I guess the red band really does look orange Ramsey Electronics project kits are packed with pride in the USA If you b...

Страница 12: ...amsey RTS05 Small Diagonal Cutters Ramsey RTS04 OR Complete Soldering Tool Set RS64 2801 ADDITIONAL SUGGESTED ITEMS Optivisor Magnifier Headband Ramsey OPMAG Holder for PC Board Parts Ramsey RTS13 Des...

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