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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 “compresses” 
the 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 from 900 to over 2,000 MHz! 

VSWR less than 2:1 - great for transmitters up to 10 Watts! 

Easily mounted by itself or makes a great feed for reflector 
dishes 

Construction ideas for a wideband corner reflector and a 
‘grid’ reflector dish are covered in the manual! 

Very directional - ideal for point-to-point links 

Summary of Contents for The `Logi' Log Periodic Antenna LPY915

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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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