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echo: ham_tech
to: IVY IVERSON
from: JEFF EDMONSON
date: 1997-09-29 13:14:00
subject: High Gain Antennas for 2M

 >  JE> You see my message to Stan on Quagi's?  Why not 4 J-poles (two 
riven,
 >  JE> opposite of each other) two reflectors (same configuration) and yagi
 >  JE> directors?  Put the whole thing on a 20' wooden boom...
 >  II> Nope, missed that one.  Sounds interesting.
 >  JE> It's been pointed out, it might be a bit cumbersome...  but a pair of
 >  JE> 5/8  elements as DEs and yagi directors does sound reminiscent of a
 >  JE> Quagi.
 > Hmmm... Not quite what I had in mind, but it might be quite workable.
 > I am more interested in something new that isn't in all the books,
 > which hopefully will have advantages, (like gain and/or directivity),
 > over the standard designs.  IOW, just experimenting with something
 > different to see how it compares.  If it works, great!  If it
 > doesn't, try somethng else.   :-}
True.  However, doesn't a 5/8 wave posses some gain over a quad element?
for better front-to-back, it's been suggested (and even commercially sold) to 
add a reflector at the end of the boom, with a 50ohm resistor across the 
elements.  A 'dummy-load' to signals from the back side of the beam, and at 
power levels on 2m such as most commonly 50w, it shouldn't be too hard to 
find or build a 50ohm load out of several 1w resistors in series/parallel for 
that power level.
   73 = Best Regards
   -Jeff KA5THB
   ka5thb@bigfoot.com
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