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Author Topic: Hidden & Attic antennas...  (Read 25303 times)
KF7CG
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Posts: 875




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« Reply #30 on: June 25, 2014, 03:24:10 AM »

Remember to run QRP! When the RFI happens, the witch hunt begins!

No callsign license plate, no jackets with Amateur Radio patches or words, no strange antennas on car.

KF7CG
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N1DVJ
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Posts: 530




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« Reply #31 on: June 25, 2014, 06:01:41 AM »

Remember the pole lamp? popular in the 60's.
OK, they used to make a CB antenna that looked just like it.
It was called a helix dipole.  Essentially it looked like a 'spring' inside the pole, only with compressed sections at either end, I assume to help tune it at manufacture.  I can't remember if it was center fed or tap fed at one end at a coil.  RS sold one in the 70s, about $40 if I remember right.  Worked better than the back of set CB antennas.  MAYBE a bit better than a regular 40" or so auto mag mount on top of your fridge, but most people couldn't fit a mag mount on top of their fridge, except for those little pieces of junk flexible ones. 

The was a ham antenna built on a single piece of PCV back then.  I forget who and what it was called, but I seem to remember it wasn't a dipole.  It had to be mounted over a ground plane or radials of some kind.  I guess the intent was to stand this in a room with radials under the carpet.  The anenna was just over 6 feet tall and it looked like a coil on a 2" or less PCV pipe.  It had multiple 'sections'.  That is, there was about an inch or so of tight wound, then about 6 or 8 inches of loose, maybe 1 turn per inch, then another inch of close wound, then another 8 inches of loose, and so on.  I saw the thing, but never got to use it..
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