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THE AM BULLETIN BOARD => Technical Forum => Topic started by: WA2SQQ on November 14, 2017, 01:44:43 PM



Title: Double Bazooka Inverted L ?
Post by: WA2SQQ on November 14, 2017, 01:44:43 PM
I cam across an ad for a company selling a "double bazooka inverted L" antenna. I know what a double bazooka is and I know what an Inverted L is. Ran a Google search and everything seems to indirectly reference this IAC antenna. Anyone have a clue how they've combined the two designs?


Title: Re: Double Bazooka Inverted L ?
Post by: kb3ouk on November 14, 2017, 04:22:37 PM
I saw that and it looked to me like just one side of a double bazooka dipole, now how they feed it i have no clue. All i know is a double bazooka sucks, they're supposed to be quieter than a normal dipole but i have a dipole up now fed with open wire line that is much quieter.


Title: Re: Double Bazooka Inverted L ?
Post by: Steve - K4HX on November 14, 2017, 09:53:08 PM
I love these whacky names for antennas. Double Bazooka?? Does it BLAST out RF waves? Or does it give you a KILLER signal?

It's a dipole made out of coax (a bad idea). But that doesn't sound cool.  ::)



Title: Re: Double Bazooka Inverted L ?
Post by: KB2WIG on November 15, 2017, 10:56:03 AM

It blows big bubbles and is easy to chew.


KLC


Title: Re: Double Bazooka Inverted L ?
Post by: KA0HCP on November 15, 2017, 11:31:00 AM
How about a Double Yagi Inverted L! ;)


Title: Re: Double Bazooka Inverted L ?
Post by: W2PFY on November 15, 2017, 04:27:26 PM
How about an oil filled 2 inch copper pipe loop designed for 75 meters? The oil in the pipe would keep the loop cooler in the summer and warmer in the winter depending if it were shaded or in open air. A plastic pipe to an oil heater with a circular pump could keep it at a constant temperature or you could crank it up and be able to brag about a HOT antenna! Just saying?? 


Title: Re: Double Bazooka Inverted L ?
Post by: KzeroCOM on November 28, 2017, 11:24:28 PM
I bought one from them for 80 meters.  The antenna is made from a combination of a driven coaxial element and a tuned stub at the far end. At the feedpoint the outside braid is fed and the inside conductor is ground.  The coaxial element is then shorted at the far end and a tuning stub is attached.  The IAC uses RG8X for the driven element and heavy duty 300 ohm for the tuned stub.  I put it up as recommended.  It's working OK.  It's fairly wide banded.  seems to work DX much better than local stuff.  I had one of their dipoles up for years of this design and it also worked very well. 
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