2:1 match? How?

[HomerBB]

You're right, my bad. I've used Q sections several times with quads and delta loops with good results.

Whatcha buildin', Homer?

Rick

I built a two element quad. I did go with the 75 ohm Q section and have had good results.

The project was discussed herehttp://www.worldwidedx.com/cb-antennas/34020-2-element-quad.html

 

[RickC.]

I built a two element quad. I did go with the 75 ohm Q section and have had good results.

The project was discussed herehttp://www.worldwidedx.com/cb-antennas/34020-2-element-quad.html

Ah, OK. I posted on that thread, I thought maybe this was something new you were doing. Yep, the 75 ohm Q section does work well with the spacing that gives 100-125 ohm feedpoint impedance. You can build a 2 ele DE/REF quad to give a good direct match to 50 ohms, you know. I forget what spacing needs to be used- .125 wl I think, but I'd have to look it up.

The 20 meter j-pole is doing well, by the way. I'm Jones'n for more gain again though. The house is getting a new roof later this month, will decide what to put up after that.

Rick

 

[straight razor]

i didnt read the whole questions if its for hf freq or cb why dont you u feed the quad with a balun, Cubix - manufacturing computers in the US since 1975 should have what u need to get the job done.

 

[Beetle]

I have a five-band, 2 element quad. I run a single RG-213 from the shack, up the tower and to a remote coax switch. From the switch there are five RG-11 matching sections: 1/4 wavelength for 20/17/15 and 3/4 wavelength for 12/10 (one quarter wavelength would be too short to allow free rotation of the antenna on these bands).

Works just fine.

I bought one of Cubex' matching transformers when I originally built the quad, but it was either defective or just a joke. It couldn't take the full 100 watts from my rig (!) so I came up with the remote coax switch idea. Got a refund from Cubex, though.

I bought the boom-to-mast clamps and the spiders from Cubex as well, but I used heavy surfcasting rod blanks that were considered defective for cosmetic reasons (that's fine - they're fifty feet in the air and nobody can see the "problems").

 

[freecell]

"Is there an easily made, non ferrite cored balun or other system that will match down from 100 to 50 ohms, that is, a 2:1 match?"

yeah, a 75 ohm 1/4 wave matching section, any number of odd electrical quarter waves in length.

 

[mackmobile43]

"Is there an easily made, non ferrite cored balun or other system that will match down from 100 to 50 ohms, that is, a 2:1 match?"

yeah, a 75 ohm 1/4 wave matching section, any number of odd electrical quarter waves in length.

Is that the same thing Jazzsinger is referring too?