On (17 Jun 97  06:53:06) Jeff Edmonson wrote to Larry Kunz ...
JE> A DB-224 has 4 elements, and as I remember they are all fed
JE> simultaneously, meaning that the Z would be somewhere around 12.5 ohms,
JE> per.
The four is easy, just build and tune each to 50 ohms, then feed
everything with 3/4 wave lines made from RG/11.
JE> As for that 8el thing, I would suggest maybe getting a technical
JE> description for Decible Products, or another antenna manufacturing place
JE> - perhaps there's something on the 'Net?
My problem is with the design of the DB elements. Kinda like a
mono-pole, but with a 'loop' under it. Looks like a regular folded
dipole, but shorted at the center for one half. The other half is
fed like you would expect. The 'Z' of this mess is based on tubing
dia vs freq and loop spacing -- at least I think.
Larry
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