--- In [email protected], "Steve Bosshard \(NU5D\)" <[EMAIL PROTECTED]> wrote: > > Well I have gone back to Decibel catalogue 23. Older books discarded. I am > pretty sure that at one time the DB224 was rated at 4.5 dBd, and then later > at 6 dBd., but this is from memory, I can't find an older catalogue.
I have gone back to catalog 14 (early 70s I believe) and it is rated at 6/9dbd, same as today. > > Regarding a clean and shiny antenna, we had a discussion at coffee. The > preposition was that radio waves and light have many similarities, ie., > wavelength, reflection, Fresnel behavior, and so forth. Using these > similarities, a mirror reflects light, and a dark surface absorbs light, > sooooooooooooooooo, wouldn't a shiny antenna reflect incoming signals while > a dark colored antenna absorbs signals? This may only apply to receiving > antennas - hope I can get this idea to market before the April 1 edition of > QST.. .... .. .... .. de nu5d Compare a Telewave (black) and DB (shiny) :~) . If shiny turns out to be better, there may be a market out there for special <aluminum burnishing> steel wool. Laryn K8TVZ
