--- In [email protected], [EMAIL PROTECTED] wrote: > > At 2/12/2007 09:45, you wrote: > > >Hi, > > from the experiments carried out here in the U.K. on in-band and > > cross-band portable and mobile repeaters vertical separation is > > nowhere near as good as horizontal.This also offers the chance > > to get the recieve antenna in a "null" from the transmitter. > > I assume you got your "horizontal" & "vertical" reversed in the above > statement, otherwise we're in for some spirited debate. > > Bob NO6B > Hi Bob, you have a very valid point but for portable "lash-up" which has to be man-portable to remote points i.e. post crash at Lockerbie (Flight 103) it has to be lightweight and only horizontal separation is viable.Also the authorities in the U.K. are not as liberal as the F.C.C. is where you are,and since money for kit is in short supply we have to use our day-to-day radios with the add-on interface units (look up CAIRO radio interface on the web) you can imagine the horrors that can result.We just have to engineer our way out of it,if you look up that web-site it will explain the philosophy much better than I can but it will also explain why in emergency service for us here accross the pond it has to be horizontal.
Regards Adam (G8UMX)
