Unless you pay very careful attention to the indoor antenna type and location you might easily receive a visit from the IMD Gremlin. Many types of 1/4 wave antennas in the mentioned situation can and do become very problematic sources. s.
> "Ray Brown" <[EMAIL PROTECTED]> wrote: > Hi, Jim... I'm trying to do the same thing, to cover the interior of a 6-floor building > with a LMR VHF repeater, and I tried suggesting a 1/4 wave mounted upside down > as you suggested, and the Motorola guy scratched his head and said "WTHeck?" > He was still trying to sell me a DB224 to cover the inside of the building. :-( > > Thanks for the confirmation! > > _Ray_ KBØSTN > > ----- Original Message ----- > From: Jim Brown > To: Repeater-Builder@yahoogroups.com > Sent: Monday, October 29, 2007 11:22 AM > Subject: Re: [Repeater-Builder] KENWOOD TKR 750 Installation and problems-HELP!! > > > One suggestion is to go to a simple ground plane antenna, and mount it upside down on top of your terminal building. The gain in an antenna will concentrate the radiation out on the horizon, which is not what you want. The upside down ground plane with no gain might be your best bet to have local coverage and have coverage directly beneith the antenna. > > 73 - Jim W5ZIT >
