Subject: Re: Legal Advice Re: TVI Date: Mon, 19 Jan 1998 23:39:34 +0000 From: VE3AX ve3ax@icom.ca Org: VE3ONT To: the.hiltner.family@sympatico.ca References: 1 Michael: I moved to the country 3 years ago for the very reason you talk of - preamplified TV's! I lived in Dunnville, about 15 minutes from here, where about 50% of the population had a preamplified TV either with the radome-type antenna, "bazooka" antenna, or the proverbial "black-box" under the TV antenna. One of the main criteria I had in choosing this property was checking those few neighbours that I have for preamps. There is one - a "black-box" - about 1500 ft away, but I discovered my next door neighbour 800 ft away had one in his basement next to the TV. He does get some interference on the weaker stations but I am running 1.5 kw and 4 x 13 db gain yagis on 2 meters right now and that's going to get bigger! I get NO TVI in my own house only 500 ft or so from the radio antenna. The key is the preamps - you HAVE to talk him out of them! There is NO other way in my experience of 29 years as a VHF'er that you will ever conquer the TVI problem unless your neighbour removes the preamps. His reception will suffer, true. But. he will be able to watch TV whenever he wants, even when you are on the air. You are wasting good money buying filters while he still has the preamps - don't forget they amplify EVERYTHING between 50 Mhz and 900 Mhz usually. I had one neighbour at least 1000 ft from me when I was in town that called and told me I was killing every channel - at the time I was running a 25 watt all-mode and a small yagi at 30 feet. I couldn't believe it but it was true. On jumpering out his Radio Shack preamp, the problem disappeared. Again the key is to get rid of the preamps. I know this is not easy but if you can't do that, everything else is futile! All you can then do is modify your operating time to the middle of the night - get those 17B2's up and go EME! Lots of good moontime in the middle of the night. As far as the rover phone goes, get rid pof his 49 Mhz unit and tell him, or buy him, a 900 Mhz unit. They are a lot less susceptible to VHF TVI unless you happen to have a Kw on 903 mhz! You will never operate 6 meters with a 49 Mhz rover phone in the area - at least not without phone interference. The DOC (or whatever its called these days) will tell him there's mothing they can do about the phones - he's out of luck on that - trouble is he's YOUR neighbour and YOU have to live next to him. Proceed with caution! Good luck! Wish I could have been on more this past weekend but a big project refinishing my basement takes priority. This year is the "year of the antennas". Have new arrays - all multiple yagis - for 6 meters to 2304 Mhz to go up on 4 new self-supporting towers. Going to be a busy year! I'll count my blessings if I can get 50 Mhz - 432 Mhz done in '98. Two new amps in progress too! 8938 for 432 Mhz and an 8877 for 50 Mhz. Good luck and keep me posted. -- 73, VE3AX (ex-VE3VD, VE3EMS) Peter Shilton FN02cw E-Mail to: VE3AX@icom.ca Snail Mail to: 215 Windecker Road, R.R. #1 Cayuga, Ontario, CANADA NĜA 1EĜ
