Those pager transmitter are pain,,,,,,,,as some says. we had a similar problem here some years ago,a telecom company installed a Big Motorola Micor there when installed suddently the radio-amateur received interference from it and even the municipality office radio too and they said "your are the problem" After intervention,letters,emails the Gov Agency came in the "discussion " and they appear that The pager company was transmitting at HIGHER POWER that it was suppose to be from their license.
i always known that when those transmitter when the are installed at a radio site (ofter in the 140 mhz),,,,,,,,,,,,many problems will occured BUT it always the competence of the tech that must be in consideration also. you always have for what you pay. 73/s all gervais ve2ckn . .. From: Jim in Waco WB5OXQ Sent: Saturday, August 07, 2010 5:07 PM To: [email protected] Subject: Re: [Repeater-Builder] Pager interference You may have to put a can on the pager transmitter. Pagers use square waves which are very rich in harmonics and need to be filtered at the source. This may be the only way to remove the problem. I speak from experience. Jim wb5oxq in Waco ----- Original Message ----- From: Dwayne To: [email protected] Sent: Saturday, August 07, 2010 1:38 PM Subject: [Repeater-Builder] Pager interference Hi, I've got a new pager issue that has come up on a tower where we have a VHF repeater. It's about 400 watts erp and 15 feet horizontal distance and 4.3 and 4.7 MHz away (it switches). I'm thinking of using one bp/br can that will have the notch wide enough to cover both channels and one pass can on our RX freq. I can also add more pass cans or something like the DCI window filter. The real question is where to these can go and in what order. We have a standard Q-202 duplexer that worked fine before the pager was put in. I'm thinking that the pager cans will go on the RX side of the duplexer, but does it matter if the pass goes on the duplexer side or the RX side of the bp/br can? I'm kinda thinking that it doesn't matter, but want to do it right in case it does. Dwayne Kincaid WD8OYG ------------------------------------------------------------------------------ No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.851 / Virus Database: 271.1.1/3056 - Release Date: 08/07/10 01:28:00
