Chris,
Assuming this is for a ham repeater and not commercial. Have the user bring his radio to you and tune it so that he not over deviated. I had to do this to a club guy here in Colorado. Mike Mike Mullarkey K7PFJ 6886 Sage Ave Firestone, Co 80504 303-954-9695 Home 303-954-9693 Home Office & Fax 303-718-8052 Cellular From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Mike Morris WA6ILQ Sent: Monday, July 06, 2009 4:23 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] ctcss dropout due to loud voice I think you will find that shouting into the mic will talk off the CTCSS. The last new radio I tested had 5.8-5.9 KHz dev fresh out of the box. My standard test is to yell a "FOUUUUUUUUUR" into the mic with my lips just a 1/4 inch off the mic grille. And it's instinctive for the people in a vehicle to speak up when traffic noises are loud, especially when the window(s) are open. A bench test on a brand new radio HAS to include yelling into the mic. Mike At 02:51 PM 07/06/09, you wrote: Thanks .These maxons pm160 are straight from the makers and the deviation hasn't been touched but I will check this radio on our service monitor and see how it goes. Thank You, Ian Wells, Kerinvale Comaudio, 361 Camboon Road.Biloela.4715 Phone 0749922574 or 0409159932 www.kerinvalecomaudio.com.au <http://www.kerinvalecomaudio.com.au/> -------Original Message------- From: Kris Kirby <mailto:k...@catonic.us> Date: 7/07/2009 07:40:08 To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Ctcss dropout due to loud voice On Tue, 7 Jul 2009, kerinvale wrote: > Hi guys .Can anyone suggest ways to reduce ctcss dropout when someone > is talking loud on a repeater .The repeater radios are maxon pm150 > (sm4450sc) and I have tuned them using 600hz of ctcss and a 1khz tone > at 3khz modulation to make sure it doesn't happen ,but I have one user > that talks louder than the other users and it seems to breakup all the > time for them where other users seem to have no problems.Could I make > sure their ctcss from their maxon pm160 is around 600hz or 700hz or > could the problem be more tied up with the receiving repeater radio Your user is over-deviating. Reduce the deviation in his radio, or tell him not to yell into the mic. The dropout is because his signal is passing outside of the receiver's bandpass. -- Kris Kirby, KE4AHR Disinformation Analyst Checked by AVG - www.avg.com Version: 8.5.375 / Virus Database: 270.13.5/2220 - Release Date: 07/05/09 17:54:00
