Kevin, Please allow me to pick your brain.
I was just informed of an intermod problem with 2 two meter repeaters. They are on towers about 2 miles apart. The frequencies are 147.33+ tone 107.2 & 147.165+ no tone. Two weeks ago I replaced the 147.33 equipment with a Mastr II station repeater & 4 cavity DB duplexer. I believe the 147.165 repeater to be a Micor. When the 165 is on the air, 33 can be heard on the input of 165. I show a third order of 270 kHz away & a fifth order of 270 & 105 kHz away. TCS Consultants, Inc. P.O. Box 884 Montgomery, TX 77356 (936) 588-3200 phone | (936) 588-4434 fax | http://www.tcstx.com _____ Site Name: BG33 Frequency Separation: 600.00 KHz Site Description: Ham Calculate 1st Order: true Company: Calculate 2nd Order: true User Name: Fred Flowers Calculate 3rd Order: true Address: Calculate 4th Order: true Time of Printing: February 03, 2007 Calculate 5th Order: true _____ Transmitter Frequencies 147.16500 MHz 147.33000 MHz Receiver Frequencies 147.76500 MHz _____ Transmitter Freq(s). Receiver Freq. Freq. Separation First Order (Direct) Results: 147.1650 MHz 147.7650 MHz 600.00 KHz 147.3300 MHz 147.7650 MHz 435.00 KHz Second Order Results: Third Order Results: 147.1650 MHz - 147.1650 MHz - 147.1650 MHz 147.7650 MHz 600.00 KHz 147.1650 MHz + 147.1650 MHz - 147.1650 MHz 147.7650 MHz 600.00 KHz 147.1650 MHz - 147.1650 MHz - 147.3300 MHz 147.7650 MHz 435.00 KHz 147.1650 MHz - 147.3300 MHz - 147.3300 MHz 147.7650 MHz 270.00 KHz 147.1650 MHz + 147.3300 MHz - 147.3300 MHz 147.7650 MHz 600.00 KHz 147.3300 MHz - 147.3300 MHz - 147.3300 MHz 147.7650 MHz 435.00 KHz 147.3300 MHz + 147.3300 MHz - 147.3300 MHz 147.7650 MHz 435.00 KHz Fourth Order Results: Fifth Order Results: 147.1650 MHz + 147.1650 MHz + 147.1650 MHz - 147.1650 MHz - 147.1650 MHz 147.7650 MHz 600.00 KHz 147.1650 MHz + 147.1650 MHz - 147.1650 MHz - 147.1650 MHz - 147.1650 MHz 147.7650 MHz 600.00 KHz 147.1650 MHz + 147.1650 MHz - 147.1650 MHz - 147.1650 MHz - 147.3300 MHz 147.7650 MHz 435.00 KHz 147.1650 MHz + 147.1650 MHz - 147.1650 MHz - 147.3300 MHz - 147.3300 MHz 147.7650 MHz 270.00 KHz 147.1650 MHz + 147.1650 MHz - 147.3300 MHz - 147.3300 MHz - 147.3300 MHz 147.7650 MHz 105.00 KHz 147.1650 MHz + 147.3300 MHz + 147.3300 MHz - 147.3300 MHz - 147.3300 MHz 147.7650 MHz 600.00 KHz 147.1650 MHz + 147.3300 MHz - 147.3300 MHz - 147.3300 MHz - 147.3300 MHz 147.7650 MHz 270.00 KHz 147.3300 MHz + 147.3300 MHz + 147.3300 MHz - 147.3300 MHz - 147.3300 MHz 147.7650 MHz 435.00 KHz 147.3300 MHz + 147.3300 MHz - 147.3300 MHz - 147.3300 MHz - 147.3300 MHz 147.7650 MHz 435.00 KHz Calculations: 70 IM Products Found: 18 C Copyright 2007 - TCS Consultants, Inc. - All rights reserved. My question is, are the 105 & 270 kHz signals close enough to cause problems with a Micor receiver? I have worked on Mastr II's sense they came out. I have spent the same amount of time running from Micor's. :-) BTW I heard through the grape vine that the owner of 165 added a preamp in the last day or so. I don't know what kind. I don't know how he's dealing with desense. Thanks Fred N4GER
