I think I see how Steve's logic is leaning, and I agree - I don't see any logical mix here until you include a user's transmission on one of the repeater's inputs. Fred - do you hear ALL 147.33 transmitter activity coming in on the 147.765 input, or just when there is actually a user keyed up on 147.93? If the latter, that's a big clue...
--- Jeff > -----Original Message----- > From: Repeater-Builder@yahoogroups.com > [mailto:[EMAIL PROTECTED] On Behalf Of Steve > Bosshard (NU5D) > Sent: Saturday, February 03, 2007 1:51 PM > To: Repeater-Builder@yahoogroups.com > Subject: Re: [Repeater-Builder] Intermod > > Shouldn't the 147.765 subscriber station be counted in the > mix? While the distance and field strength may vary, the > user sending to the 147.165 does make a contribution to the mix. sb > > > > On 2/3/07, Fred Flowers <[EMAIL PROTECTED]> wrote: > > 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. > > > > > > > > > > > > > ________________________________ > > 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 > > > > > > > -- > Ham Radio Spoken Here.....NU5D > Visit the Temple Ham Club Website > http://www.tarc.org > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.1.411 / Virus Database: 268.17.21/665 - Release > Date: 2/2/2007 > > >