Another way to validate the 1600 KHz theory is to tune the RX/TX split off of 1.6 MHz. You should easily be able to warp the RX at least +/- 10 KHz and the TX an opposite 10 KHz for a 1.58 or 1.62 MHz spacing. If the feedback goes away, 1600 KHz transmitters are the likely culprit. Best of luck solving that. Years ago at a broadcast tower site, 2 FM stations were 5 MHz apart. All of the UHF commercial guys left the tower (and other sites for about a mile radius) and we were fortunate enough to be allowed a non 5 MHz split for our ham repeater - problem solved for us! We later changed sites and moved to a 5 MHz split.
And I think others have mentioned that 1.6 MHz is a very common spacing for FM stations in a given market. Mike/W5JR ---[Original Message]--- From: [EMAIL PROTECTED] To: [email protected] Sent: Aug 27, 2008 4:58:11 PM Subject: [Repeater-Builder] Re: Feedback Problem Just an update on my issues with my 224.060 repeater feeding back into itself, and it possibly being related to a 1600 kHz AM station. I was up at the repeater site today and noticed another signal besides WUNR (20 miles away) on 1600 that gradually became very strong as I approached the site. With a portable radio, I found the signal to be coming from another piece of equipment in the same building that my repeater is located in. I'm going to ask the person that maintains that equipment if he can power it down for a minute sometime to see if my feedback goes away. Hopefully I'm onto something here... 73 Jeff Lehmann - N1ZZN Hanson, MA
