[Repeater-Builder] 6 meter repeater interference
Hello to All, I just got a new neighbor at my 6 meter repeater site, a low power (30 watt) FM broadcast station on 94.9MHZ. I now have low level interference on my MastrII repeater input frequency. As a simple troubleshooting tool, I thought about putting a low pass filter on the receiver or the antenna connection to the duplexer. This would attenuate any 94.9Mhz signal coming down the coax. My thoughts are to take the low pass filter out of a MastrII PA, but I don't know what the input impeadance to it is. Does anyone know if the final PA of a MasterII is 50 ohms into the low pass filter? I belive that it is, but not sure. 73, Joe, k1ike Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] 6 meter repeater interference
You might have better luck with shorted coax stubs on the target frequency with tees to the feeder line and at both ends of the coax. On 7/6/05, Joe [EMAIL PROTECTED] wrote: Hello to All, I just got a new neighbor at my 6 meter repeater site, a low power (30 watt) FM broadcast station on 94.9MHZ. I now have low level interference on my MastrII repeater input frequency. As a simple troubleshooting tool, I thought about putting a low pass filter on the receiver or the antenna connection to the duplexer. This would attenuate any 94.9Mhz signal coming down the coax. My thoughts are to take the low pass filter out of a MastrII PA, but I don't know what the input impeadance to it is. Does anyone know if the final PA of a MasterII is 50 ohms into the low pass filter? I belive that it is, but not sure. 73, Joe, k1ike Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] 6 meter repeater interference
Joe, Because the separation (about 45 MHz) is significant, you might consider installing a cavity filter on your receiver input. A less expensive solution might be to order up a helical resonator filter from DCI. Don't forget that the FM station operator has an obligation to not interfere with other licensed stations, so he/she must step up to the plate and be a part of the solution. Write a letter to the station manager explaining the interference problem, and ask for his/her assistance in reaching a solution. Don't wait to do this! 73, Eric Lemmon WB6FLY Joe wrote: I just got a new neighbor at my 6 meter repeater site, a low power (30 watt) FM broadcast station on 94.9 MHz. I now have low level interference on my MastrII repeater input frequency. As a simple troubleshooting tool, I thought about putting a low pass filter on the receiver or the antenna connection to the duplexer. This would attenuate any 94.9 MHz signal coming down the coax. My thoughts are to take the low pass filter out of a MastrII PA, but I don't know what the input impedance to it is. Does anyone know if the final PA of a MasterII is 50 ohms into the low pass filter? I believe that it is, but not sure. Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
