Does the receiver share a power source with the rest of the repeater, or is it separate? Our machine has several internal sources of power. each feeding a different device (transmitter, receiver, controller, etc.) So, it's possible for the power supply to develop a bad filter on the receiver side, causing a hum on repeated audio but not on the ID's.
Just a thought. 73, Mike WM4B From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of n9wys Sent: Saturday, August 09, 2008 11:06 AM To: [email protected] Subject: RE: [Repeater-Builder] Hum on MSR200 Receiver It just doesn't know the words.... ;-p Mark - N9WYS -----Original Message----- From: [email protected] <mailto:Repeater-Builder%40yahoogroups.com> On Behalf Of Bill Howdy group. I have a Motorola MSR2000 repeater on the ham bands that I maintain. VHF 147.32 in Austin (Oak Hill)Texas. It has developed a hum on the receive signal. I know it's the receiver as there is no hum when the machine ID's with no input from the receiver. The hum has been getting worse and now I need to take a look. I have schematics and instruments. I'm asking to see if anyone has seen this kind of issue before. I run a 114.8 PL but it sounds more like 60Hz not 114 hz I'll have to look at the audio and measure. The machine is on IRLP if anyone wants to take a listen the node is 3364. Any input would be helpful. Jim K5VPW monitors the machine and runs the IRLP node so he may be listening and is willing to assist. Bill N5ZTW
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