I was working on a couple Mastr II stations with the same problem. A 5kW FM at the site was clearly getting into the audio. It turned out to be getting into the high pass filter of the ComSpec TS-64ds tone board. Bypassing the high pass filter made it go away completely. This was on two separate radios in the same rack. both with the identical problem. A third radio with a Norcomm board was fine. All audio wiring was shielded and everything was run through the feedthrough terminals.
Steve ----- Original Message ----- From: Ken Arck To: [email protected] Sent: Tuesday, February 13, 2007 10:09 AM Subject: [Repeater-Builder] Ok, here's a weird one.... Have a customer with the following issue: Scenario: Amateur repeater (Mastr II) installed at a 100,000 FM radio xmtr site. Issue: Very low level audio of radio station appears on Mastr II's xmtr (yes, external controller). Repeater owner hasn't fully explained what "very low level" means. But regardless..... Question: The only way I see this happening is due to some AM component on radio station's transmitter. Thoughts? Ken ---------------------------------------------------------- President and CTO - Arcom Communications Makers of the world famous RC210 Repeater Controller and accessories. http://www.arcomcontrollers.com/ Authorized Dealers for Kenwood and Telewave and we offer complete repeater packages! AH6LE/R - IRLP Node 3000 http://www.irlp.net
