Hello Group, Recently installed a Kenwood TKR-820 on the ham band for a local repeater. Went through the service alignment and all checks well. Aligned both TX and RX VCO's and noticed while the transmitter is keyed, lightly tapping on any component in the TX/RX section modulates the carrier.
Didn't think much about this until we did the install. The repeater sits on a shelf in a television station transmitter room. The blowers and HVAC equipment in the room are rather loud. When I got back home, I keyed the repeater and noticed a continuous microphonic hum on the repeater carrier, obviously coming from the vibrations in the transmitter room. The "hum" isn't bothering anything. It's just barely there. I have noticed other TKR's doing this, some worse than others. Is there a common problem associated with these, and if so, is there a common fix? Thanks, Derek KC4FWC http://www.w4dex.com/kc4fwc/444400.htm Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
