During the night time hours (after midnight), I've been listening to all channels from both sites. During the day there is so much traffic I turn off the PD and most traffic from the city site.
This morning I noticed that traffic from the city site (I was not paying attention to voice channels) was scratchier than usual so I locked out that control channel... and I turned off the PD as I usually do.
I've been noticing lately that channels with frequencies of 866.xxxx, regardless of whether they are on the city or county site, have been more difficult to receive. Just yesterday I was locked into an activity on CH PD 1 and sometimes I could not hear what they were saying. As soon as they unkeyed, and rekeyed, and a new channel was assigned, it was perfect. When it was unreadable it was always an 866.xxxx receive frequency, and in this case they were on the county control channel.
Note: I have never heard traffic from city 866.0500. It might be because the talk groups I listen to are not ever assigned those channels, or it might be a weak channel.
Another note: I've been paying attention to the physical channel being used with regard to the talkgroup ID. I've found that certain TG IDs will use a max of about 4 different frequencies in rotation. When we had the funeral last week they used IDs I had not listened in on before, and surely enough, they came up on some channels I had not received from before. They must do this so that garbage collectors are not on PD freqs and Sewer workers on Sheriff freqs or something like that.
I appreciate any insight others have.
George